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Date:      Wed, 14 Mar 2001 23:26:08 -0600
From:      "J. Seth Henry" <jshenry@net-noise.com>
To:        "FreeBSD Questions" <freebsd-questions@FreeBSD.ORG>
Subject:   Vinum disk replacement
Message-ID:  <EBEDLIEDDOIIJDGEKFFDGEMBCAAA.jshenry@net-noise.com>

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Ok, does anyone know the proper way to replace a drive in a vinum RAID5
array? I thought I did, but apparently not.

I tried pulling the disk, replacing it with another disk having the same
SCSI ID, and creating a label for it - ala the vinum web page. (this is
after partitioning and changing the partition type with disklabel). When I
start vinum, it shows the RAID5 plex as degraded, and the affected disk as
down. So far, so good - the file system is slow, but fine. Next, I init the
plex, using "init mmvolc.p0.s2". Ok, so how do I rebuild parity from here? I
try starting the plex, and it comes up. No rebuilding parity, nothing. but
when I try to mount the file system, it is trashed. (presumably because one
of the disks is full of zeros!).

I tried the step by step on the website, but it didn't work. Could someone
give me some pointers on how to replace a faulty disk? Fortunately, I have
backups of all the data - so I was able to fix these problems with newfs,
and just restore - but that is a PITA, especially since I built the array to
avoid having to do this just for a single disk failure.

Thanks,
Seth Henry
jshenry@net-noise.com


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