[4237] in linux-scsi channel archive
Re: problem with MO drive (NCR driver problem?)
daemon@ATHENA.MIT.EDU (Gerard Roudier)
Sat Jun 27 10:36:40 1998
Date: Sat, 27 Jun 1998 15:35:57 +0200 (MET DST)
From: Gerard Roudier <groudier@club-internet.fr>
To: Ronald Wahl <rwahl@gmx.net>
cc: linux-scsi <linux-scsi@vger.rutgers.edu>
In-Reply-To: <Pine.LNX.3.96.980627120232.9724A-100000@goliath.csn.tu-chemnitz.de>
Ronald,
Since you donnot report any kernel error message related to the problem,
I would think your MO drive and the NCR driver version you are using are
working quite fine (BTW, thanks for using latest driver version).
Seems to me you are flooding the buffer cache with blocks of different
sizes and Linux is known not to like that at all.
Regards,
Gerard.
On Sat, 27 Jun 1998, Ronald Wahl wrote:
> Hi,
>
> I own the MO drive M2513A6 from Fujitsu. If I read/write a large amount
> of data to/from the drive the system is sometimes totally busy (this means
> it is in a nearly frozen state - but data will moved to/from the drive)
> an the load will go up to 2 or 3. After some seconds the system is usable
> again (but the load is constantly in the range of 1..3). This is really
> annoying. Can someone reproduce this? Will there be a fix?
>
> Some system info:
>
> Kernel: 2.0.34 with 2048Byte/Sector-Patch from
> http://home.pages.de/~mbuck/linux/patches.html
> CPU: K6-200 (Stepping 2)
> RAM: 98MB / 512 KB Cache
> SCSI-Controller: NCR53c875 (with NCR53c825 the same problem occurs)
> Driver: BSD driver (at the moment v3.0d, older ones have the same prob)
> SCSI-Devices:
> rwa@goliath:~$ cat /proc/scsi/scsi
> Attached devices:
> Host: scsi0 Channel: 00 Id: 00 Lun: 00
> Vendor: IBM Model: DPES-31080 Rev: S31Q
> Type: Direct-Access ANSI SCSI revision: 02
> Host: scsi0 Channel: 00 Id: 01 Lun: 00
> Vendor: FUJITSU Model: M2513A Rev: 1200
> Type: Optical Device ANSI SCSI revision: 02
> Host: scsi0 Channel: 00 Id: 02 Lun: 00
> Vendor: TOSHIBA Model: CD-ROM XM-3601TA Rev: 0725
> Type: CD-ROM ANSI SCSI revision: 02
> Host: scsi0 Channel: 00 Id: 06 Lun: 00
> Vendor: IBM Model: DCAS-34330 Rev: S65A
> Type: Direct-Access ANSI SCSI revision: 02
>
> tia,
> ron
-
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@vger.rutgers.edu
