Page 4
Seagate Technology LLC. Other product names are registered trademarks or trademarks of their owners. Seagate reserves the right to change, without notice, product offerings or specifications. No part of this publica- tion may be reproduced in any form without written permission of Seagate Technology LLC.
Revision status summary sheet Revision Date Rev. A 12/11/2000 Rev. B 02/27/2001 Rev. C 05/24/2001 Rev. D 07/30/2001 Rev. E 10/09/2001 Notice. Product Manual 75789517 is Volume 1 of a two-volume document with the SCSI interface information in the SCSI Interface Product Manual, Volume 2, part number 75789509. If you need the SCSI interface information, order the SCSI Interface Product Manual, Volume 2, part number 75789509.
The SCSI Interface Product Manual , part num- ber 75789509, describes general SCSI interface characteristics of this and other families of Seagate drives. The SCSI Interface Product Manual references information from the documents listed in Section 2.3.
Mounting by bottom holes must meet the requirements of Section 8.4. Standards The Cheetah 36XL family complies with Seagate standards as noted in the appropriate sections of this Manual and the Seagate SCSI Interface Product Manual , part number 75789509.
• EUT name (model numbers): ST336705LC, ST336705LW, ST318405LW, ST318405LC, ST39205LC, ST39205LW. • Certificate number: E-H011-01-0340(B), E-H011-01-0341(B), E-H011-01-0347(B), E-H011-01-0344(B), E-H011-01-0346(B), E-H011-01-0345(B) respectively. • Trade name or applicant: Seagate Technology International • Manufacturing start date: 01/2001 • Manufacturer/nationality: Singapore Taiwanese BSMI If this model has two Chinese words meaning “EMC certification” followed by an eight digit identification num-...
(Volume 1), which defines the product performance char- acteristics of the Cheetah 36XL family of drives, and the SCSI Interface Product Manual , part number 75789509, which describes the general interface characteristics of this and other families of Seagate SCSI drives.
Cheetah 36XL Product Manual, Rev. E An automatic shipping lock prevents potential damage to the heads and discs that results from movement dur- ing shipping and handling. The shipping lock automatically disengages when power is applied to the drive and the head load process begins.
Standard features The Cheetah 36XL family has the following standard features: • Integrated Ultra160 SCSI controller • Multimode SCSI drivers and receivers—single-ended (SE) and low voltage differential (LVD) • 16 bit I/O data bus • Asynchronous and synchronous data transfer protocol •...
Formatted capacities Formatted capacity depends on the number of spare reallocation sectors reserved and the number of bytes per sector. The following table shows the standard OEM model read capacities data. Total LBAs = read capacity data (shown below) +1. Formatted (data block size 512 bytes/sector) [1]...
SCSI interface data transfer rates (asynchronous): Maximum instantaneous 8 bit wide Maximum instantaneous 16 bit wide Synchronous formatted transfer rates: In SCSI Wide (16 bit) Sustainable data transfer rates: Minimum Average Maximum Sector Sizes: Default 512 byte user data blocks Variable 512 to 4,096 bytes per sector in even number of bytes per sector.
enabled and disabled independently via the Mode Select command. However, in actual operation the prefetch feature overlaps cache operation somewhat as is noted in Section 4.5.1 and 4.5.2. All default cache and prefetch Mode parameter values (Mode Page 08h) for standard OEM versions of this drive family are given in Tables 7 and 8.
RCD. When a write command is issued, if RCD=0, the cache is first checked to see if any logical blocks that are to be written are already stored in the cache from a previous read or write command. If there are, the respective cache segments are cleared.
Page 23
The base cache buffer configuration for desktop or server environments needs to be set correctly by the host system. This involves setting the PM bit in Mode Page 0, Byte 2, as well as the number of cache buffer seg- ments in Mode Page 8, Byte 13.
Reliability specifications The following reliability specifications assume correct host/drive operational interface, including all interface timings, power supply voltages, environmental requirements and drive mounting constraints (see Section 8.4). Seek Errors Read Error Rates [1] Recovered Data Unrecovered Data Miscorrected Data MTBF Service Life Preventive Maintenance Note.
error (15h) is reported with a Medium error (3h) or Hardware error (4h) reported in the Sense Key. This is an unrecoverable seek error. Unrecoverable seek errors are classified as failures for MTBF calculations. Refer to the SCSI Interface Product Manual, part number 75789509, for Request Sense information. Reliability and service You can enhance the reliability of Cheetah 36XL disc drives by ensuring that the drive receives adequate cool- ing.
