predicted failure of disk in raid10 array

[Michael_Christensen2 at Dell.com]

Message: 2
Date: Tue, 05 Feb 2008 11:50:49 +0000
From: Campbell McLeay <campbell.mcleay at hostway.co.uk>
Subject: predicted failure of disk in raid10 array
To: Linux-PowerEdge at dell.com
Message-ID: <47A84D99.1050509 at hostway.co.uk>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hi,

We have one disk that is reporting 'predicted failure' in a raid 10 
array. I assume that it is still participating in the array. Is it worth

trying to offline it and then online it again (or is this dangerous), to

see if comes back, or is it just better to offline it and replace it? Or

should it just be left until it fails?

Kind regards,

Campbell



Do NOT force the disk online!! This is only done as a last resort and
only in special cases. If you do it in this case, you will get corrupted
data.
This particular HDD needs to be replaced as the predictive errors are
logged on the drive itself and rebuilds and firmware updates won't fix
it.

Get the drive replaced and when the rebuild is done and the array
(virtual disk) is okay, update raid controller firmware + driver and
firmware on the remaining 3 HDD's.

Below you will find links to both SAS/SATA and SCSI HDD's firmware
update CD's (You didn't mention what drives or server you have, so I
included both)

Dell SAS Hard Drive Firmware Utility, SATA Hard Drive Firmware Utility,
Utility, English, Multi System, v.SAS_SATA, A05
http://support.euro.dell.com/support/downloads/download.aspx?fileid=2388
53


Dell SCSI Hard Drive Firmware Utility, Utility, English, Multi System,
A08
http://support.dell.com/support/downloads/download.aspx?fileid=220030

Note: you need access to a Windows machine to use the tool - it creates
bootable CD's, floppies, USB keys or images for PXE servers.

//Michael