# 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 at centos.org >> http://lists.centos.org/mailman/listinfo/centos >> > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >