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Date:      Sun, 25 Mar 2001 11:57:27 +0100 (BST)
From:      Tim Joseph <tim@weeble.org.uk>
To:        <freebsd-questions@freebsd.org>
Subject:   Simple SCSI/RAID on FBSD 4.x
Message-ID:  <Pine.BSF.4.33.0103251148440.69306-100000@doubtful.weeble.foo.uk>

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Hi,

I'm looking to improve the I/O performance on my FreeBSD box, and the
twin thoughts of SCSI and RAID came to mind. I don't currently have a SCSI
controller, nor do I have any RAID experience.

My questions are:

1. Will software RAID 0 noticeably improve disk performance, even if all
of the disks are connected to the same controller? Is there a tailing off
of performance once you're past 2 or 3 disks on the same controller?

2. Will a hardware RAID controller be worth it for just RAID 0?

3. Which "width" of SCSI gives the best bang for buck performance?

4. Are most SCSI drives now of a particular type (eg UW)?

5. Can I RAID a couple of hardrives, and have a separate CDRW/DVD unit on
the same controller?

6. Any recommendations for SCSI controllers, RAID controllers and/or SCSI
disks?

Thanks.

From,

Tim


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