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™ StorageTek T9840 Tape Drive User’s Reference Manual Sun Microsystems, Inc. www.sun.com Part No. 95739 September 2008, Revision YA Submit comments about this document at: SLSFS@Sun.com...
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Copyright 2008 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, Californie 95054, Etats-Unis. Tous droits réservés. Sun Microsystems, Inc. a les droits de propriété intellectuels relatants à la technologie qui est décrit dans ce document. En particulier, et sans la limitation, ces droits de propriété intellectuels peuvent inclure un ou plus des brevets américains énumérés à...
Revision History Date Revision Description 112188 October 1998 Initial release 113499 February 1999 See this edition for a description of changes. 112275 April 1999 See this edition for a description of changes. 112388 September 1999 See this edition for a description of changes. 112350 November 1999 See this edition for a description of changes.
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4 T9840 User’s Reference Manual • September 2008 Revision YA • 95739...
Contents Revision History 3 Contents 5 Figures 9 Tables 11 Preface 13 Organization 13 Alert Messages 14 Mensajes de alerta 14 Typographical Conventions 15 Related Publications 15 Sun’s External Web Site 16 Customer-Initiated Maintenance 17 Notices 19 United States FCC Compliance Statement 19 Japanese Compliance Statement 20 Taiwan Warning Label Statement Internal Code License Statement 21...
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Encryption Status LED 25 Configurations 26 Desktop and Rack-mountable Drive Units 26 Cartridge Scratch Loader Drive Units 27 Library Attached Configurations 28 Interfaces 29 Cartridges 30 Mixed Media Management 31 Media Information Region 32 Normal MIR Processing 33 Cross-Density MIR Processing 33 T9840D Tape Drive Loaded With a Lower-Density Cartridge 33 T9840C tape Drive Loaded With a T9840D Data Cartridge 34 T9840C Tape Drive Loaded With a T9840A/B Data Cartridge 34...
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Properties 49 Display 50 Menus 51 Menu Structure Overview 51 Online Menu Operation 53 View Configuration Menu 53 View TCP/IP Menu 53 Fibre Channel View Configuration Menu Tree (T9840A/B/C) 55 Fibre Channel View Configuration Menu Tree (T9840D) 56 SCSI View Configuration Menu Tree 57 ESCON View Configuration Menu Tree 58 FICON View Configuration Menu Tree (T9840B/C) 59 FICON View Configuration Menu Tree (T9840D) 60...
Preface This manual contains information about the StorageTek T9840A, T9840B, T9840C, and T9840D tape drives. It is a guide for operating the drive and repenting to operator panel messages that occur operating the drive. The specific model suffix will be used only as required for differentiation.
Alert Messages Alert messages call your attention to information that is especially important or that has a unique relationship to the main text or graphic. Note – A note provides additional information that is of special interest. A note might point out exceptions to rules or procedures.
Typographical Conventions Typographical conventions highlight special words, phrases, and actions in this publication. Item Example Description of Convention Commands Mode Select Initial cap Document titles System Assurance Guide Italic font Emphasis not or must Italic font Menu options Exit Bold Hypertext links Figure 1 on page 25 Blue (prints black in hardcopy publications)
Publications regarding Sun Microsystems tape device software products: Sun Microsystems Software Products A list of Sun Microsystems tape device software products can be found online at: http://docs.sun.com/app/docs/prod/tape.device#hic Sun’s External Web Site Sun’s external Web site provides marketing, product, event, corporate, and service information.
Microsystems StorageTek Support. You receive immediate attention from qualified personnel, who record problem information and respond with the appropriate level of support. To contact Sun Microsystems StorageTek Support about a problem: http://www.sun.com/storagetek/support/index.jsp This section describes what to do if problems occur with the tape drive. In some cases, you might be able to correct the problem.
