CPIO restoration from LTO2 tape media on AIX 4.3.3

UNIX AIX
1

Hi, AIXers :slight_smile:

Recently i'm playing around with cpio command, when i try to list out content from LTO2 Tape media using

command:

#cpio -itvc < /dev/rmt1

it's stopped at particular path

100777 root     1042591 Mar 24 10:09:05 2012 /home/uv/bin/usd

and there was an error thrown out:

cpio: 0511-037 Cannot read from the specified input.
Enter the device or file name when ready to continue.

At the same time the Tape ejected automatically and show Tape Drive / Media Error on the LTO2 tape drive.

There is no problem with LTO2 Tape drive as i tried on another Tape Media, it's work.

Anyone here faced this problem before?

Thanks for replying. Appreciate. :slight_smile:

2

Hi Polar,

Try to use the B option.

# cpio -itvcB </dev/rmt1

By the way...
If there are more tape markers on this tape:

# mt -f /dev/rmt1.1 fsf 1 ; cpio -itvcB -I /dev/rmt1.1

(.1 is the no-rewind device)
Skips one block, if there are any markers.

Another way to test the tape

dd if=/dev/rmt1 of=/dir-with-enough-space/1.dd  -noerror
cpio -itv -I /dir-with-enough-space/1.dd

Good luck,
Ren�

3

Hi rene, i have tried

 # cpio -itvcB </dev/rmt1

The output able t0 list more directories, but result is still the same. It's thrown out

 
cpio: 0511-037 Cannot read from the specified input.
Enter the device or file name when ready to continue.

For

# mt -f /dev/rmt1.1 fsf 1 ; cpio -itvcB -I /dev/rmt1.1

erm.. Nothing happened. i do not know how to identify the different.

For

dd if=/dev/rmt1 of=/dir-with-enough-space/1.dd  -noerror
cpio -itv -I /dir-with-enough-space/1.dd

Unable to run this command successfully.

I will try to make a backup copy with a new LTO2 tape media. Thanks rene. :slight_smile: