VS6230 RAID, 05-10-03

(pics are clickable for larger versions)

©2003 by Thomas Junker ALL RIGHTS RESERVED

NOTE: This is NOT part of the Intelligent Peripherals website. They used the thumbnail of my VS6000 RAID-enhanced server without permission. But since they did, you may as well know that you are now viewing a page in The Unofficial Wang VS Information Center, operated by Thomas Junker, the foremost independent VS consultant in the world today and the foremost independent expert on the use of host-independent RAID technology with VS systems.


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VS6230 with integrated RAID.
 
The RAID controller is at the left, an Infortrend IFT-3102UG:
  • Ultra-Wide (40 MB/sec per channel)
  • 64 MB cache installed; 128 MB possible
  • Four channels on main board, two presently in use
  • Four additional channels can be added via daughterboard
  • Any channel can be Host or Drive type
  • Controller active board replaceable through front panel
  • Optional internal battery mounts inside
  • Optional external battery mounts in a drive tray
Standard VS cartridge tape and diskette drives (visible here) and a standard VS IPL drive (see next picture) are retained for maximum compatibility with VS norms.

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Rear view from above, top cover removed
 
The RAID controller is visible at the top right.
 
The light-colored square object in the left three rear bays is an Enlight EN-8700. It holds five hot-swap SCA drives.
 
The familiar object in the second rear bay from the right is a Wang tray containing the IPL drive, retained for maximum compatibility.
 
At the far right the RAID's serial cable is visible, a DB9M not yet mounted. It could be mounted in the IPL drive's tray bezel or in the bezel of a tray of its own.

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Rear view
 
Five-drive cage at the left, IPL drive medium right.
 
The 68-pin SCSI cable connecting the drive cage to the RAID controller is visible deep in the empty bay at the right.

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Rear view from above,
RAID cage exposed

 
The cover has been removed from the five-drive cage at the left. Visible in the cage are the five hot-swap SCA drives.
 
The drive cage has its own fan.

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Rear view,
RAID cage exposed

 
Drive cage cover removed.
 
The five hot-swap drives are:
  • IBM DNES-309170S
  • 9.1 GB
  • 7200 RPM
  • LVD/SE
  • 2 MB buffer
  • 80-pin SCA (Single Connector Attachment)
These drives are configured in the RAID controller into a single RAID5 logical drive of about 35 GB. If any single drive fails it can be replaced and rebuilt without interrupting the operation of the system.
 
The 35 GB logical drive is partitioned into VS-size pieces.

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VS Disks screen
 
Volume "VS6000" is the physical IPL drive.
 
All other drives are virtual, partitioned from one large RAID5 array and prepared for use with DISKINIT INITIALIZE. The VS "drives" that reside in RAID are fault tolerant.

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The partitions
 
This is the RAID management view of the partitions that provide the virtual VS drives to the VS RCU SCSI port. Partitions are sized in "true MB" and provide the sizes required by the VS.
 
The "Names" shown are only for RAID management purposes. The RAID knows nothing about the VS volume structure in those partitions. The unnamed partitions are not in use but any of them could be mapped to a SCSI ID in place of any of the named partitions. They represent 796 MB of unused space that could be partitioned into three IPL-size units and used as hidden backups of up to three different IPL volume configurations or OS versions.