Case 4 - Current I/O process allowed during insertion or removal, except on the device being changed Seagate Cheetah 36XL disc drives support all four hot plugging cases. Provision shall be made by the system such that a device being inserted makes power and ground connections prior to the connection of any device signal contact to the bus.
The process of measuring off-line attributes and saving data can be forced by the RTZ command. Forcing S.M.A.R.T. will reset the timer so that the next scheduled interrupt will be two hours. The drive can be interrogated by the host to determine the time remaining before the next scheduled measure- ment and data logging process will occur.
DST. It is the responsibility of the host application to determine the “not ready” cause. While not technically part of DST, a Not Ready condition also qualifies the drive to be returned to Seagate as a failed drive.
Seagate’s option and at no charge to customer, if returned by customer at cus- tomer’s expense to Seagate’s designated facility in accordance with Seagate’s warranty procedure. Seagate will pay for transporting the repair or replacement item to customer.
Page 31
Cheetah 36XL Product Manual, Rev. E Seagate repair centers may refuse receipt of components improperly packaged or obviously damaged in tran- sit. Contact your Authorized Seagate Distributor to purchase additional boxes. Seagate recommends shipping by an air-ride carrier experienced in handling computer equipment.
Physical/electrical specifications This section provides information relating to the physical and electrical characteristics of the Cheetah 36XL drive. AC power requirements None. DC power requirements The voltage and current requirements for a single drive are shown in the following table. Values indicated apply at the drive power connector.
6.2.1 Conducted noise immunity Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 MHz. Maximum allowed noise values given below are peak to peak measurements and apply at the drive power con- nector.
+12 Volt Current during spindle start – Typical Amperes Figure 3. Typical ST336705 drive +12 V current profile +5 Volt Current during spindle start – Typical Amperes Figure 4. Typical ST318405 drive +12 V current profile AC Envelope Nominal (average) DC curve Seconds AC Envelope Nominal (average) DC curve...
+12 Volt Current during spindle start – Typical Amperes Figure 5. Typical ST39205 drive +12 V current profile +5 Volt Current during spindle start – Typical Amperes Figure 6. Typical ST336705 drive +5 V current profile AC Envelope Nominal (average) DC curve Seconds AC Envelope Nominal (average) DC curve...
+12 Volt Current during spindle start – Typical Amperes Figure 7. TypicalST318405 drive +5 V current profile +5 Volt Current during spindle start – Typical Amperes Figure 8. TypicalST39205 drive +5 V current profile AC Envelope Seconds AC Envelope Nominal (average) DC curve Seconds Nominal (average) DC curve...
Power dissipation ST336705 For drives using single-ended interface circuits, typical power dissipation under idle conditions is 9.6 watts (32.8 BTUs per hour). For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 9.6 watts (32.8 BTUs per hour). To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see Figures 9).
ST318405 For drives using single-ended interface circuits, typical power dissipation under idle conditions is 8.0 watts (27.3 BTUs per hour). For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 8.0 watts (27.3 BTUs per hour). To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see Figures 10).
ST39205 For drives using single-ended interface circuits, typical power dissipation under idle conditions is 7.5 watts (25.6 BTUs per hour). For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 7.5 watts (25.6 BTUs per hour). To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see Figures 10).
Location of HDA Temperature Check Point b. Non-operating –40° to 158°F (–40° to 70°C) package ambient with a maximum gradient of 36°F (20°C) per hour. This specification assumes that the drive is packaged in the shipping container designed by Seagate for use with drive. 6.4.2 Relative humidity The values below assume that no condensation on the drive occurs.
Page 42
>600 cu in (>9,800 cu cm) Drives packaged in single or multipacks with a gross weight of 20 pounds (8.95 kg) or less by Seagate for general freight shipment shall withstand a drop test from 48 inches (1,070 mm) against a concrete floor or equivalent.
There will not be any discrete tones more than 10 dB above the masking noise on typical drives when mea- sured according to Seagate specification 30553-001. There will not be any tones more than 24 dB above the masking noise on any drive.
