Hardware Recommendations for LTSP
Warren Togami
warren at togami.com
Wed May 9 20:19:17 PDT 2001
----- Original Message -----
From: "Steve" <steve at iwsys.com>
To: "Linux & Unix Advocates & Users" <luau at list.luau.hi.net>
Sent: Wednesday, May 09, 2001 2:26 PM
Subject: [luau] Re: Hardware Recommendations for LTSP
> Are you sure the cost savings over SCSI RAID are _really_ there? How much
> mass storage do you need? I bought 15 18GB U160 scsi drives on ebay for
> $130ea and then got a 64bit PCI AMI MegaRAID Elite 1600 for $350. The
nice
How often can you find that kind of great deal? We can't survive off of
Ebay for a steady stream of parts, when we need to make many of these
systems. Also we probably can't buy parts on Ebay with the DOE's bid and
procurement laws.
I suppose I should look at SCSI choices...
> RAID 5 does nothing to improve performance. It has to do a parity
> calculation and there is some overhead in this. SCSI RAID off loads this
> to the RAID controller CPU. I would think the cache on the controller
> would probably offset this loss. The memory interleaving of the AMI
> controllers would probably go even further to offsetting that. One last
> benefit of the SCSI solution is the MegaRAID driver is very well developed
> in linux.
>
Maybe I'm completely wrong about RAID 5. Anyway, I'm going to try it.
Anyone have anything against RAID 0 + 1?
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