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    SubjectRe: new Areca driver in 2.6.16-rc6-mm2 appears to be broken
    On Wed, Apr 12 2006, erich wrote:
    > Dear Jens Axboe,
    >
    > I had found a big difference of generic_make_request(struct bio *bio)
    > got message : sdb1: rw=0, want=...., limit=.....
    >
    >
    > *****************
    > ** TEST 1
    > *****************
    >
    > I used "MAX_XFER_SECTORS 4096" driver to do mkfs.ext2 with ARECA RAID
    > volume sdb1.
    > and copy a big file (900MB) into sdb1.
    > If I copy this file from sdb1, the message rw=.... ,want=......,
    > limit=...... will appear immediately.
    >
    > When I reboot the system and used "MAX_XFER_SECTORS 512" driver.
    > I copy this big file from sdb1, the message rw=.... ,want=......,
    > limit=...... still appear immediately.

    This to me looks like you have a corrupted fs after using the 4k sectors
    as the max transfer setting. I would look for a bug in the driver that
    could explain this. Or perhaps the hardware.

    Can you try and boot with MAX_XFER_SECTORS at 4096 and run mkfs + copy
    big file to the partition. umount, then boot a kernel with
    MAX_XFER_SECTORS at 512 and do a full fsck of that partition.


    --
    Jens Axboe

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