# mdadm -Q /dev/sda
/dev/sda: is not an md array
/dev/sda: No md super block found, not an md component.
# mdadm -Q /dev/sda1
/dev/sda1: is not an md array
/dev/sda1: No md super block found, not an md component.
# mdadm -Q /dev/sda2
/dev/sda2: is not an md array
So it looks like all info is lost. Can I create a new array with the
existing LVM partitions and the free partitions without destroying any data?
Thanks,
Theo
Centos wrote:
> Find out what disk belongs to which md-set and try the --assemble
> option..
>
> This should fix it, I think
>
> Theo Band wrote:
>> Hi
>>
>> I have setup software RAID two years ago using FC3 using the graphical
>> installer (RAID1). In the mean time I installed CENTOS4.5 and everything
>> is running fine. At least that was my perception. It now turns out that
>> raid is not working and that LVS just finds 4 partitions from four disks
>> and that's it.:
>>
>> /dev/sda2 VolGroup00 lvm2 a- 94.88G 0
>> /dev/sdb1 VolGroup00 lvm2 a- 94.94G 10.00G
>> /dev/sdc1 VolGroup00 lvm2 a- 94.94G 74.94G
>> /dev/sdd1 VolGroup00 lvm2 a- 94.94G 70.81G
>>
>> These are 4 disk of each 200GB, and the disks have these partitions:
>>
>> Using /dev/sda
>> (parted) print
>> Disk geometry for /dev/sda: 0.000-194481.000 megabytes
>> Disk label type: msdos
>> Minor Start End Type Filesystem Flags
>> 1 0.031 101.975 primary ext3 boot
>> 2 101.975 97284.243 primary lvm
>> 3 97284.243 194474.355 primary raid
>> Disk geometry for /dev/sdb: 0.000-194481.000 megabytes
>> Disk label type: msdos
>> Minor Start End Type Filesystem Flags
>> 1 0.031 97237.177 primary boot, lvm
>> 2 97237.178 194474.355 primary raid
>> Disk geometry for /dev/sdc: 0.000-194481.000 megabytes
>> Disk label type: msdos
>> Minor Start End Type Filesystem Flags
>> 1 0.031 97237.177 primary boot, lvm
>> 2 97237.178 194474.355 primary raid
>> Disk geometry for /dev/sdd: 0.000-194481.000 megabytes
>> Disk label type: msdos
>> Minor Start End Type Filesystem Flags
>> 1 0.031 97237.177 primary boot, lvm
>> 2 97237.178 194474.355 primary raid
>>
>> So my feeling is that I need to setup the RAID again, but I don't want
>> to make any mistakes here, since this is a live system working fine. I
>> tried to read the mdadm manual but it's not quit clear to me what to do.
>> # mdadm -A --scan -v
>> mdadm: No arrays found in config file
>>
>> Shows I have to do more. The previous fedora installation is still
>> around, but is doesn't contain a /etc/mdadm.conf file.
>>
>> Can anyone help me with some steps to take to get it running again. I do
>> have backups, but if things go wrong restoring takes several hours.
>>
>> Thanks,
>> Theo
>>
>>
>> PS.
>> Send for the third time. Could it be that posting is limited to email
>> addresses that are subscribed to the list?
>> _______________________________________________
>> CentOS mailing list
>> CentOS@xxxxxxxxxx
>> http://lists.centos.org/mailman/listinfo/centos
>>
> _______________________________________________
> CentOS mailing list
> CentOS@xxxxxxxxxx
> http://lists.centos.org/mailman/listinfo/centos
>
_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
http://lists.centos.org/mailman/listinfo/centos
