From owner-freebsd-scsi  Sun Nov 15 18:46:31 1998
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From: "Kenneth D. Merry" <ken@plutotech.com>
Message-Id: <199811160245.TAA24619@panzer.plutotech.com>
Subject: Re: 520byte sector size
In-Reply-To: <19981116022247.23622@cicely.de> from Bernd Walter at "Nov 16, 98 02:22:47 am"
To: ticso@cicely.de (Bernd Walter)
Date: Sun, 15 Nov 1998 19:45:53 -0700 (MST)
Cc: freebsd-scsi@FreeBSD.ORG
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Bernd Walter wrote...
> da8 at ahc6 bus 0 target 3 lun 0
> da8: <IBM 0661467 G o> Fixed Direct Access SCSI2 device 
> da8: 5.0MB/s transfers (5.0MHz, offset 12)
> da8: 388MB (782600 520 byte sectors: 64H 32S/T 382C)
> 
> FreeBSD don't like this sector size very much :(
> I know that they can be formated with 512 byte sectors.
> I've done this with an old 1542 on a similar drive.
> I just selected format in the BIOS-Tool and it lowlevel
> formated it with 512 byte sectors.
> 
> Unfortunately I don't like the idea of plugging a videocard
> into this host just for waiting for each drive (6 ones)
> 
> I've tried:
> camcontrol cmd -n pass -u 12 -v -t 9999 -c "4 0 0 0 0 0"
> but I gave me a fresh formated 520byte HDD :(
> 
> does anybody know the command to change the sector size?

Well, I've never done it before, but you might try changing the "Data Bytes
per Physical Sector" field in mode page 3 (the "Format device" page).

Of the two disks in my machine here, the Quantum doesn't allow changing
that value, but the IBM apparantly does.

If you can change it, you can then probably try formatting the drive again.

Ken
-- 
Kenneth Merry
ken@plutotech.com

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