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Date:      Thu, 9 Dec 1999 21:44:47 -0500
From:      Greg Lehey <grog@mojave.sitaranetworks.com>
To:        Rodrigo Ormonde <ormonde@aker.com.br>
Cc:        questions@FreeBSD.org
Subject:   Re: Problems with tar and 4mm DAT
Message-ID:  <19991209214447.J439@mojave.sitaranetworks.com>
In-Reply-To: <3.0.3.32.19991209102245.006997c8@pop.aker.com.br>; from ormonde@aker.com.br on Thu, Dec 09, 1999 at 10:22:45AM -0200
References:  <3.0.3.32.19991206173943.00691120@pop.aker.com.br> <3.0.3.32.19991206173943.00691120@pop.aker.com.br> <19991208152447.61061@mojave.sitaranetworks.com> <3.0.3.32.19991209102245.006997c8@pop.aker.com.br>

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On Thursday,  9 December 1999 at 10:22:45 -0200, Rodrigo Ormonde wrote:
> At 15:24 08/12/99 -0500, you wrote:
>> On Monday,  6 December 1999 at 17:39:43 -0200, Rodrigo Ormonde wrote:
>>>   I'm trying to use the tar command to make a backup to a 4mm DAT in a
>>> FreeBSD 3.3 box. The tar starts the backup, but soon after it starts
>>> writing data to the tape, it aborts with the following message (however, it
>>> can write a few files before showing this message and I can restore these
>>> files later):
>>>
>>>   tar: can't write to /dev/rsa0 : Input/output error
>>>
>>>   The command I'm using to make the backup is:
>>>
>>>   tar cvf /dev/rsa0 /home
>>>
>>>   The kernel messages generated when it recognizes my SCSI adapter and the
>>> DAT device are:
>>>
>>>   amd0: <Tekram DC390(T)/AMD53c974 SCSI Host Adapter> rev 0x10 int a irq 10
>>> on pci 0.11.0
>>>   Waiting 15 seconds for SCSI devices to settle
>>>   sa0 at amd0 bus 0 target 2 lun 0
>>>   sa0: <SONY SDT-2000E E326> Removable Sequential Access SCSI-2 device
>>>   sa0: 5.000MB/s transfers (5.000MHz, offset 8)
>>>
>>>   Is there anything that I'm doing wrong ? Have anyone faced this problem
>>> before ?
>>
>> Do you get any console messages to accompany the I/O error?  They
>> would be in /var/log/messages.
>
>   No messages at all.
>
>   In fact, I changed my SCSI adapter for an Adaptec 7856 and everything
> worked fine. I suppose the FreeBSD Tekram driver isn't working correctly
> (or at least needs some special configuration that I'm not aware of).
>
>   The problem is not with the Tekram adapter since it is now working fine
> in another machine.

Hmm.  That does rather point to a problem with the Tekram adapter.  If
I understand you correctly, you don't intend to try that combination
again, which makes it difficult for us to find the problem.  If you do
want to help, please let me know and I'll try to help.

Greg
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