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mike1234i's avatar
mike1234i
Aspirant
Sep 12, 2012

Unable to mount /dev/c/c #19420777

I have a ReadyNAS Pro Pioneer Edition [X-RAID2] running RAIDiator 4.2.21. My NAS seems to be in bad shape and I was wondering if someone could provide some assistance before I moved on to a rebuild. I was having issues with saving files this morning and it seemed to caused by the filesystem being read only. When I rebooted the ReadyNAS, I got the email:

***** File system check performed at Wed Sep 12 08:31:03 CDT 2012 *****
fsck 1.41.14 (22-Dec-2010)
/dev/c/c: Note: if several inode or block bitmap blocks or part
of the inode table require relocation, you may wish to try
running e2fsck with the '-b 32768' option first. The problem
may lie only with the primary block group descriptors, and
the backup block group descriptors may be OK.

/dev/c/c: Block bitmap for group 1920 is not in group. (block 914014173)


/dev/c/c: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.
(i.e., without -a or -p options)


I tried to do a full scan, but the /dev/c/c still does not mount. The fsck scan gave me a slew of the following errors:

Block bitmap for group 1920 is not in group. (block 914014173)
Relocate? yes

Inode bitmap for group 1920 is not in group. (block 914014170)
Relocate? yes

Inode table for group 1920 is not in group. (block 913965056)
WARNING: SEVERE DATA LOSS POSSIBLE.
Relocate? yes


I'd like to recover the volume since there are non-critical items that I do not have a backup of or would take me a while to recreate. However, if needed I am prepared to do a factory reset and move on. My lesson learned will be -- don't play with 3rd party add-ons on your production box.

4 Replies

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  • mdgm-ntgr's avatar
    mdgm-ntgr
    NETGEAR Employee Retired
    Open a support case at my.NetGear.com and post your case number
  • Support was very responsive about getting back to me, however they were unable to fix the problem. After pulling each disk for testing I realized that the problem is that 3 disks (out of 6) went bad with no warning. My NAS was setup with dual parity, but obviously could not handle 3 failures.

    I recently upgraded to 6 3TB Seagate (ST3000DM001) drives. Clearly this was my mistake. Out of the 7 drives (1 spare) originally purchased, 4 have gone bad in less than 4 months.
  • mdgm-ntgr's avatar
    mdgm-ntgr
    NETGEAR Employee Retired
    Do you have a good backup?

    How bad have the 3 disks failed? Are they detected by your PC?

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