|Julien Vehent on 14 Jun 2011 04:37:44 -0700|
[Date Prev] [Date Next] [Thread Prev] [Thread Next] [Date Index] [Thread Index]
|Re: [PLUG] Hot-swapping Linux RAID1 (was Re: Computer case)|
On Tue, 14 Jun 2011 00:01:18 -0400, JP Vossen wrote:
On 06/13/2011 12:51 PM, email@example.com wrote:Date: Mon, 13 Jun 2011 12:51:46 -0400 From: Julien Vehent<firstname.lastname@example.org>I've never tried hot swapping sata drives used in a linux soft raid.Might be an interesting experience though:)I have not tried this, but I'd *guess* that if you use 'mdadm' appropriately, it would be fine. YMMV! Before: mdadm --manage $RAID --fail $DISK mdadm --manage $RAID --remove $DISK After hot-swap: sfdisk -d $GOOD_DISK | sfdisk $BAD_DISK mdadm --manage $RAID --add $DISK One of the tricks is to get "$RAID" & "$DISK" right. 'cat /proc/mdstat' can help. And you may need to loop though the mdadm commands if you've got multiples of anything.See http://www.kernelhardware.org/replacing-failed-raid-drive/ for more info.Let us know if this works, :-) JP
I didn't know of 'sfdisk', that was the missing piece: dumping the partitions table and recreating it on the new drive. With that, I don't know why it wouldn't work. I will give it a shot with a spare drive (that doesn't have the same geometry) and let you know.
I traded my 2*3.5" for 2*3.5", both 500GB and 7200rpm as well, for just $10 difference per drive. Not too bad of a deal :) However, it seems that the small drives consume as much as the big one. I was expecting some saving there.
Julien ___________________________________________________________________________ Philadelphia Linux Users Group -- http://www.phillylinux.org Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug