Re: new Areca driver in 2.6.16-rc6-mm2 appears to be broken

[Jens Axboe <axboe@suse.de>]

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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