-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Dan Carl Sent: Friday, February 20, 2009 11:37 AM To: CentOS mailing list Subject: Re: [CentOS] Software Raid Recovery
Stephen Leonard Character wrote:
On Fri, Feb 20, 2009 at 3:15 PM, Stephen Leonard Character Stephen.Character@alorica.net wrote:
I have a server set up with 4hdd using software raid. I have /boot on
a
raid1 on md0 , / on raid5 on md1, and swap on raid0 on md2. If one of
my
drives die, how to I recover?
First, put the swap also on RAID1, you don't want part of your memory to become unavailable is a drive dies. Using RAID has no use then.
If a drive dies nothing will happen, your system will continue to
keep
running (if you put your swap on raid1 that is). But make sure you configure mdadm to send you a mail when that happens, so you know a drive is gone.
For recovery, just replace the disk, repartition it and re-add the partitions to the raid arrays and your are done. The disks will
resync
and then everything is back to how it was.
Regards, Tim
Thanks for the reply's, I'm assuming to do the repartitioning with
fdisk
or gparted to repartition, what tools do I use to manage the software raid? I.e. how do I go about changing the swap partition to raid1 and re-add the partitions to the array? This system is for me to practice
on
for my RHCT/E exams(too broke to pay for training) so I'm planning on breaking one of the drives(just remove it) and add a new one for practice.
Thanks in advance, Stephen
Right, first partition the new drive then add it back to the Raid like
this.
mdadm /dev/md1 -a /dev/sdc3 Then the raid will start rebuilding. As posted early having swap on a raid zero is a bad idea . Dan
So, to change my swap to raid1, I would need to unmount it, delete the md2 device, and rebuild it as a raid1 md2 device? ______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos