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Thread: Help: cannot use ext2 on usb flash stick with Oleg (but can use ext3)

  1. #1

    Help: cannot use ext2 on usb flash stick with Oleg (but can use ext3)


    When reading several articles on mounting usb flash devices under linux,
    many of them advice to use ext2 i.s.o. ext3 to prevent premature flash wearout, in combination with mounting such partitions with -o noatime.

    However, when trying to get this to work with Oleg's firmware
    it will not mount the ext2 partition.

    I used fdisk to wipe all partitions and make a fresh one:

    fdisk -l

    Disk /dev/scsi/host0/bus0/target0/lun0/disc: 131 MB, 131072000 bytes
    16 heads, 32 sectors/track, 500 cylinders
    Units = cylinders of 512 * 512 = 262144 bytes

    Device Boot Start End Blocks Id System
    /dev/scsi/host0/bus0/target0/lun0/part1 1 500 127984 83 Linux

    I formatted to ext2 partition with

    mke2fs /dev/discs/disc0/part1

    which completed succesful.

    Trying to mount it however will fail
    mount -t ext2 /dev/discs/disc0/part1 /opt
    mount: Mounting /dev/discs/disc0/part1 on /opt failed: No such device

    If however I format using ext3, everything is A OK.
    mke2fs -j /dev/discs/disc0/part1
    mount -o noatime /dev/discs/disc0/part1 /opt

    df gives:

    Filesystem 1k-blocks Used Available Use% Mounted on
    /dev/root 3072 3072 0 100% /
    /dev/discs/disc0/part1 123939 4127 113413 4% /opt

    How to proceed? I thought ext2 should work in all situations??
    I really want to prevent flash wearout due to ext3, and want to use ext2.

  2. #2
    Join Date
    Jun 2005
    See supported filesystems with
    cat /proc/filesystems
    and you will notice that ext2 is not included

  3. #3
    is it possible to add it without having to recompile the kernel myself?

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