Recently had to migrate data from an old drive in an old server that was connected to the new server. Trying to mount the partitions gave me an unknown file system type:
[root@newServer ~]# fdisk -l /dev/sdb Disk /dev/sdb: 250.1 GB, 250059350016 bytes 255 heads, 63 sectors/track, 30401 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00082e92 Device Boot Start End Blocks Id System /dev/sdb1 * 1 16 128488+ fd Linux raid autodetect /dev/sdb2 17 277 2096482+ fd Linux raid autodetect /dev/sdb3 278 30401 241971030 fd Linux raid autodetect [root@newServer ~]# mount /dev/sdb3 /olddrive/ mount: unknown filesystem type 'linux_raid_member'
I managed to find a bunch of other "file systems" prefixed with "mdNNN" (N = Number):
Disk /dev/md125: 131 MB, 131465216 bytes 2 heads, 4 sectors/track, 32096 cylinders Units = cylinders of 8 * 512 = 4096 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System Disk /dev/md126: 247.8 GB, 247778246656 bytes 2 heads, 4 sectors/track, 60492736 cylinders Units = cylinders of 8 * 512 = 4096 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/md127: 2146 MB, 2146697216 bytes 2 heads, 4 sectors/track, 524096 cylinders Units = cylinders of 8 * 512 = 4096 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000
Obviously, the largest one was root (/), smallest was the boot partition, and the medium was swap. I was able to mount it into read only to the /olddrive folder:
[root@newServer ~]# mount -o ro /dev/md126 /olddrive/ [root@newServer ~]# ls /olddrive/ bin boot command dev downloads etc home initrd lib lost+found media misc mnt opt package proc root sbin selinux service srv sys tmp usr var [root@newServer ~]# mount /dev/mapper/VolGroup-lv_root on / type ext4 (rw) .... ... /dev/md126 on /olddrive type ext3 (ro)