lkml.org 
[lkml]   [2001]   [Dec]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Slow Disk I/O with QPS M3 80GB HD
On Mon, Dec 10, 2001 at 08:34:52PM -0800, H . J . Lu wrote:
> I have a very strange problem. The disk I/O of my QPS M3 80GB HD is
> very slow under 2.4.10 and above. I got like 1.77 MB/s from hdparm.
> But under 2.4.9, I got 14 MB/s on the same hardware. A 30GB HD has
> consistent I/O performance under 2.4.9 and above on the same bus. Has
> anyone else seen this? Does anyone have a large (>= 80GB) 1394 HD?
>

I did a binary search. 2.4.10-pre10 is the last good kernel. I got

# hdparm -t /dev/sda

/dev/sda:
Timing buffered disk reads: 64 MB in 4.40 seconds = 14.55 MB/sec

Even since 2.4.10-pre11 up to 2.4.16, I got about 1.77 MB/sec on the
same hardware. However, I don't have problems with 80GB IDE HD. Has
anyone seen I/O problems on large (>= 80GB) SCSI HD or HD with SCSI
emulation?


H.J.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:14    [W:0.101 / U:0.576 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site