Re: [CentOS] more software raid questions

2010-10-25 Thread Scott Silva
on 10-21-2010 9:13 AM fred smith spake the following: > On Thu, Oct 21, 2010 at 08:59:13AM -0700, Nataraj wrote: >> fred smith wrote: >>> On Tue, Oct 19, 2010 at 07:34:19PM -0700, Nataraj wrote: >>> I've seen this kind of thing happen when the autodetection stuff misbehaves. I'm

Re: [CentOS] more software raid questions

2010-10-21 Thread Nataraj
Nataraj wrote: > Nataraj wrote: > >> fred smith wrote: >> >> >>> Thanks for the additional information. >>> >>> I'll try backing up everything this weekend then will take a stab at it. >>> >>> someone said earlier that the differing raid superblocks were probably >>> the cause of the mis

Re: [CentOS] more software raid questions

2010-10-21 Thread Nataraj
Nataraj wrote: > fred smith wrote: > >> Thanks for the additional information. >> >> I'll try backing up everything this weekend then will take a stab at it. >> >> someone said earlier that the differing raid superblocks were probably >> the cause of the misassignment in the first place. but I h

Re: [CentOS] more software raid questions

2010-10-21 Thread Nataraj
fred smith wrote: > > Thanks for the additional information. > > I'll try backing up everything this weekend then will take a stab at it. > > someone said earlier that the differing raid superblocks were probably > the cause of the misassignment in the first place. but I have no clue > how the supe

Re: [CentOS] more software raid questions

2010-10-21 Thread fred smith
On Thu, Oct 21, 2010 at 08:59:13AM -0700, Nataraj wrote: > fred smith wrote: > > On Tue, Oct 19, 2010 at 07:34:19PM -0700, Nataraj wrote: > > > >> > >> I've seen this kind of thing happen when the autodetection stuff > >> misbehaves. I'm not sure why it does this or how to prevent it. Anyway,

Re: [CentOS] more software raid questions

2010-10-21 Thread Nataraj
fred smith wrote: > On Tue, Oct 19, 2010 at 07:34:19PM -0700, Nataraj wrote: > >> >> I've seen this kind of thing happen when the autodetection stuff >> misbehaves. I'm not sure why it does this or how to prevent it. Anyway, >> to recover, I would use something like: >> >> mdadm --stop /dev/md

Re: [CentOS] more software raid questions

2010-10-20 Thread Rob Kampen
Rudi Ahlers wrote: On Wed, Oct 20, 2010 at 4:34 AM, Nataraj wrote: When I create my Raid arrays, I always use the option --bitmap=internal. With this option set, a bitmap is used to keep track of which pages on the drive are out of date and then you only resync pages which need updating inst

Re: [CentOS] more software raid questions

2010-10-20 Thread Rudi Ahlers
On Wed, Oct 20, 2010 at 4:34 AM, Nataraj wrote: > When I create my Raid arrays, I always use the option --bitmap=internal. > With this option set, a bitmap is used to keep track of which pages on > the drive are out of date and then you only resync pages which need > updating instead of recopying

Re: [CentOS] more software raid questions

2010-10-20 Thread Rob Kampen
fred smith wrote: On Tue, Oct 19, 2010 at 07:34:19PM -0700, Nataraj wrote: fred smith wrote:helppain/backups/disks/ Well, I've already tried to use --fail and --remove on md125 and md126 but I'm told the members are still active. mdadm /dev/md126 --fail /dev/sdb1 --r

Re: [CentOS] more software raid questions

2010-10-20 Thread fred smith
On Tue, Oct 19, 2010 at 07:34:19PM -0700, Nataraj wrote: > fred smith wrote:helppain/backups/disks/ > > hi all! > > > > back in Aug several of you assisted me in solving a problem where one > > of my drives had dropped out of (or been kicked out of) the raid1 array. > > > > something vaguely simila

Re: [CentOS] more software raid questions

2010-10-19 Thread Nataraj
Nataraj wrote: > > I've seen this kind of thing happen when the autodetection stuff > misbehaves. I'm not sure why it does this or how to prevent it. Anyway, > to recover, I would use something like: > > mdadm --stop /dev/md125 > mdadm --stop /dev/md126 > > If for some reason the above commands f

Re: [CentOS] more software raid questions

2010-10-19 Thread Nataraj
fred smith wrote:helppain/backups/disks/ > hi all! > > back in Aug several of you assisted me in solving a problem where one > of my drives had dropped out of (or been kicked out of) the raid1 array. > > something vaguely similar appears to have happened just a few mins ago, > upon rebooting after

Re: [CentOS] more software raid questions

2010-10-19 Thread Tom H
On Tue, Oct 19, 2010 at 7:59 PM, fred smith wrote: > > back in Aug several of you assisted me in solving a problem where one > of my drives had dropped out of (or been kicked out of) the raid1 array. > > something vaguely similar appears to have happened just a few mins ago, > upon rebooting after

Re: [CentOS] more software raid questions

2010-10-19 Thread Rob Kampen
fred smith wrote: hi all! back in Aug several of you assisted me in solving a problem where one of my drives had dropped out of (or been kicked out of) the raid1 array. something vaguely similar appears to have happened just a few mins ago, upon rebooting after a small update. I received four e

[CentOS] more software raid questions

2010-10-19 Thread fred smith
hi all! back in Aug several of you assisted me in solving a problem where one of my drives had dropped out of (or been kicked out of) the raid1 array. something vaguely similar appears to have happened just a few mins ago, upon rebooting after a small update. I received four emails like this, one