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Notices Please read the following compliance and warning statements for this product. Caution – Potential equipment damage: Cables that connect peripherals must be shielded and grounded; refer to descriptions in the cable instruction manuals. Operation of this equipment with cables that are not shielded and not correctly grounded might result in interference to radio and TV reception.
Japanese Compliance Statement The following compliance statement in Japanese pertains to VCCI EMI regulations: English translation: This is a Class A product based on the Technical Requirement of the Voluntary Control Council for Interference by Information Technology (VCCI). In a domestic environment, this product may cause radio interference, in which case the user may be required to take corrective actions.
Internal Code License Statement The following is the Internal Code License Agreement from StorageTek: NOTICE INTERNAL CODE LICENSE PLEASE READ THIS NOTICE CAREFULLY BEFORE INSTALLING AND OPERATING THIS EQUIPMENT. THIS NOTICE IS A LEGAL AGREEMENT BETWEEN YOU (EITHER AN INDIVIDUAL OR ENTITY), THE END USER, AND STORAGE TECHNOLOGY CORPORATION (“STORAGETEK”), THE MANUFACTURER OF THE EQUIPMENT.
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(iii) sublicense, assign, or lease the Internal Code 8. You acknowledge that copies of both Internal Code and Maintenance Code might be installed on the or permit another person to use such Internal Equipment before shipment or included with the Code, or any copy of it.
C H A P T E R Overview This chapter provides an overview of the T9840 Tape Drive family. Tape Drive The T9840 Tape Drive is designed for fast-access to data stored on a midpoint loading tape cartridge. Four drive models are available for the enterprise and client-server environments.
Tape Drive Use of the RJ45 maintenance port on a non-encrypiton drive is restricted to Sun service personnel only. Note – Customer attachment to the maintenance port of a non-encrypiton drive has caused problems. Sun neither supports nor assumes any responsibility for unauthorized use of the maintenance port by non-Sun personnel.
Tape Drive Encryption Status LED Encryption-capable drives have a tri-color, encryption-status LED on the rear panel, see for an explanation of the status indications. Drive trays that fully TABLE 1-1 on page 26 enclose the drive usea light pipe to transfer the LED indication to the rear of the tray (see the label in the figure below).
Configurations The following table interprets the various states of the encryption status LED. Refer to the Crypto Key Management documentation for additional information. Encryption Status LED State Descriptions TABLE 1-1 LED State Mode Description Green Safe Encryption capable, but not enabled. Normal-unencrypted drive write/read cartridge operations.
Configurations T9840 Desktop and Rack-mount Units FIGURE 1-3 Desktop Unit Rack-Mount Tray C54002 Up to six single-drive and/or dual-drive trays may coexist in a single cabinet, such as the stand-alone CBNT42U rack. The tray fits in a standard 483-mm (19 in.) rack with a depth of at least 780 mm (30.75 in).
Configurations Library Attached Configurations The drive is available in configurations for various libraries; several are shown in the following figure. Refer to the appropriate library documentation for additional information. T9840 Tape Drive Library Attached Configurations FIGURE 1-5 Tray Assembly for 9310/9360/9740/L5510 Tray Assembly for 9710 (T9840A/B) Tray Assembly for 9738 (T9840A) Tray Assembly for Libraries L180/L700/L1400...
Interfaces Interfaces Host interfaces for the T9840 Tape Drive include: Enterprise Systems Connection (ESCON) [single port connector] ■ Fibre Channel (FC) ■ Fibre Connection (FICON) ■ Small computer system interface (SCSI) - T9840A/B only [single port connector] ■ Note – Not all interfaces are available for all configurations, see TABLE A-8 on page 92 The T9x40 tape drives support connection of both ports in accordance with ANSI Fibre Channel specifications.
Cartridges Cartridges The 9840 data cartridge shown in the figure below has the supply and takeup reels inside the cartridge which permits midpoint loading and fast access to data files. 9840 Tape Cartridge FIGURE 1-6 CUSTOMER LABEL MANUFACTURER AREA LABEL AREA WRITE PROTECT...
