RE: Problem with megaraid and PERC3/dc on a poweredge 6450

Mukker, Atul
2005-01-05T17:07:12Z

Please attach the dmesg output from the megaraid_mm and megaraid_mbox
drivers as well. Also, all files from /proc/megaraid2 directory from 2.4
kernel driver

Thanks
-Atul Mukker
LSI Logic Corporation

> -----Original Message-----
> From: Stefan Berder [mailto:sbe@oleane.net]
> Sent: Wednesday, January 05, 2005 11:50 AM
> To: linux-scsi@vger.kernel.org
> Subject: Problem with megaraid and PERC3/dc on a poweredge 6450
>
> Hi all,
> I got some strange problems with the megaraid driver under linux.
> The box I'm running is a dell poweredge 6450 with a PERC3/DC
> raid controller and Adaptec AIC-7899P controllers. I got
> 2x36GB (RAID1) scsi hdd inside the box an 13x36GB (RAID5) in
> a dell hdd bay, debian sarge is the system.
>
> I got various problems :
> - I found a debian install iso on the linux.dell;com site to
> install the box. It's a 2.4.28 kernel, and the box is working
> fine with this kernel.
> When I switch to a 2.4.28 kernel based on the configuration
> file provided with the install kernel and removing some
> useless things, adding netfilter, the box boots but hdds got
> really poor performances :
> brucelee:~/src# hdparm -t -T /dev/sda /dev/sdb
>
> /dev/sda:
> Timing cached reads: 724 MB in 2.00 seconds = 362.00 MB/sec
> Timing buffered disk reads: 12 MB in 3.56 seconds = 3.37 MB/sec
>
> /dev/sdb:
> Timing cached reads: 668 MB in 2.00 seconds = 334.00 MB/sec
> Timing buffered disk reads: 12 MB in 3.19 seconds = 3.76 MB/sec
>
> - When I compile a 2.6.10 kernel, I got 2 problems, first
> when I use the megaraid legacy I get a kernel panic during
> boot with something about "data cache" before. When I use the
> new megaraid (megaraid_mm and
> megaraid_mbox) during the kernel scsi probe it says that some
> command hangs and timeouts, then it does a lot of timeouts...
>
> lspci and dmesg attached