[6171] in linux-scsi channel archive
Re: Linux SCSI mystery (long war story)
daemon@ATHENA.MIT.EDU (Henrik Johansson)
Thu Mar 25 02:18:34 1999
Date: Thu, 25 Mar 1999 07:52:31 -0100 (GMT+1)
From: Henrik Johansson <henrik@lcdata.se>
To: Guest section DW <dwguest@win.tue.nl>
cc: de@ucolick.org, linux-scsi@vger.rutgers.edu
In-Reply-To: <199903241604.RAA21981@wsdw01.win.tue.nl>
Hi!
I fully concur with Andries; You have nothing to worry about.
If You feel uncomforatble about the Linux fdisk comments,
and You intend to install a new Linux system on it,
the removal and recreation of the exsisting partition
will fix this, adjusting the partiton-table to match
the read geometry of the disk.
Happy hacking,
Henrik J.
On Wed, 24 Mar 1999, Guest section DW wrote:
> From: De Clarke <de@ucolick.org>
>
> So I take the SCSI disk to work and hang it on
> a working scsi bus there (Adaptect ctrlr). I take
> a look at the partition table and it looks terminally
> weird:
>
> Oh, not at all - it is in excellent shape.
> First of all, note the Id's: 83 Linux native
> not some random value. This means that the disk is fine
> and the SCSI controller is reading it fine.
>
> What about the geometry complaints?
> Well, you see, the SCSI controller you used to read it
> uses a geometry with 255 heads, 63 sectors, while the
> partition table was written on a SCSI controller that
> uses 66 heads , 63 sectors. Thus, this first partition
> ends after precisely 32 cylinders.
>
> Disk /dev/sdc: 255 heads, 63 sectors, 263 cylinders
> Units = cylinders of 16065 * 512 bytes
>
> Device Boot Start End Blocks Id System
>
> /dev/sdc1 * 1 9 66496+ 83 Linux native
> Partition 1 has different physical/logical endings:
> phys=(31, 65, 63) logical=(8, 71, 63)
> Partition 1 does not end on cylinder boundary:
> phys=(31, 65, 63) should be (31, 254, 63)
>
> I don't like the look of that.
>
> You are needlessly afraid. A perfect disk, it will work fine
> with Linux.
>
> Andries
>
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