Mixed Media Management Mixed Media Management Since T9840A, T9840B, T9840C, and T9840D drives use the same 9840 standard data cartridge, you should take extra media management measures when: T9840C drives co-exist in the same library system with T9840A/B drives ■ T9840D drives co-exist in the same library system with T9840A/B/C drives ■...
Mixed Media Management The T9840C or T9840D tape drive can read data from a tape cartridge written by a T9840A/B tape drive in the low-density format, but does not append data to that cartridge. An attempt to append a low-density data cartridge on a T9840C or T9840D drive will fail, and sense byte data indicates an error (similar to that of a file-protected data cartridge).
Mixed Media Management Normal MIR Processing Every time a tape cartridge is loaded, the MIR is read from the tape media and saved in the drive memory. When the MIR is loaded in drive memory, an invalid flag is written in the tape-resident MIR.
Mixed Media Management The T9840D tape drive cannot correct or cause an invalid MIR on a T9840A/B ■ written data cartridge. A T9840A/B MIR can only become invalid during a mount on a T9840A/B drive. If a T9840C or T9840A/B written data cartridge has an invalid MIR, its contents ■...
Mixed Media Management If a low-density data cartridge MIR is invalid, it is not read into the T9840C drive ■ memory, and not available for user data pointer information. Therefore, T9840C performance for a low-density data cartridge with an invalid MIR is degraded. Since a T9840C tape drive cannot correct nor rebuild a low-density data cartridge ■...
Mixed Media Management If a T9840A/B drive has down level drive firmware, a high-density data cartridge ■ would be considered as a blank tape cartridge; and, a low-density data cartridge would lose statistical data stored in the FIB during a previous mount into a T9840C drive.
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Mixed Media Management Notes: If a tape cartridge with a partially valid MIR is mounted for long periods of time ■ with locates to different locations, locate times will be inconsistent depending on whether the locate is to a record already in the rebuilt MIR, or if some low speed locate is required.
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C H A P T E R Operator Controls Several methods are available that enable you to determine the state of the tape drive, perform operator tasks, or view and alter drive configuration settings. All T9840 drives have a physical operator panel. You can use this panel to access the drive menu system, to view drive indicators, to access front panel switches, and to load a tape cartridge.
Front Panel Front Panel The T9840 tape drive front panel is the operator’s interface with the drive. The panel features: a cartridge load/unload slot, four indicator lights, four switches, a manual unload device, and an alphanumeric display with an optional tape bar ( FIGURE 2-1 T9840 Operator Panel FIGURE 2-1...
Front Panel Indicators describes T9840 Tape Drive operator panel indicators. TABLE 2-1 Operator Panel Indicators TABLE 2-1 Indicator Indication Explanation power (green) Off: Power is not applied. Flashing: Unit is powering up, performing IPL, or collecting dump data. Flashing does not stop: IPL failed.
Front Panel Display The operator panel has a 10 segment, alphanumeric display that indicates: Drive status ■ Menu selections and configuration choices ■ Error messages and fault symptom codes ■ Host-generated messages ■ Tape bar, if activated ■ The display is formed by a horizontal array of 10 segments. Each segment is formed by an array of 35 dots—five wide and seven high ( ).
Front Panel Switches describes T9840 operator panel switch functions. TABLE 2-2 Operator Panel Switches TABLE 2-2 Switch Description Menu Pressing the Menu switch accesses the menu system, steps through a series of submenus, or answers No to a displayed question. Pressing the Menu switch the first time causes the Online/Offline selection to display.
Virtual Operator Panel Virtual Operator Panel The Virtual Operator Panel provides a graphical user interface to the T9840D tape drive. The interface contains several menus, a set of indicators, two small display areas, and a text pane (see FIGURE 2-3 The Drive Operations menu provides commands to perform actions that are similar to the physical operator panel switches.
