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How to rebuild or replace a drive in a RAID5 array [closed]

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http://serverfault.com – I have a 4 scsi drives in a RAID 5 configuration and one of them has failed leaving the server in an interim recovery configuration. I have 2 more drives in the server that just show up as unassigned in the Array Configuration Utility. The failed drive has been marked as failed and replaced with one of the unassigned drives in the same slot but the replaced drive is not being rebuilt. My queries are how to get the replaced drive rebuilt or how to add an unassigned drive as a spare at this point as I dont see an option for Spare Management. Any help would be appreciated. Thanks in advance. (HowTos)

taskli's picture
Submitted by taskli on 01/01/2013

Stories similar to How to rebuild or replace a drive in a RAID5 array [closed]

I have 6 1tb drives in a RAID5. 1 drive went down. On the RAID was 2 virtual machines that I really need back up and running. The spare drive I have to put in the server is a 1.5tb drive, which exceeds the physical per drive limit of the 2020SA. The drive is found in the disk utility, but it is not found in the array management section. I cannot add the drive to the array to have it rebuild.

Quick info: Dell R410 with 2x500GB drives in RAID1 on H700 Adapter

Recently one of drives in RAID1 array on server failed, lets call it Drive 0. RAID controller marked it as fault and put it offline.

I have a RAID 5 array with 3 Disks:

/dev/sdb /dev/sdc /dev/sdd

Over last weekend i was prompted that SDD had failed. so replaced the drive, added it back into the array and let it rebuild (1.5TB)

It stopped at about 64% with an error, found out that /dev/sdb is failing as well.

I imaged SDD onto a new drive (ddrescue) and SDB onto a new drive (ddrescue).

So my experience with RAID is minimal. So I figured I'd come and ask here. We have a 16 drive RAID system that have 15 drives in RAID 5 with a hot spare left over. Recently one of the drives in the RAID was giving errors so I cloned it over to the hot spare and put a new drive in it's spot. I made the new drive the hot spare as I was told.

We have 8 300GB SAS drives in a RAID5 + Spare configuration. It seems data capacity planning came up a bit short and I need more disk space. Instead of replacing drives with 600 GB models, I would like to take the Spare drive and add back to the array. Is this posible with the HP ACU without reconfiguring the entire awway and losing data?

We have 8 300GB SAS drives in a RAID5 + Spare configuration. It seems data capacity planning came up a bit short and I need more disk space. Instead of replacing drives with 600 GB models, I would like to take the Spare drive and add back to the array. Is this posible with the HP ACU without reconfiguring the entire awway and losing data?

3 years ago a co-worker setup a software RAID-6 array on Ubuntu 9.04 and I'm getting messages from the OS that the drive has bad sectors and should be replaced.

So here is what I have currently:

8 SAS Drives total 6 Drives setup as RAID 5 as Virtual 1. 1 Drive setup as Hot Spare. 1 Drive in Ready state that is not part of the RAID and is not set as a hot spare.

Basically, everything on this server is setup on the RAID 5 as one virtual disk (OS, data, etc) and partitioned out. I want to separate things out a bit.

Importance of Spare in RAID 25 weeks 3 days ago

Background:

From http://en.wikipedia.org/wiki/RAID

Hot Spare is a drive physically installed in the array which is inactive until an active drive fails, when the system automatically replaces the failed drive with the spare, rebuilding the array with the spare drive included. This reduces the mean time to recovery (MTTR), but does not completely eliminate it.