Re: moving from plain SCSI to Hardware Raid, possible ?

From: Ron Johnson (ron.l.johnson_at_cox.net)
Date: 10/24/04

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    To: Debian-User <debian-user@lists.debian.org>
Date: Sun, 24 Oct 2004 01:15:26 -0500

    On Sun, 2004-10-24 at 14:11 +1000, Ross Tsolakidis wrote:
    > Hi all,
    >
    > We have a few servers in production which have a couple of SCSI hard
    > disks.
    > Currently only using one of them. The 2nd just houses some data as a
    > backup.
    > We're not really interested in going down the software RAID path, much
    > prefer hardware RAID.
    >
    > Anyways we have a few Adaptec 2110S Single channel RAID cards floating
    > around that we could use.
    >
    > The issue is:
    > We really don't want to rebuild the servers from scratch.
    >
    > Unfortunately I've never done anything like this, everytime you create
    > a Raid set in Hardware, you initialize/wipe the disks afaik.
    >
    > Has anyone ever successfully done this type of thing ?
    > Can you give me a bit of a description on how you did it ?
    > Also I'd be interested to hear anyone's theory on how it could be
    > done.

    Since the on-disk structure of JBOD, RAID-0, RAID-3, RAID-5,
    RAID-0+1, RAID-1+0, RAID-10, etc, etc are all different, you have
    to wipe the disks.

    If the OS is on a separate disk from the data (including /home),
    you won't have to rebuild the server, "just" the data disks. You
    have a reliable tape drive, and you've tested the reliability of
    your backups, right? 

    -- 
-----------------------------------------------------------------
Ron Johnson, Jr.
Jefferson, LA USA
PGP Key ID 8834C06B
"Bureaucracy defends the status quo long past the time when the
quo has lost its status."
Laurence J. Peter



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