Library Controls/Indicators Library Controls/Indicators When a T9840 Tape Drive is attached to the SL3000 or SL8500 Modular Library System, you cannot access the drive operator panel on the front of the drive without opening the library door. The drive tray rear panel does provide some indicators and an Ethernet port.
Library Controls/Indicators StorageTek Library Console Although you cannot access the T9840 Tape Drive Operator Panel to view menu items, you can use the StorageTek Library Console (SLC), local or remote, to display data pertinent to the attached drives. Note – General guidance on using the SLC application is available within the SLC “Help”...
Library Controls/Indicators The “Code Ver” column displays the drive’s current firmware level, including the drive interface sub-module level. Interface level 4.06, or higher is required for proper SL8500 operation. Drive Specific Displays When you select an individual drive in the tree pane, the right pane changes to display drive-specific data instead of the drive folder summary data.
Library Controls/Indicators Properties The General block in the Properties tab, , displays some of the data from the FIGURE 2-7 drive folder summary plus the drive interface type (not displayed in the summary). The Drive Configuration block displays selected configuration items, such as World- Wide-Name (this is a dynamic value, dWWN, that is auto-set by the library relative to the drive bay number).
C H A P T E R Menus The menu system provides the operator and service representative a means to determine drive configuration settings, access drive utilities, and display the drive firmware level at the drive operator panel. The menu system consists of information or values, submenus, and options that appear in the display section of the operator panel (see “Display”...
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Menu Structure Overview The drive is available with several data path interfaces. The main menu items do have some variation based upon the particular interface, and those variations are presented in later sections of this chapter. Note – The Port Enable/Disable item does not appear as a main menu item for all drive interfaces.
Online Menu Operation Online Menu Operation When the drive is Online, the menus shown in are available. Press FIGURE 3-1 on page 54 to advance to the View Configuration menu. Menu View the drive configuration ■ View the TCP/IP configuration (N/A for the T9840A) ■...
Online Menu Operation Fibre Channel View Configuration Menu Tree (T9840A/B/C) Use the online view configuration menu tree as a brief guide. Online/Offline [Press Select to toggle, then press Menu to set.] Port X YYY {A/B and ENA/DIS} View CFG ? (View Configuration) {Press Select to enter, press Menu to bypass.] Cmprss xxx {Yes/Off/No} (compression mode) Full DSE x {Y/N} (data security erase mode) {Y/N} (standard label protection mode)
Online Menu Operation Fibre Channel View Configuration Menu Tree (T9840D) Use the online view configuration menu tree as a brief guide. Online/Offline [Press Select to toggle, then press Menu to set.] View CFG ? (View Configuration) [Press Select to enter, press Menu to bypass.] Intf XXXXX {FICON/FCP} View PrtA? (view current port attributes) A=xxxxxxay (24-bit address ID - when port login is complete)
Online Menu Operation SCSI View Configuration Menu Tree Use the online view configuration menu tree as a brief guide. Online/Offline [Press Select to toggle, then press Menu to set.] View CFG? (View Configuration) [Press Select to enter, press Menu to bypass.] Cmprss xxx {Yes/Off/No} (compression mode) Full DSE x {Y/N} (data security erase mode) SL Prot x (Y/N) (standard label protection mode)
Online Menu Operation ESCON View Configuration Menu Tree Use the online view configuration menu tree as a brief guide. Online/Offline [Press Select to toggle, then press Menu to set.] Port xxx {ENA/DIS} (enables or disables the ESCON port) View CFG? (View Configuration) [Press Select to enter, press Menu to bypass.] Cmprss Xxx {Yes/Off/No} (compression mode) Full DSE X {Y/N} (data security erase mode) Drv Adr xy (2-character hexidecimal logical drive address - usually 00)
Online Menu Operation FICON View Configuration Menu Tree (T9840B/C) Use the online view configuration menu tree as a brief guide. Online/Offline [Press Select to toggle, then press Menu to set.] View CFG ? (View Configuration) [Press Select to enter, press Menu to bypass.] Intf FICON View PrtA? (view current port attributes) A=xxxxxxay (24-bit address identifier, connection type, and port speed - when...
