Networker

Re: [Networker] Errors labeling tapes?

2007-12-14 13:09:40
Subject: Re: [Networker] Errors labeling tapes?
From: Terry Lemons <lemons_terry AT EMC DOT COM>
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Date: Fri, 14 Dec 2007 13:06:26 -0500
> 
> Can you access the tape directly with 'dd' or something?

>>This being a Win2003 server, no, I can't. :-)

> Can you read the first block of the tape?
> 
> dd if=/dev/rmt/0cbn bs=64k count=1 | od -c

>>Don't think there is a Windows equivalent of 'dd'. Or if there is, I 
>>haven't installed it.

Sure can!  Install cygwin; dd is part of this package.  I'm absolutely sure of 
this, because I used it earlier today.

Also, the first two files on a NetWorker tape are the label and the backup 
label, respectively; each is 32 KB long.  So, if you rewind the tape to the 
beginning, the first and second 'dd' you use should be:

dd if=/dev/rmt/0cbn bs=32k count=1 | od -c

The block size of the third and following files will depend on the device type; 
NetWorker specifies a default block size for every output device.

tl

Terry Lemons
Backup Platforms Group
EMC² 
where information lives
4400 Computer Drive, MS D239
Westboro MA 01580
Phone: 508 898 7312
Email: Lemons_Terry AT emc DOT com

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