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тАО09-17-2003 11:39 AM
тАО09-17-2003 11:39 AM
Recover cpio tape data
This is on HP-UX v10.20.
We write backup files to DDS tape using cpio -ocvBx.
The tape contents will be many small files, followed by a 10Mb file and then a 600Mb file at the end.
In this case the tape has been re-written with the same cpio command (rewound first), but only putting the many small files onto the start of the tape. The number and sizes of these files is virtually unchanged.
Is there any way I can retrieve the 600Mb file from the end of the first backup?
Thanks very much!
We write backup files to DDS tape using cpio -ocvBx.
The tape contents will be many small files, followed by a 10Mb file and then a 600Mb file at the end.
In this case the tape has been re-written with the same cpio command (rewound first), but only putting the many small files onto the start of the tape. The number and sizes of these files is virtually unchanged.
Is there any way I can retrieve the 600Mb file from the end of the first backup?
Thanks very much!
3 REPLIES 3
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тАО09-17-2003 12:03 PM
тАО09-17-2003 12:03 PM
Re: Recover cpio tape data
i would dump the entire tape out through dd and then piped to cpio
dd if=/dev/rmt/0m bs=1024 | cpio -itv
this will dump everything from the tape to disk then you can do whatever you need to get your file ;->
dd if=/dev/rmt/0m bs=1024 | cpio -itv
this will dump everything from the tape to disk then you can do whatever you need to get your file ;->
"Vision, is the art of seeing the invisible"
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тАО09-18-2003 02:00 AM
тАО09-18-2003 02:00 AM
Re: Recover cpio tape data
Hi Donny
Thanks for the suggestion. We've given it a try and also this variant:
dd if=/dev/rmt/0mn bs=1024 | cpio -Rcitv
However whilst it reads the data from the second (more recent) backup it stops as soon as it hits the end of volume marker. Have not had any luck yet in persuading it to look beyond this point.
We've tried using mt with -fsr or -fsf (also backward moves) and still no luck.
Any further suggestions will be most welcome.
Andy
Thanks for the suggestion. We've given it a try and also this variant:
dd if=/dev/rmt/0mn bs=1024 | cpio -Rcitv
However whilst it reads the data from the second (more recent) backup it stops as soon as it hits the end of volume marker. Have not had any luck yet in persuading it to look beyond this point.
We've tried using mt with -fsr or -fsf (also backward moves) and still no luck.
Any further suggestions will be most welcome.
Andy
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тАО09-18-2003 06:31 AM
тАО09-18-2003 06:31 AM
Re: Recover cpio tape data
Andy,
look at this thread it might assist you further.
also try searching the forum. make sure you select ITRC forums.
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x8f6190f7c8132f4daad6e97c64ba7cd6,00.html
good luck.
Donny
look at this thread it might assist you further.
also try searching the forum. make sure you select ITRC forums.
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x8f6190f7c8132f4daad6e97c64ba7cd6,00.html
good luck.
Donny
"Vision, is the art of seeing the invisible"
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