Adaptec 2940AU does not work correctly with OS5

Adaptec 2940AU does not work correctly with OS5

Post by colanz » Fri, 14 Mar 1997 04:00:00



I have a trouble with new adaptec 2940AU (bios 1.21) with O.S.5 5.0.2
I have already installed the advanced hardware supplements.

I am installing two 4 GB disk drives.

I have disabled the extended translation but the disk geometry appears with
255 heads scheme.

If I use an old 2940S76 I can format disk with 64 heads scheme, and then
the
disk works correctly with 64 heads geometry.

If I add a second HD formatted with 64 heads geometry with an old
controller
using the new 2940AU it appears with 255 head scheme.

Note on the same controller 1st disk (boot disk) works correctly with 64
heads
schema, 2nd disk (does not) work with 255 heads geometry!

Can someone help me?  

 
 
 

Adaptec 2940AU does not work correctly with OS5

Post by Bela Lubki » Sat, 15 Mar 1997 04:00:00



> I have a trouble with new adaptec 2940AU (bios 1.21) with O.S.5 5.0.2
> I have already installed the advanced hardware supplements.

> I am installing two 4 GB disk drives.

> I have disabled the extended translation but the disk geometry appears with
> 255 heads scheme.

> If I use an old 2940S76 I can format disk with 64 heads scheme, and then
> the
> disk works correctly with 64 heads geometry.

> If I add a second HD formatted with 64 heads geometry with an old
> controller
> using the new 2940AU it appears with 255 head scheme.

> Note on the same controller 1st disk (boot disk) works correctly with 64
> heads
> schema, 2nd disk (does not) work with 255 heads geometry!

Again, you should check whether Adaptec has a newer 2940 driver.  You
should also make sure you have their latest 2940AU firmware.

Under OpenServer 5 or with 3.2v4.2 + uod429a, it is possible to "stamp"
a SCSI disk with a specific geometry.  When you move that disk to a new
controller, it will retain its previous geometry.  This stamping is not
done automatically; you must do it yourself.  If /dev/rdsk/3s0 is the
raw device node for the disk you want to stamp, the command is:

  dparam /dev/rdsk/3s0 cyls heads 0 0 0 0 0 secs   [five "0"s]
                       ^^^^ ^^^^^           ^^^^
                        fill in desired values

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