Re: [Bug-tar] tar: unable to read LTO4 tapes on a LTO5 drive using tar

[peter.chiu]

Some more details recorded in the ddrescue logfile, but not sure how to 
interpret it:

(My apologies that this may not be the right forum on this...)

# Rescue Logfile. Created by GNU ddrescue version 1.16
# Command line: ddrescue /dev/st0 /tmp/lto/tar logfile
# current_pos  current_status
0x11E6E9E8000     /
#      pos        size  status
0x00000000  0x0416D600  -
0x0416D600  0x007E4600  /
0x04951C00  0x0381BC00  -
0x0816D800  0x027E4600  /
0x0A951E00  0x0181C000  -
0x0C16DE00  0x007E4400  /
0x0C952200  0x0381B800  -
0x1016DA00  0x067E4600  /
0x16952000  0x0181C000  -
0x1816E000  0x027E4400  /
0x1A952400  0x0181C000  -
0x1C16E400  0x007E4200  /
0x1C952600  0x0381B600  -
0x2016DC00  0x0E7E4600  /
0x2E952200  0x0181C000  -
0x3016E200  0x067E4400  /
0x36952600  0x0181C000  -
...

Peter

-----Original Message-----
From: Chiu, Peter (STFC,RAL,RALSP) 
Sent: 15 June 2012 17:45
To: Antonio Diaz Diaz; address@hidden
Cc: Chiu, Peter (STFC,RAL,RALSP)
Subject: RE: [Bug-tar] tar: unable to read LTO4 tapes on a LTO5 drive using tar

thanks, Antonio,

I have downloaded ddrescue, and invoked this command:

ddrescue /dev/st0 /tmp/lto/tar logfile 

The command is still running, and so far the logfile is showing:

frost:/tmp/lto # cat logfile
# Rescue Logfile. Created by GNU ddrescue version 1.16 # Command line: ddrescue 
/dev/st0 /tmp/lto/tar logfile # current_pos  current_status
0x00000000     ?
#      pos        size  status
0x00000000  0x7FFFFFFFFFFFFFFF  ?

Not sure what it means. 
Peter

________________________________________
From: Antonio Diaz Diaz address@hidden
Sent: 15 June 2012 16:05
To: address@hidden
Cc: Chiu, Peter (STFC,RAL,RALSP)
Subject: Re: [Bug-tar] tar: unable to read LTO4 tapes on a LTO5 drive using tar

Paul Eggert wrote:
>>we are getting io errors.
>
> Possibly that's because the tape is bad.

If this is the case and the cause are media errors, you can try reading the 
tape with ddrescue[1].

[1] http://www.gnu.org/software/ddrescue/ddrescue.html


Regards,
Antonio.
--
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