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Thread: btrfs filesystem problem: mount /dev/sdb2 on /mnt failed: Cannot allocate memory

  1. #1

    Default btrfs filesystem problem: mount /dev/sdb2 on /mnt failed: Cannot allocate memory

    Hi,

    mein btrfs Filesystem ist defekt.
    Leider fehlen mir 3 Dateien in der Datensicherung

    gibt es eine Möglichkeit das Filesystem readonly zu mounten?

    #fdisk -l




    Disk /dev/sdb: 500.1 GB, 500107837440 bytes, 976773120 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk label type: dos
    Disk identifier: 0x0005f89a


    Device Boot Start End Blocks Id System
    /dev/sdb1 2048 16771071 8384512 82 Linux swap / Solaris
    /dev/sdb2 * 16771072 750782463 367005696 83 Linux


    # mount /dev/sdb2 /mnt
    mount: mount /dev/sdb2 on /mnt failed: Cannot allocate memory

    #btrfsck --repair /dev/sdb2

    nabling repair mode
    parent transid verify failed on 443277312 wanted 391397 found 391383
    parent transid verify failed on 443277312 wanted 391397 found 391383
    parent transid verify failed on 443277312 wanted 391397 found 391383
    parent transid verify failed on 443277312 wanted 391397 found 391383
    Ignoring transid failure
    Checking filesystem on /dev/sdb2
    UUID: f2fcf334-98e6-4e85-8cb1-e796c81b3718
    checking extents
    ....
    .....
    root 263 inode 24798 errors 1000, some csum missing
    root 263 inode 25085 errors 1000, some csum missing
    root 263 inode 25091 errors 1000, some csum missing
    root 263 inode 25092 errors 1000, some csum missing
    root 263 inode 25367 errors 1000, some csum missing
    root 263 inode 25417 errors 1000, some csum missing
    root 263 inode 25440 errors 1000, some csum missing
    root 263 inode 25456 errors 1000, some csum missing
    root 263 inode 25467 errors 1000, some csum missing
    root 263 inode 25515 errors 1000, some csum missing
    root 263 inode 25579 errors 1000, some csum missing
    root 263 inode 25581 errors 1000, some csum missing
    root 269 inode 640 errors 1000, some csum missing
    root 269 inode 647 errors 1000, some csum missing
    parent transid verify failed on 66056192 wanted 383588 found 391395
    Ignoring transid failure
    btrfsck: cmds-check.c:1320: walk_down_tree: Assertion `!(1)' failed.
    Aborted



    Danke
    Thomas

  2. #2
    Join Date
    Jan 2013
    Location
    Germany
    Posts
    289

    Default Re: btrfs filesystem problem: mount /dev/sdb2 on /mnt failed: Cannot allocate memory

    Hallo,

    Du kannst von einer Live-CD aus booten.

    Viele Grüße
    Sarah

  3. #3

    Default Re: btrfs filesystem problem: mount /dev/sdb2 on /mnt failed: Cannot allocate memory

    Hallo,

    Danke. das habe ich schon probiert,
    bekomme aber das gleich Ergebnis.

    Gruß
    Thomas

  4. #4

    Default Re: btrfs filesystem problem: mount /dev/sdb2 on /mnt failed: Cannot allocate memory

    Hi,

    the best way that I found was

    # ./btrfs restore /dev/sda /mnt/restore

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