[946] in linux-scsi channel archive
Re: MD + NCR 53c7,8xx driver = death
daemon@ATHENA.MIT.EDU (Dan Hollis)
Sat Nov 16 15:48:57 1996
Date: Sat, 16 Nov 1996 13:41:32 -0800 (PST)
From: Dan Hollis <goemon@sasami.anime.net>
To: Gerard Roudier <groudier@club-internet.fr>
cc: linux-scsi@vger.rutgers.edu, linux-raid@vger.rutgers.edu
In-Reply-To: <Pine.LNX.3.91.961116160804.149A-100000@localhost>
On Sat, 16 Nov 1996, Gerard Roudier wrote:
> On Sat, 16 Nov 1996, Dan Hollis wrote:
> > Using the NCR 53c7,8xx driver with MD is certain death at the moment.
> >
> > mkfs -t ext2 /dev/md0 starts up, gets to about block 39 then the kernel
> > starts spewing hundreds of:
> >
> > Warning - running *really* short on DMA buffers
> > Warning - running *really* short on DMA buffers
> > Warning - running *really* short on DMA buffers
> > [ad infinitum]
> >
> > The ported freeBSD ncr53c8xx works fine.
> Obviously, my opinion is that the ncr53c8xx driver is better.
> However, I would be surprised if the 53c7,8xx driver is the real cause of
> the problem you report.
>
> Can you send the linux version, kernel config and scsi hardware description
> you are using?
Linux 2.0.25, P90, 64mb ram, PCI
MD Support, RAID0 as module
SCSI support as module
SCSI disk support as module
NCR53c7,8xx SCSI as module, with defaults
NCR53C8XX as module, with defaults
news:~$ cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 01 Lun: 00
Vendor: SEAGATE Model: ST43400N Rev: 1027
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 02 Lun: 00
Vendor: SEAGATE Model: ST43400N Rev: 1022
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 03 Lun: 00
Vendor: SEAGATE Model: ST43400N Rev: 1027
Type: Direct-Access ANSI SCSI revision: 02
news:~# cat /proc/mdstat
Personalities : [2 raid0]
read_ahead 120 sectors
md0 : active raid0 sda1 sdb1 sdc1 8528928 blocks 32k chunks
md1 : inactive
md2 : inactive
md3 : inactive
With NCR53c7,8xx the system has problems.
With NCR53C8XX the system has no problems.
-Dan
