Chapter 1. Overview - IBM 4690 User Manual

Chapter 1. Overview

The operating system provides support for the following tape drives:
v EIDE Internal
v SCSI Internal
v SCSI External
Refer to the IBM 4690 OS V2: User's Guide for more information on using the
Streaming Tape Drive Utility.
The following table shows the tape drives supported.
Name
IBM 4.0/8.0GB TR4 Internal
EIDE Tape Drive
Seagate ATAPI TapeStor
8000
IBM TR-4 4.0/8.0 GB
Internal SCSI Tape Drive
IBM TR-4 4.0/8.0 GB
External SCSI Tape Drive
TapeStor 8000 TR-4 4-8 GB
Internal SCSI Tape Drive
TapeStore 8000 TR-4 4-8 GB
External SCSI Tape Drive
Tape Capacity
Low cost
High Speed Data Transfer
Buffered Data to Maintain Streaming
© Copyright IBM Corp. 1998
Manufacturer
Options by IBM
Seagate Technologies,
Inc.
Options by IBM
Options by IBM
Seagate Technologies,
Inc.
Seagate Technologies,
Inc.
A Travan TR-4 cartridge can store up to 4 GB of uncompressed data.
However, the actual capacity per cartridge varies according to the number
and size of the files to be stored. Because the Travan TR-4 cartridge is
designed to store data from an entire hard disk, under normal conditions
you should not need to insert a second tape. The large storage capacity
allows the tape drive to be used in unattended mode (Remote Command
Processor), which is a significant advantage over tape drives that have
smaller capacities and require user intervention to change tapes.
Because only one cartridge is needed for most system backups, you save
on tape cartridge cost. One Travan TR-4 cartridge may be cheaper than
multiple smaller capacity tapes.
The tape drive is capable of transferring raw data at 600 KB per second.
Part of this data, Error Correction Code (ECC) data, is used to recover
from read errors. The resulting throughput should be about 30 MB per
minute when the tape drive is able to maintain streaming.
The tape drive's RAM allows buffering of data in the hardware. The
software in the Store Controller also has a buffer. With buffering in the
hardware and the software, the number of underruns should be reduced.
Model Number Part Number
2359 06H9720
TST8000R-ABET
06H9716
3502-900
TST8000R-SBET
TST8000E-SBET
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