From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Wed,  3 Sep 1997 00:01:02 -0400
From: jmk@plan9.bell-labs.com jmk@plan9.bell-labs.com
Subject: [9fans] alternative SCSI controller
Topicbox-Message-UUID: 616a9f50-eac8-11e9-9e20-41e7f4b1d025
Message-ID: <19970903040102.nkM-Lb_P-oNpdmbgp2ALWFGrGrCRtOTLopc91tWJtwQ@z>

I've added the following to CHANGES.txt on the web site.
Thanks to Mark and DPT for their support.


02-Sep-97 9/contrib/dpt
=======================
This is a clarification from Mark Salyzyn (dpt.com!salyzyn_mark) of the
hardware supported by the DPT driver:

All the PCI cards made by DPT will work with this driver. These cards include
the PM2024, PM2124, PM2044, PM2144, PM3224 and PM3334. RAID and Cache
support is part of the firmware of the card and needs no driver support
to utilize these features. The PM3334 supports, with the appropriately
wired backplane, HOT target swapping (for RAID arrays).

The add-on features supported by the DPT controller card and Plan 9 driver
include:
1) Up to 64MB of configurable cache.
2) Firmware RAID-0 (striping), RAID-1 (mirroring) and RAID-5 (multi-
   drive redundant arrays of up to 18 drives each).
3) Hot Swapping of targets in RAID-1 and RAID-5 arrays, with
   appropriate hardware.
4) Hot Spares

The features not supported at this moment:
1) Command Queueing (? a driver/OS issue).
2) Passthrough (allowing native OS configuration and rebuilding of
   arrays).
3) Software RAID (striping of arrays across adapters).
4) Multichannel Cards (The PM3334 can support up to 3 wide SCSI
   channels).
5) Server-On-Call redundant server.

Sincerely -- Mark Salyzyn Senior Software Engineer
Distributed Processing Technology