[luau]Hardware Recommendations for LTSP

[Warren Togami]

You are absolutely right.  SCSI RAID is for pure performance, but IDE RAID
has a much better price/storage/performance ratio.

That's how these guys can make a RAID 5, hotswap,1 TeraByte NAS appliance
for only $20,850.
http://www.raidzone.com
This box is SWEET.  They engineered it so that each IDE disk has its own
channel, and the disks are hotswappable.  It runs Reiserfs with a high speed
solid stage storage disk (some type of flash) for the journal.

----- Original Message -----
From: "Dusty" <dusty at sandust.com>
To: "Linux & Unix Advocates & Users" <luau at list.luau.hi.net>
Sent: Wednesday, May 09, 2001 5:54 PM
Subject: [luau] Re: [luau]Hardware Recommendations for LTSP

> I haven't read through his numbers very much yet, but he seems happy with
his IDE raid arrays.  I found several comparison that said SCSI is much
better than IDE in raid configurations, but they did not offer any
performance numbers. With IDE you get a lot of disk space with okay
performance.  The performance proble is in teh design of the bus.  IDE was
only designed for one device per channel.  You can put two devices per
chanel, but the share that channel.  If one disk is working the other is
idle.  SCSI on teh other hand is designed for multiple disks per channel (I
think up to 36, but most scsi controllers are 7).  All of those devices have
dedicated bandwidth on the channel.  And in SCSI all disks can be access at
the same time unlike IDE.