Dear Jens Axboe,
About your request :
******************************************
** boot with driver MAX_XFER_SECTORS 4096
******************************************
#mkfs.ext2 /dev/sda1
#mount /dev/sda1 /mnt/sda1
#cp /root/aa /mnt/sda1/
#reboot
******************************************
** boot with driver MAX_XFER_SECTORS 512
******************************************
#fsck /dev/sda1
/dev/sda1:clean,.............
#mount /dev/sda1 /mnt/sda1
#cp /mnt/sda1/aa /home
cp: reading '/mnt/sda1/aa' : input/output error
got message : sda1: rw=0, want=...., limit=..... dump
Best Regards
Erich Chen
----- Original Message -----
From: "Jens Axboe" <[email protected]>
To: "erich" <[email protected]>
Cc: <[email protected]>; ""(????????????)??????O"" <[email protected]>;
"Al Viro" <[email protected]>; "Andrew Morton" <[email protected]>;
"Randy.Dunlap" <[email protected]>; "Matti Aarnio"
<[email protected]>; <[email protected]>; "James
Bottomley" <[email protected]>; "Chris Caputo" <[email protected]>
Sent: Wednesday, April 19, 2006 6:40 PM
Subject: Re: 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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