Online Menu Operation FICON View Configuration Menu Tree (T9840D) Use the online view configuration menu tree as a brief guide. Online/Offline [Press Select to toggle, then press Menu to set.] View CFG ? (View Configuration) [Press Select to enter, press Menu to bypass.] Intf XXXXX {FICON/FCP} View PrtA? (view current port attributes) A=xxxxxxay (24-bit address identifier, connection type, and port speed - when...
Online Menu Operation TCP/IP View Configuration Menu Use the following menu tree as a brief guide to view the TCP/IP settings of the T9840D tape drive. Online/Offline [Press Select to toggle, then press Menu to set.] View CFG ? [Press Menu to bypass.] View TCP ? [Press Select to enter, press Menu to bypass.] DHCP x {Y/N} (must be set to “N”...
Offline Menus Offline Menus With the offline menus, the operator can change configuration settings, reformat a data tape cartridge and build the media information region (MIR) on a tape cartridge., Offline Menus/Interface Menu Tree FIGURE 3-2 Change Drive Change Drive Change Drive ChangeTCP/IP View Drive...
Offline Menus Configuration Changes You can change configuration settings from the drive offline menu system. You will continue to use the switches to navigate the offline menu system. Menu Select You enter the configuration or TCP/IP submenu when you press the switch Select while the main menu item appears in the display.
Offline Menus Drive Operations Menu The Drv Menu ? branch of the main menu is the same for Fibre Channel, SCSI, ESCON, and FICON interfaces. shows an expansion of the drive operations FIGURE 3-3 sub-menus. Note that the menu items both preceding and following the Drv Menu ? branch vary with the type of data path interface (see for specific menu items).
C H A P T E R Operator Tasks This chapter discusses operator tasks primarily for desktop and rack-mounted tape drives. Most of these tasks rely on the physical operator panel switches, alphanumeric display, and the drive menu system. Note – For operator tasks relating to drives within a library, consult the appropriate library operator guide.
Power-on the Drive Power-on the Drive To apply power to the desktop or rack-mount configuration: 1. Make sure the power cord is connected from the receptacle on the chassis rear panel to an AC power outlet or power strip. 2. Make sure that all interface cables are fully seated. 3.
IPL the Drive IPL the Drive To IPL (initial program load) a drive that is already powered on: 1. Make sure the tape drive is not in use. Checking for the following elements: a. There are no active jobs, applications, or programs using this drive. b.
Write-protect/Enable a Data Cartridge Write-protect/Enable a Data Cartridge To write-protect or write-enable a data cartridge, move the write-protect switch on the cartridge to the desired setting. The write-protect switch is located on the side of the cartridge as shown in FIGURE 4-1 The switch points to a padlock symbol on the case to indicate the following status: Locked...
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Load a Data Cartridge Load a Data Cartridge To load a cartridge into a T9840 tape drive: Note – A T9840 tape drive accepts only T9840 cartridges. 1. Inspect the cartridge for damage (see “Identify a Damaged Cartridge” on page 95).
Unload a Data Cartridge Unload a Data Cartridge To remove a cartridge from the drive: Caution – Possible data corruption: Do not push the switch while a data Unload cartridge is in use. Doing so could cause the tape drive to stop writing and result in corrupted data on the tape.
Clean the Drive Clean the Drive After the tape drive transports a predetermined length of tape or records a pre- determined number of errors, the indicator lights. It is time to clean the tape Clean drive. Note – Use the appropriate cleaning cartridge for the drive model (see “Cartridges”...
