[6055] in linux-scsi channel archive
Re: Large Drives w/aic7895 on Tyan Thunder 2
daemon@ATHENA.MIT.EDU (Guest section DW)
Wed Mar 10 17:59:28 1999
Date: Wed, 10 Mar 1999 17:10:00 +0100 (MET)
From: dwguest@win.tue.nl (Guest section DW)
To: garlangr@furball.cyberramp.net, linux-scsi@vger.rutgers.edu
From: Mark Garlanger <garlangr@furball.cyberramp.net>
I having a problem with my new system: Tyan Thunder 2 with
the aic-7895 controller. I have a 8.7G U/W Micropolis drive
that I had been using with a PPro system(and aic-7880) with
no problems, but when I put it on my new system instead of
translating the number of heads/sectors/cylinders to
a reasonable number 255/63/1037 like the old system would
do, it leaves it at 64/32/8296 which causes problems with
lilo. Even though the two systems sees the drive differently,
I am still boot from it without reformating. It is currently
on 2.0.34. I faintly remember being able to specify the
harddrive parameters at the boot prompt and I tried
"sda=255,63,1037" without any luck. In the MB Bios I have
disabled the IDE totally. In the SCSI BIOS I have enabled
the option for >1G Drives but it seems to not affect it.
I am open for any ideas....
Thanks,
Mark
Hmm. When all else fails, read the docs.
In this case I read in the Large Disk HOWTO:
aic7xxx:
H=64, S=32 unless C > 1024, and moreover either the "extended"
boot parameter was given, or the `extended' bit was set in the
SEEPROM or BIOS, in which case H=255, S=63.
So, if this is correct then you can force 255/63/*
by giving the `extended' boot parameter.
Andries - aeb@cwi.nl
[And if this information is outdated, tell me so that I can
fix the docs.]
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