Mechanical specifications The following nominal dimensions are exclusive of the decorative front panel accessory. However, dimensions of the front panel are shown in figure below. Refer to Figures 14 and 15 for detailed mounting configuration dimensions. See Section 8.4, “Drive mounting.” Height: 1.000 in Width:...
Figure 15. LC mounting configuration dimensions Notes: Mounting holes are 6-32 UNC 2B, three -Z- -X- on each side and four on the bottom. Max screw penetration into side of drive is 0.15 in. (3.81 mm). Max screw tightening torque is 6.0 in-lb (3.32 nm) with minimum full thread engagement of 0.12 in.
Defect and error management The drive, as delivered, complies with this specification. The read error rate and specified storage capacity are not dependent upon use of defect management routines by the host (initiator). Defect and error management in the SCSI system involves the drive internal defect/error management and SCSI systems error considerations (errors in communications between Initiator and the drive).
Table 3: Read and write retry count maximum recovery times [1] Read retry Maximum recovery time per count [1] LBA (cumulative, msec) 11 (default) 1569 These values are subject to change. Setting these retry counts to a value below the default setting could result in an increased unrecovered error rate which may exceed the value given in this product manual.
• Installation instructions are provided by host system documentation or with any additionally purchased drive installation software. If necessary see Section 10 for Seagate support services telephone numbers. • Do not remove the manufacturer’s installed labels from the drive and do not cover with additional labels, as the manufacturer labels contain information required when servicing the product.
Drive Front Jumper Plug (enlarged to show detail) SCSI ID = 0 SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5 SCSI ID = 6 SCSI ID = 7 SCSI ID = 8 SCSI ID = 9 SCSI ID = 10...
Additional notes on these functions in section 8.1.2. Jumper Plug (enlarged to show detail) Figure 18. J2 option select header 8.1.1 Notes for figures 16, 17, and 18. Notes explaining the functions of the various jumpers on jumper header connectors J2, J5, and J6 are given here and in Section 8.1.2.
8.1.2 Function description jumper installation Jumper function description Forces drive to use single-ended I/O drivers/receivers only. Drive can operate on the interface in low voltage differential mode or single-ended, depend- ing on the voltage state of the I/O “DIFFSNS” line. Default is SE jumper not installed. Spindle starts immediately after power up - Default setting.
(F) is applied to the fourth point. Note. Before mounting the drive in any kind of 3.5-inch to 5.25-inch adapter frame, verify with Seagate Tech- nology that the drive can meet the shock and vibration specifications given herein while mounted in such an adapter frame.
No attempt is made to describe all of the minute details of conditions and constraints that must be considered by designers when designing a system in which this family of drives can properly operate. Seagate declares that the drives operate in accordance with the appropriate ANSI Standards referenced in various places herein, with exceptions as noted herein or in the Seagate SCSI Interface Product Manual , part number 75789509.
SCSI interface commands supported Table 5 following lists the SCSI interface commands that are supported by the drive. Cheetah 36XL Family drives can be changed back and forth between SCSI-1, SCSI-2, and SCSI-3 (Ultra160) modes using the Change Definition Command. OEM standard drives are shipped set to operate in Ultra160 mode. Table 5: Commands supported by Cheetah 36XL family drive Command name...
Page 57
Table 5: Commands supported by Cheetah 36XL family drive (Continued) Command name Mode sense Caching parameters page (08h) Control mode page (0Ah) Disconnect/reconnect (02h) Error recovery page (01h) Format page (03h) Information exceptions control page (1Ch) Notch and Partition Page (0Ch) Power condition page (1Ah) Rigid disc drive geometry page (04h) Unit attention page (00h)
Page 58
Table 5: Commands supported by Cheetah 36XL family drive (Continued) Command name Supported diagnostics pages (00h) Translate page (40h) Set limits Start unit/stop unit (spindle ceases rotating) (1Ch) Synchronize cache Test unit ready Verify BYTCHK bit Write Write and verify DPO bit Write buffer (modes 0, 2, supported) Firmware download option...
Table 6 lists the Standard Inquiry command data that the drive should return to the initiator per the format given in the SCSI Interface Product Manual, part number 75789509, Inquiry command section. Table 6: Cheetah 36XL family drive Standard Inquiry data Bytes Data (HEX) 0-15...
