[5333] in linux-scsi channel archive
SCSI disk geometry on NCR810 (DEC Alpha UDB)
daemon@ATHENA.MIT.EDU (Brendan Miller)
Mon Dec 7 10:52:48 1998
Date: Mon, 7 Dec 1998 01:52:24 -0800
From: Brendan Miller <brmiller@netgate.net>
To: linux-scsi@vger.rutgers.edu
Reply-To: Brendan Miller <brmiller@netgate.net>
[I asked this question on the axp-list, and didn't get a response, so
I'm asking in the SCSI forum instead]
All but one of my four SCSI disks connected to my DEC Multia have geometries
with heads = 64, sectors = 32, cylinders = approx. # MB. Except one, that
is. This disk has H = 255, S = 63, C = 261. I wouldn't have worried
about it, except that when I came close to filling the disk up, "bad things"
happened. I ended up with a lot of SCSI errors, fsck puked, etc. One
of the disks on my chain is identical to the one with the 255/63/261
geometry, and it has 64/32/2047 geometry. So I thought I would change
the geometry in fdisk. fdisk doesn't want to let me do it--it always
changes it to 67/32/1009 or something like that.
My experience has shown me that when you low-level format a disk in SCSI
bios, the geometry usually gets [re]set by the card, but I could not find
a way to format it on my Multia.
Any help? Or am I just being anal with the geometry on that one disk?
Brendan
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