Menu System Tasks Menu System Tasks The remaining operator tasks are accomplished by using the drive menu system. Some tasks can be performed from the offline menu system only. Place the Drive Online To change the tape drive state from offline to online: 1.
Menu System Tasks 3. Press the operator panel switch (Yes) to enter the view configuration Select submenus. The first configuration setting appears in the operator panel display window. 4. Press either the or the switch to step through the configuration settings. Menu Select Note –...
Menu System Tasks In open systems environments, this is usually done by either: Stopping the job that is using that tape drive ■ Or, in a multi-host setting, by making sure that any job using that tape drive has ■ been stopped and then blocking (disabling) the switch port to that tape drive, if there is a switch unit in use.
Menu System Tasks 9. Press the switch until Exit Drv ? appears in the display. Menu 10. Press either the switch to enter the main menu or the switch to repeat the Select Menu drive operations menu. 11. Press the Menu switch until Exit Menu? appears in the display 12.
Menu System Tasks 12. Press either the switch to enter the main menu or the switch to repeat the Select Menu drive operations menu. 13. Press the Menu switch until Exit Menu? appears in the display 14. Press either the Select switch to exit the menu system or the Menu...
C H A P T E R Indicators and Messages This chapter summarizes the operator panel indicator lights and display messages. Indicators shows the meaning of the indicators located on the front panel and the TABLE 5-1 recommended action. Operator Panel Indicators TABLE 5-1 Indicators power...
Messages Operator Panel Indicators (Continued) TABLE 5-1 Indicators power activity clean service Meaning Recommended Action Flashing Cleaning is proceeding. None. A drive error occurred. Perform an IPL on the drive. If the problem persists, contact authorized service personnel. Flashing An error occurred and Observe the display message.
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Messages Operator Panel Display Messages (Continued) TABLE 5-2 Display Meaning Recommended Action cnhndnsn The tape drive firmware level is Contact authorized service personnel. (Hardware insufficient to control the tape drive revision level hardware. supported by the firmware in this drive) CodCrFail1 The tape drive cannot write code onto the Ensure that the tape is write-enabled, or try...
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Messages Operator Panel Display Messages (Continued) TABLE 5-2 Display Meaning Recommended Action DumpAgain? The tape drive detected the same error IPL the tape drive. If the problem persists, alternating with within a minute. contact authorized service personnel. CHK xxxx, where Note: The Service indicator is flashing.
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Messages Operator Panel Display Messages (Continued) TABLE 5-2 Display Meaning Recommended Action Online The tape drive is online. None OnLn Pend The online state is pending completion of None IPL diagnostics. Power Fail The power supply failed. Contact authorized service personnel. Reading The tape drive is reading data.
Messages Potential Operator Recovery Scenarios The following table contains Fault Symptom Codes (FSCs) that commonly result from an operator error. The first column in the table lists an operator panel message at the time of the error event. The description column provides insight into the error condition from which you should be able to determine a recovery action.
Messages Translated Messages lists operator panel display messages that are translated when the drive TABLE 5-4 configuration Language option is set to something other than English. Translated Display Messages TABLE 5-4 English Espanol Francais Italiano Deutsch *CLEANING* *LIMPIEZA* *NETTOYAGE *PULIZIA* *REINIGEN* CHK XXXX ERR XXXX...
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A P P E N D I X Specifications This appendix lists the physical, power, and performance specifications for the T9840 tape drive plus the environmental requirements for the drive and data cartridges. Physical Specifications This section lists the physical specifications for T9840 tape drives in three configurations: desktop, rack mount, and library attached.
Physical Specifications Desktop Configuration The T9840 desktop configuration is a single enclosed assembly. T9840 Tape Drive Desktop Physical Specifications TABLE A-2 Characteristic Manual-Load Drive Cartridge Scratch Loader Chassis dimensions 230 mm (9.1 in.) wide 483 mm (19 in.) wide 197 mm (7.7 in.) high 160 mm (6.5 in.) high 630 mm (24.8 in.) deep 483 mm (19 in.) deep...
