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Data Storage Problem

Daan van Aalten aalten at CSHL.ORG
Mon Feb 22 16:27:08 EST 1999

Hi Paul

This is a common problem with both DAT and 8mm tapes
A first step would be to look in your /dev/mt or /dev/rmt directory
and try to use a tape device a variable blocksize, so
tar xvf /dev/mt/tps0d2nsv
(the "2" is the SCSI ID of the tape drive)

Another possibility is that you need so swap your bytes on one drive
compared to the other. You can do this with
dd if=/dev/tape conv=swab | tar xvf -

Finally, sometimes specifying a hard block size may help:

dd if=/dev/tape bs=32k | tar xvf - 
(try different sizes instead of 32k in combination with different devices
in your /dev/rmt directory)

hope this helps


On Mon, 22 Feb 1999, Paul Hubbard wrote:

> ***  For details on how to be removed from this list visit the  ***
> ***    CCP4 home page http://www.dl.ac.uk/CCP/CCP4/main.html    ***
> Hi everyone,
> Our lab recently collected data at Argonne synchrotron, and before leaving
> copied the image files to 8mm tape. However, our own 8mm tape drive is
> unable to read them.
> Both APS and our lab use SGI's, so I was not expecting any problems; but I
> keep getting the following error message with these particular tapes:
> tar: tape premature EOF
> Has anyone else encountered a similar problem? Any ideas on what I can do?
> FTPing is a possibility, but we have limited hard drive space, so only one
> data set can be sent at a time. The folks at APS may not appreciate this!
> Many Thanks
> Paul Hubbard (Graduate Student)

Dr. Daan van Aalten
Keck Structural Biology
Cold Spring Harbor Laboratory           Tel. (516) 367 8867
1 Bungtown Road                         Fax  (516) 367 8873
Cold Spring Harbor, NY 11724            E-mail: aalten at cshl.org

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