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Cables
_______________________________ _________________________
| | | | |
| FC | Cable Length | P/N | Description |
|______|______________|_________|_________________________|
| | | | |
| 5106 | 0.6 meter | 05H4644 | Device-to-device |
| 5128 | 2.8 meter | 05H4647 | Device-to-host |
| 5134 | 3.4 meter | 05H4645 | Device-to-device |
| 5138 | 4.0 meter | 05H4646 | Device-to-device |
| 5145 | 4.5 meter | 05H4648 | Device-to-host |
| 5112 | 12.0 meter | 05H4649 | Device-to-host |
| 5118 | 18.0 meter | 05H4650 | Device-to-host |
|______|______________|_________|_________________________|
Data Cartridge....... 05H4434
Cleaner Cartridge.... 05H4435
Cartridge Magazine... 39F4762
Model B11 has automatic cartridge ficility (ACF)
Model B11 and B1A support the IBM 3590 High Performance Cartridge Tape
1/2-inch formatted cartridges in read and write mode.
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Model B11
- 3590 tape drive with an ACF
- Integrated controller
- 2 SCSI-2 Diff F/W adapter ports
- Supports a RS/6000 or SP2 ina 7202 rack, 7015-R00 rack or customer-
provided rack.
- Up to 4 Model B11 drives per 7202, 7015-R00
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Model B1A
- 3590 tape drive without ACF
- Integrated controller
- 2 SCSI-2 Diff F/W adapter ports
- Installs in a 3494 Tape Library Dataserver.
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3590 Summary of Characteristics
Display Panel Specifications
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Media 3590 High Performance Cartridge Tape
Cartridge Loader 10-cartridge capacity ACF
Data Capacity 10GB per uncompacted cartridge
Device Data Rate 9MB per second
Data Transfer Rate 17MB per second via ESCON
(Maximum) 20MB per second via SCSI
Data Search Rate 166MB per second
Tape Speed 2 meters (79 inches) per second
Search/Rewind Speed 5 meters
Average Cartridge Load Time 16 seconds
Full Cartridge Rewind Time 2 seconds
Maximum Cartridge Rewind Time 60 Seconds
Compression and Block Size considerations:
( I will review the following information as new information arrive.
Let me know of any important example on this subject. )
From the results of searches, it seems to be a loss of time to have both
software and hardware compression. It's one or the other.
The 3590 tape drive has a parameter for hardware compression in the
characteristics of the tape drive ( smit ). It is suggested to disable
software compression in the command used for backup ( software compression ).
Example: savevg has a -p flag to disable software compression since AIX 4.2
ADSM:
I have talked to ADSM support and they also suggests to disable software
compression in the ADSM backup on a 3590.
This is not a absolute recommendation. The ADSM support told me that if a
ADSM client has a faster CPU and memory than the ADSM server, it would be
better to set software compression. Software compression being done by the
client while hardware compression is done by the server ( the one that own
Atape ).