Power Specifications Refer to the appropriate library System Assurance Guide for the physical dimensions and weights of the library and frame. Power Specifications The power specifications for the T9840 tape drive are listed in the following table. T9840 Tape Drive Power Specifications TABLE A-5 Characteristic Value...
Environmental Requirements Environmental Requirements This section lists the environmental requirements for the tape drive, power supply, and tape cartridge. Tape Drive and Power Supply This section lists the environmental requirements for the tape drive and the power supply. T9840 Tape Drive and Power Supply Environmental Requirements TABLE A-6 Description Range...
Performance Specifications Tape Cartridge lists the physical and performance specifications for the T9840 data cartridge. TABLE A-9 The cleaning cartridges have the same physical specifications. T9840 Data Cartridge Physical and Performance Specifications TABLE A-9 Characteristic Value Cartridge physical data Drive compatibility T9840A, T9840B, T9840C, T9840D Form factor 1/2 in.
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A P P E N D I X Cartridge Care 9840 cartridges require care to ensure proper operation and longevity. Handling Caution – Tape cartridge damage or data loss: Handle tape cartridges properly. Follow these guidelines to handle tape cartridges properly: Never open a data cartridge or touch the tape.
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A missing or broken access door ■ A damaged file-protect switch ■ Liquid in the cartridge ■ A loose label (replace or remove the label) ■ Any other obvious damage ■ Cleaning Wipe all dust, dirt, and moisture from the cartridge case with a lint-free cloth. Shipping Caution –...
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Glossary This glossary defines terms and abbreviations in this publication. Some of the definitions are taken from other glossaries. The letters in the parentheses that follow some definitions indicate the source of the definition: (A) The American National Standard Dictionary for Information Systems, ANSI X3.172-1990, copyright 1990 by the American National Standards Institute (ANSI).
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block A collection of contiguous records recorded as a unit. Interblock gaps separate blocks, and each block can contain one or more records. buffer A routine or storage that compensates for a difference in the rate of data flow, or the time of occurrence of events when transferring data from one device to another.
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Data Security Erase (DSE) A random binary pattern, over-writing existing data, from the point of an “Erase” command to the End of Tape point. data tape A data cartridge formatted for use as a regular data tape for the system in which it is used.
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fault symptom code (FSC) A four-character hexadecimal code generated in response to an error to help isolate failures within the device. Some FSCs are for information purposes only. FC See Fibre Channel. fiber optics The branch of optical technology concerned with the transmission of radiant power through fibers made of transparent materials such as glass, fused silica, and plastic.
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hardware All or part of the physical components of an information processing system, such as computers or peripheral devices. (T) (A) host The primary computer on a network, with which other computers interact. host interface An interface between a network and host computer. (T) hub A Fibre Channel Arbitrated Loop switching device that allows multiple servers and targets, such as storage systems, to connect at a central point.
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magnetic tape A tape with a magnetizable layer on which data can be stored. (T) manual operation Processing of data in a system by direct manual techniques. (IBM) MB Megabytes, or 1,048,576 bytes. menu A list of options displayed to the user by a data processing system, from which the user can select an action to be initiated.
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port A specific communications end point within a host. A port is identified by a port number. (IBM) R/W Read/write read/write head The data sensing and recording unit of a tape drive. (IBM) reclaim The act of overwriting a 9840 legacy data cartridge by a newer generation drive. For example, a cartridge written by a T9840A drive can be overwritten (reclaimed) by either a T9840C or T9840D drive while a cartridge written by a T9840C drive can be reclaimed by a T9840D drive.
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transmission control protocol/internet protocol (TCP/IP) A set of communication protocols that support peer-to-peer connectivity functions for both local and wide area networks. (IBM) vary offline To change the status of a device from online to offline. When a device is offline, no data set may be opened on that device.
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