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Date: Thu, 30 May 2013 10:52:04 -0400
From: Douglas Gilbert <dgilbert@interlog.com>
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To: Riccardo Veraldi <riccardo.veraldi@gmail.com>
Subject: Re: troubles with Seagate (EMC2)  disk
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On 13-05-30 06:12 AM, Riccardo Veraldi wrote:
> Hello,
> I have a Seagate ST350000 CLAR500 disk.
>
> it is attached to my Sun Blade 1000 running FreeBSD 9.1
>
> I need to label it, create partition and move te root /usr/ var and swap from
> the main boot disk which has corrupted blocks.
>
> so this disk will become my boot disk.
>
> the problem is that I cannot partition it or even access it in anyway
>
> dd: /dev/da6: Invalid argument
> 1+0 records in
> 0+0 records out
> 0 bytes transferred in 0.000700 secs (0 bytes/sec)
>
> this is the disk information:
>
> da6 at isp0 bus 0 scbus2 target 1 lun 0
> da6: <SEAGATE ST350000 CLAR500 FDBD> Fixed Direct Access SCSI-3 device
> da6: 100.000MB/s transfers WWNN 0x2000001862133c8d WWPN 0x2100001862133c8d
> PortID 0xe4
> da6: Command Queueing enabled
> da6: 476940MB (961745856 520 byte sectors: 255H 63S/T 59865C)
>
> the problem is that disk byte sectors are 520 and not 512
>
> is there a way to reformat it to 512 byte sectors ?
>
> is there a way to make it usable ?
>
> the SCSI III disk has a FC - AL interface (Internal Sun Blade 1000 Caddy).

In my sg3_utils package (see http://sg.danny.cz/sg/sg3_utils.html )
there is a utility called sg_format. If you are sure
that you do not want the existing data on that disk, try:
   sg_format --format --size=512 /dev/da6


Doug Gilbert