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View Full Version : [ubuntu] Mount partition on single disk after RAID removal



hadaxu
December 9th, 2010, 06:39 PM
I had RAID 1 with two identical SATA hard drive configured by CMOS on a Dell desktop. After reinstallation of Ubuntu, I remove RAID to get more space and install the OS on the first hard drive and leave the 2nd one intact.

The problem is I cannot mount one of the partitions in the 2nd hard drive, which is /dev/sdb4. I can mount sdb1,sdb2,sdb3 flawlessly.

The command I use is:

sudo mount -t ext3 /dev/sdb4 /mnt/sdb4

(I know /dev/sdb4 was formatted as ext3).

Error I got:
===========================
mount: wrong fs type, bad option, bad superblock on /dev/sdb4,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
===========================

Here is the disk partition information:

================================================== ====
Disk /dev/sdb: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 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: 0x48000000

Device Boot Start End Blocks Id System
/dev/sdb1 1 15 120456 6 FAT16
/dev/sdb2 * 16 28 102400 7 HPFS/NTFS
Partition 2 does not end on cylinder boundary.
/dev/sdb3 28 6390 51097600 7 HPFS/NTFS
/dev/sdb4 6391 60801 437056357+ 5 Extended
/dev/sdb5 * 6391 58594 419328598+ fd Linux raid autodetect
/dev/sdb6 58595 60801 17727696 fd Linux raid autodetect
================================================== ====

Please advice. Thanks.

hadaxu
December 9th, 2010, 10:13 PM
Just figured out the /dev/sdb4 is an extended partition. The one I need is /dev/sdb5. Mounted.