On Mon, 7 May 2007, Jeffrey B. Layton wrote:
Justin Piszcz wrote:
On Mon, 7 May 2007, Jeffrey B. Layton wrote:
Justin Piszcz wrote:
On Mon, 7 May 2007, Jeffrey B. Layton wrote:
Hello,
I apologize if this is a FAQ question or a typical newbie question,
but by google efforts have yielded anything yet.
I built a RAID-1 using mdadm (Centos 4.2 with 2.6.16.19 kernel
and mdadm 1.6.0-2). It's just two SATA drives that I created using:
mdadm --create --verbose /dev/md1 --level=raid1 --raid-devices=2
/dev/sda1 /dev/sdb1
The md built correctly and I built an ext3 on it. I created
/etc/mdadm.conf
and modified /etc/fstab to mount the device. But when I reboot, the
kernel
drops into RAID repair mode because it can't seem to find /dev/md1 and
yells about not finding any valid superblock (I can get the exact
message
if needed). However I can mount /dev/sda1 with no problems.
The only way I can get md1 back is to issue the command:
mdadm -A /dev/md1 /dev/sda1 /dev/sdb1
and everything works. I want to have /dev/md1 mounted automatically
on boot. I'm missing something simple here - how do I do this?
Sounds like a udev issue and/or you did not create the mdadm.conf
properly. Show us your mdadm.conf.
ARRAY /dev/md1 level=raid1 num-devices=2
UUID=e235ee6c:415f1494:23c28b59:afd20140
devices=/dev/sda1,/dev/sdb1
ARRAY /dev/md0 level=raid1 num-devices=2
UUID=7121b438:7d36f9f6:8aa9c8b3:b5b0d211
devices=/dev/hdc1,/dev/hdd1
What distro?
CentOS 4.2. I've been reading something about raidautorun. Would help in this
case?
Thanks!
Jeff
That is probably what you want-- also technically you don't 'need' to have
the partitions set to 0xfd [Linux Raid Auto Detect], but that may help as
well.
fdisk -l /dev/sda
Disk /dev/sda: 74.3 GB, 74355769344 bytes
255 heads, 63 sectors/track, 9039 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 1 2090 16787893+ fd Linux raid autodetect
/dev/sda2 * 2091 2107 136552+ fd Linux raid autodetect
/dev/sda3 2108 9039 55681290 fd Linux raid autodetect
Justin.
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