Page 60
Current values are volatile values currently being used by the drive to control its operation. A Mode Select com- mand can be used to change these values (only those that are changeable). Originally, they are installed from saved or default values after a power on reset, hard reset, or Bus Device Reset message. Changeable values form a bit mask, stored in nonvolatile memory, that dictates which of the current values and saved values can be changed by a Mode Select command.
Page 61
Table 7: Mode sense data, ST336705 values Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 Mode Sense Data 00 A2 00 10 00 00 00 08 04 45 DC CA 00 Mode <------------------------------Mode Page Headers and Parameter Data Bytes----------------------------> Page 01 SAV 81 0A C0 0B F0 00 00 00 0F 00 FF FF...
Page 62
Cheetah 36XL Product Manual, Rev. E mode), the SCSI firmware is performance optimized for desktop applications. The firmware default condi- tion for the PM bit is set to one for Desktop mode. During the manufacturing process, the Saved value of the PM bit remains set to the firmware default condition (one) for drives with the LW interface.
Page 63
Table 8: Mode sense data, ST318405 values Bytes 03 04 05 06 07 08 09 10 11 12 Mode Sense Data 10 00 00 00 08 02 22 EE 56 00 Mode <------------------------------Mode Page Headers and Parameter Data Bytes----------------------------> Page 01 SAV 0B F0 00 00 00 0F 00 FF FF 01 DEF...
Page 64
Cheetah 36XL Product Manual, Rev. E mode), the SCSI firmware is performance optimized for desktop applications. The firmware default condi- tion for the PM bit is set to one for Desktop mode. During the manufacturing process, the Saved value of the PM bit remains set to the firmware default condition (one) for drives with the LW interface.
Page 65
Table 9: Mode sense data, ST39205 values Bytes 03 04 05 06 07 08 09 10 11 12 Mode Sense Data 10 00 00 00 08 01 11 77 2B 00 Mode <------------------------------Mode Page Headers and Parameter Data Bytes----------------------------> Page 01 SAV 0B F0 00 00 00 0F 00 FF FF 01 DEF...
Page 66
Cheetah 36XL Product Manual, Rev. E mode), the SCSI firmware is performance optimized for desktop applications. The firmware default condi- tion for the PM bit is set to one for Desktop mode. During the manufacturing process, the Saved value of the PM bit remains set to the firmware default condition (one) for drives with the LW interface.
SCSI bus conditions and miscellaneous features supported Asynchronous SCSI bus conditions supported by the drive are listed below. These conditions cause the SCSI device to perform certain actions and can alter the SCSI bus phase sequence. Other miscellaneous operating features supported are also listed here. Refer to the SCSI Interface Product Manual, part number 75789509, for details.
Details of the physical, electrical and logical characteristics are given in sections following, while the SCSI operational aspects of Seagate drive interfaces are given in the SCSI Interface Product Manual , part number 75789509. 9.6.1...
9.6.2 SCSI interface physical description The drive models described by this product manual support the physical interface requirements of the Ultra160 SCSI Parallel Interface-3 (SPI-3) standards as defined in American National Standard document X3T10/1302D revision 14, and operate compatibly at the interface with devices that support earlier SCSI-2 and SCSI-3 stan- dards.
To minimize discontinuances and signal reflections, cables of different impedances should not be used in the same bus. Implementations may require trade-offs in shielding effectiveness, cable length, number of loads and spacing, transfer rates, and cost to achieve satisfactory system operation. If shielded and unshielded cables are mixed within the same SCSI bus, the effect of impedance mismatch must be carefully considered.
94-0680-02-1 Amp US P/N: 2-557103-2 94-0680-02-2 Amp Japan P/N: 5-175475-9 Right-angle to PCBA connectors Seagate P/N: 77678559 For additional information call Amp FAX service at 1-800-522-6752. “LW” Model Drive SCSI ID 1 SCSI ID 0 Closed end type 68-pin connector used. Terminators enabled.
Pin 1 62.15 (2.447) Housing Contact 0.50 (.020) M Y M (.012) Pin 1 Pin 41 Figure 23. Nonshielded 80 pin SCSI “SCA-2” connector, used on LC drives Grounding Pins 57.87 (2.278) –0.15 + .000 – .006 0.15 M Y M C L of Datum Y –Y–...
