3590
Requires the Atape device driver

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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
      ------------------------------------------------------------
      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 ).