Re: raid problem: after every reboot /dev/sdb1 is removed?

[Bill Davidsen <davidsen@tmr.com>]

Berni wrote:
> Hi!
>
> I have the following problem with my softraid (raid 1). I'm running
> Ubuntu 7.10 64bit with kernel 2.6.22-14-generic.
>
> After every reboot my first boot partition in md0 is not synchron. One
> of the disks (the sdb1) is removed. 
> After a resynch every partition is synching. But after a reboot the
> state is "removed". 
>
> The disks are new and both seagate 250gb with exactly the same partition table. 
>
>   
Did you create the raid arrays and then install on them? Or add them 
after the fact? I have seen this type of problem when the initrd doesn't 
start the array before pivotroot, usually because the raid capabilities 
aren't in the boot image. In that case rerunning grub and mkinitrd may help.

I run raid on Redhat distributions, and some Slackware, so I can't speak 
for Ubuntu from great experience, but that's what it sounds like. When 
you boot, is the /boot mounted on a degraded array or on the raw partition?
> Here some config files: 
>
> #cat /proc/mdstat 
> Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5]
> [raid4] [raid10] 
> md2 : active raid1 sda6[0] sdb6[1]
>       117185984 blocks [2/2] [UU]
>       
> md1 : active raid1 sda5[0] sdb5[1]
>       1951744 blocks [2/2] [UU]
>       
> md0 : active raid1 sda1[0]
>       19534912 blocks [2/1] [U_]	<<<<<<<< this is the problem: looks like U_ after reboot
>       
> unused devices: <none>
>
> #fdisk /dev/sda
>   Device Boot      Start         End      Blocks   Id  System
> /dev/sda1               1        2432    19535008+  fd  Linux raid
> autodetect
> /dev/sda2            2433       17264   119138040    5  Extended
> /dev/sda3   *       17265       20451    25599577+   7  HPFS/NTFS
> /dev/sda4           20452       30400    79915342+   7  HPFS/NTFS
> /dev/sda5            2433        2675     1951866   fd  Linux raid
> autodetect
> /dev/sda6            2676       17264   117186111   fd  Linux raid
> autodetect
>
> #fdisk /dev/sdb
>  Device Boot      Start         End      Blocks   Id  System
> /dev/sdb1               1        2432    19535008+  fd  Linux raid
> autodetect
> /dev/sdb2            2433       17264   119138040    5  Extended
> /dev/sdb3           17265       30400   105514920    7  HPFS/NTFS
> /dev/sdb5            2433        2675     1951866   fd  Linux raid
> autodetect
> /dev/sdb6            2676       17264   117186111   fd  Linux raid
> autodetect
>
> # mount
> /dev/md0 on / type reiserfs (rw,notail)
> proc on /proc type proc (rw,noexec,nosuid,nodev)
> /sys on /sys type sysfs (rw,noexec,nosuid,nodev)
> varrun on /var/run type tmpfs (rw,noexec,nosuid,nodev,mode=0755)
> varlock on /var/lock type tmpfs (rw,noexec,nosuid,nodev,mode=1777)
> udev on /dev type tmpfs (rw,mode=0755)
> devshm on /dev/shm type tmpfs (rw)
> devpts on /dev/pts type devpts (rw,gid=5,mode=620)
> lrm on /lib/modules/2.6.22-14-generic/volatile type tmpfs (rw)
> /dev/md2 on /home type reiserfs (rw)
> securityfs on /sys/kernel/security type securityfs (rw)
>
> Could anyone help me to solve this problem? 
> thanks
> greets
> Berni
> -
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>   


-- 
Bill Davidsen <davidsen@tmr.com>
  "Woe unto the statesman who makes war without a reason that will still
  be valid when the war is over..." Otto von Bismark