Page 75
Table 13: LW 68-conductor single-ended (SE) P cable signal/pin assignments [11] Note. A minus sign preceding a signal name indicates that signal is active low. Connector Signal contact name [1] number [3] TermPwr TermPwr Reserved Notes [ ]: See page following Table 16. Connector Cable conductor contact...
Page 76
Table 14: LW 68-conductor LVD P cable signal/pin assignments [11] Note. A minus sign preceding a signal name indicates that signal is active low. Connector Signal contact name [1] number [3] +DB12 +DB13 +DB14 +DB15 +DBP1 +DB0 +DB1 +DB2 +DB3 +DB4 +DB5 +DB6...
Page 77
Table 15: LC 80-pin single-ended (SE) I/O connector pin assignments [11] Note. A minus sign preceding a signal name indicates that signal is active low. Connector Signal contact name [1] number [3] 12 V CHARGE 12 V 12 V 12 V NC [10] NC [10] –DB11...
Page 78
Table 16: LC 80-pin single-ended (LVD) I/O connector pin assignments [11] Note. A minus sign preceding a signal name indicates that signal is active low. Connector Signal contact name [1] number [3] 12 V CHARGE 12 V 12 V 12 V NC [10] NC [10] –DB11...
Notes [ ] for tables 13 through 16. See Section 9.6.4.1 for detailed electrical characteristics of these signals. The conductor number refers to the conductor position when using 0.025-inch (0.635 mm) centerline flat ribbon cable. Other cables types may be used to implement equivalent contact assignments. Connector contacts are on 0.050 inch (1.27 mm) centers.
Output characteristics Each signal (V ) driven by LVD interface drivers shall have the following output characteristics when measured at the disc drive connector: Steady state Low level output voltage* = –.95 V = < V Steady state High level output voltage* = –.95 V = < V Differential voltage = +0.6 V minimum with common-mode voltage ranges 0.700 V = <...
9.7.1.1 Single-ended drivers/receivers The maximum total cable length allowed with drives using single-ended I/O driver and receiver circuits depends on several factors. Table 17 lists the maximum lengths allowed for different configurations of drive usage. These values are from the SPI-3 document. All device I/O lines must have equal to or less than 25 pf capacitance to ground, measured at the beginning of the stub.
9.10 Disc drive SCSI timing Table 18: Disc drive SCSI timing Description Target Select Time (no Arbitration) Target Select Time (with Arbitration) Target Select to Command Target Select to MSG Out Identify MSG to Command Command to Status Command to Data (para. In) Command to Data (para.
Table 18: Disc drive SCSI timing (Continued) Description Data In Byte Transfer (parameter) Data Out Byte Transfer (parameter) Next Data In Byte Access (parameter) Next Data Out Byte Access (parameter) Data In Byte Transfer (media) [2] Data Out Byte Transfer (media) [2] Next Data In Byte access (media [2] Next Data Out Byte access (media [2] MSG IN Byte Transfer...
FAX 24 hours daily. Presales Support Presales Support Our Presales Support staff can help you determine which Seagate products are best suited for your specific application or computer system. Technical Support If you need help installing your drive, consult your dealer. Dealers are familiar with their unique system configu- rations and can help you with system conflicts and other technical issues.
Page 86
Customer Service (CSO) Warranty Service Seagate offers worldwide customer support for Seagate drives. Seagate direct OEM, Distribution and System Integrator customers should contact their Seagate service center representative for warranty information. Other customers should contact their place of purchase. Authorized Service Centers If you live outside the US, you can contact an Authorized Service Center for service.
Page 87
Spain 900-98 31 24 Sweden 0 207 90 073 Switzerland 0 800-83 84 11 Turkey 00 800-31 92 91 40 United Kingdom 0 800-783 5177 Fax Services—All European Countries Presales/Technical Support/Warranty Service Africa/Middle East Support Services For presales, technical support, warranty service and FAX services in Africa and the Middle East, dial our European call center at +31-20-316-7222 from 8:30 Friday, or send a FAX to +31-20-653-3513.
Need help?
Do you have a question about the ST318405LW/LC and is the answer not in the manual?
Questions and answers