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From: mhughes@logroad.bridge.com (Michael Hughes)
Message-Id: <200002102124.PAA13946@logroad.bridge.com>
Subject: Re: Trouble Reading Tape, Drive or Software?
To: cjclark@home.com
Date: Thu, 10 Feb 2000 15:24:54 -0600 (CST)
Cc: freebsd-questions@FreeBSD.ORG
In-Reply-To: <20000210154332.A18555@cc942873-a.ewndsr1.nj.home.com> from "Crist J. Clark" at Feb 10, 2000 03:44:58 PM
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Clark,
  Have you rew the tape since you did the backup?  You are using the
no rewind device.

Crist J. Clark said in email to me:
> 
> Last night, I did a backup of a machine and piped the dump output over
> ssh to another machine which then put the data on tape. The command on
> the remote host was basically something like,
> 
>    dump -ua0f -  / | ssh tape-server dd of=/dev/nrsa0
> 
> However, I cannot now read the tape. I first just tried stuff like,
> 
>   # restore -tvf /dev/nrsa0
> 
> But it would report it was not a dump tape. It seemed like it might be
> a blocksize issue, so I tried to reverse the process,
> 
>   # dd if=/dev/nrsa0 | restore -tvf -
> 
> But no good. dd(1) gives me the following (this is cut and paste of an
> attempt to just read the tape to a file),
> 
> dd if=/dev/nrsa0 of=var.dmp
> dd: Feb 10 11:12:58 backmail /kernel: (sa0:aha0:0:6:0): 10240-byte tape record bigger than suplied buffer
> /dev/nrsa0: Input/output error
> 0+0 records in
> 0+0 records out
> 0 bytes transferred in 11.644325 secs (0 bytes/sec)
> Feb 10 11:12:58 backmail /kernel: (sa0:aha0:0:6:0): tape is now frozen- use an OFFLINE, REWIND or MTEOM command to clear this state.
> 
> When I rewind the tape (mt -f /dev/rsa0 rewind) and try again, I get
> the same message.
> 
> Is this a problem with my dd(1) options, dump(8) options, kernel
> configuration, or is it a sign that the tape hardware is a problem?
> 
> This is the first time I've used a tape on FreeBSD. Some additional
> info, the OS version is 3.4-STABLE and the drive is a "EXABYTE
> EXB-850085QANXRC 06X0" in the dmesg.
> -- 
> Crist J. Clark                           cjclark@home.com
> 
> 
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> 
> 


-- 
Michael Hughes                         email:mhughes@bridge.com 
Bridge Information Systems, Inc.   Pager pin:3142245953
St Louis MO                      Pager email:3142245953@scout.pagemart.net


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