[rhn-users] Raid repair

[Jon Branch]

Hi Lonnie

Instead of using raidtools could you have tried using mdadm to force your raid 5 to start?

mdadm is documented in "Managing RAID on Linux" by Derek Vadala from O'Reilly.

Regards

Jon Branch
IT Coordinator
Christian Alliance International School - Hong Kong

----- Original Message -----
From: "LONNIE TROTTER" <ltrotter at ajusd.org>
Date: Tue, 30 Mar 2004 10:17:22 -0700
To: rhn-users at redhat.com
Subject: [rhn-users] Raid repair

> Has anyone experienced this. 
> 
>    We had a server setup with physical space for six scsi hard drives. 
> The first three were constructed as a RAID1 array while the last three 
> were constructed as a RAID5 array. One of the drives in the RAID5 array 
> failed and was not repairable. The failed drive was removed and a 
> replacement drive put in its place, we booted into linux rescue and 
> fdsik'd the drive creating a partition table exactly the same as the 
> drive that had failed. Went to boot back in to Enterprise to raidhotadd 
> the replacement harddrive to the RAID5 array, but enterprise would not 
> let us do that. The RAID5 array would not start because there were only 
> two drives available, if the broken drive was placed back in the raid 
> would come up in degraded mode. The problem here is that we had no 
> physical space to have both the failed drive and the replacement drive in 
> at the same time. This meant that the raid would not start, preventing us 
> from raidhotadding the replacement drive. As a result we copied the data 
> off of the raid while it was in degraded mode, put the replacement drive 
> in and rebuilt the raid array, then copied the data back onto it. This 
> was quite time consuming as the data we were moving around was around 25 
> gigabytes. 
> 
> Lonnie Trotter
> Network Administrator
> Apache Junction Unified School District
> Phone: 480-982-1110 Ext. 2050
> 
> 
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