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PAX error on retrieving from tape

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Operating Systems AIX PAX error on retrieving from tape
# 1  
Old 10-11-2007
PAX error on retrieving from tape
Hi, I am using AIX 5.3.0.0 and Ultrium LTO3 Tape Drive as rmt1. I have backup some of my database file using command "pax" as
pax -wvf /dev/rmt1 "./data01/abc.dmp"

But when I tried to read the file from tape by issuing the command,
pax -vf /dev/rmt1
The error message displayed as

pax: /dev/rmt1 : 0511-626 An invalid file header has been read.
pax: /dev/rmt1 : Skipping to the next file...

Anyone can let me know what is going on?
# 2  
Old 10-11-2007
1. have you rewound the tape?

2. you could use "dd" to dump the first 256 bytes to see if it looks like a sensible header.
# 3  
Old 10-12-2007
Help!!
FYI, this is LTO3 tape and is there any way to manually rewind the tape? Normally, we just insert the tape and it will rewind by itself.
FYI too, I have append the tape quite few times with command
pax -awvf /dev/rmt1 "./data01/abcd12.dmp"

May I know how to run the 'dd'?
# 4  
Old 10-12-2007
The device you are using is a rewinding (non-rewinding is /dev/rmt1.1) one,
for the dd
Code:
dd if=/dev/rmt1 of=/tmp/filehead.256 bs=1024

or just try man dd
# 5  
Old 10-12-2007
The message after the command 'dd' is
dd: 0511-065 Requested a write of 1024 bytes, but wrote only 1023.

May I know whether the tape is spoiled? or whether I can still retrieve the data?

Thanks in advance.\
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