[NTLUG:Discuss] Best SCSI RAID for Linux

[Preston Hagar]

At the company I work for, we have had a lot of trouble using various
Adaptec SCSI Raid cards that use the aacraid driver.  Our problem
began when we got a server from Dell.  Basically (if I remember the
problem correctly), during heavy disk access the card can time out and
basically go to sleep and quit out on you. (That isn't the exact
technical description of the problem, just a paraphrase of what I can
remember See this bug report:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=92129 )  I have
seen the issue blamed on everything from firmware on the cards and/or
drives themselves to the aacraid implementation.  We saw this issue
with the Dell Perc 4/Di (which is basically a rebranded Adaptec card)
and the Adaptec 2200.
  
On the other hand, we have had great success with LSI MegaRaid cards
and that is now almost exclusively what we use.  Performance is great
(although we have never done any official benchmarks, it is just one
of those "it feels fast" things) and we have never had any
compatibility issues with the driver in the 2.4 or 2.6 kernels.  The
way we finally solved our Dell server issue was to get them to send us
an LSI card.  Ever since we put it in, we haven't had a single problem
with that server.  Hope that helps.

Preston


On Tue, 07 Dec 2004 16:00:18 -0600, Stuart Johnston <saj at thecommune.net> wrote:
> To complement the recent discussion of IDE raid options, I was hoping to
> get some opinions on the best SCSI RAID controllers for Linux.  Most of
> my experience has been with aacraid devices with which I have been
> pretty unimpressed, particularly after reading about 3Ware's DiskManager
> software.
> 
> Thanks for your comments,
> Stuart Johnston
> 
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