[5123] in linux-scsi channel archive
Problems with DPT 2440UW
daemon@ATHENA.MIT.EDU (david leigh)
Fri Nov 13 01:48:16 1998
From: "david leigh" <vorlon@arach.net.au>
To: <linux-scsi@vger.rutgers.edu>
Date: Fri, 13 Nov 1998 13:23:31 +0800
Hi All
I am trying to get my DPT controller card to recognise all the drives on it.
1) Running RedHat 5.2 completely vanilla flavoured and no changes
2) DPT controller is happily detected during install, and the eata_dma.o
module used. This shows all 4 drives on the card when first detecting, but
then only gives access to two after install.
3) Not being certain if it may be a drive thing, I have played around with
different combinations of drives (1 and 2, 3 and 4, 1 and 4) etc... and have
found that as long as I have only two drives - any two drives - plugged into
the bus then both are accessible without any problems.
4) However, if I have all four drives on the bus then I can still only
access the first two. (Ie sdb and sdc - sda is the boot volume which is
running off a seperate Adaptec 2940)
The one thing that I did notice was that when only two drives are in the
message I receive during lilo boot is
Queue depth set to 30
whereas when all four are in it says
Queue depth set to 16
The weird part is that the SCSI Bios and the initial module load all detect
the four drives ok. Its just when Linux goes on to initialise them only two
drives come up with size detected.
Finally, I have fdisked and run mke2fs on all these drives while I was doing
the single pair testing.
Also, when I cat /proc/scsi/scsi all attached drives are showing up, but
when I cat /proc/scsi/eata_dma/1 then it reports that the PM2044UW does not
have the cache module attached. It does, and it has 64MB Cache. Is the
driver for the DPT bad?
Anyone have any ideas on what seems to me to be a very weird thing far
beyond the ken of a mere mortal like myself?
Cheers
David Leigh
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