Well, I don't suppose you have enough disk space around to read one tape, write to a disk, and then read the disk with dd and write to the other tape?Nope, when I run dd the drives just sit there and do not respond. I can run dd and pull information from the drive and write to them, but sending information from one to the other is not working.
Thank You Will McCorkle Systems Administrator DG Systems wmccorkle@xxxxxxxxxxxxx 972-581-2119
-----Original Message----- From: fedora-list-bounces@xxxxxxxxxx [mailto:fedora-list-bounces@xxxxxxxxxx] On Behalf Of Patrick Boutilier Sent: Tuesday, September 14, 2004 3:37 PM To: For users of Fedora Core releases Subject: Re: tcopy
Will McCorkle wrote:
Yes, the data is put on the tape in 18 images using tar.
Have you tried dd ? This command might work (substitute real /dev devices).
dd if=/dev/tape1 of=/dev/tape2
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Seems if you can both read and write tape, but not both at once, you could do:
dd if=/dev/tape1 of=/tmp/xxxx
dd if=/tmp/xxxx of=/dev/tape2
(I'm guessing from your description above that the controller is only capable of having one tape drive in use at a time.)
You should almost certainly use ibs and obs to set some large blocksizes or else it will take halfway to forever to do the job. Optimal blocksize would be the blocksize that was used to write the tape, or even better an integer multiple of it, if you have the ram.
If you really don't have enough disk space, you could use the seek=, skip=, and count= options to dd to copy large chunks at a time. See the man page for dd, or the info file. "info coreutils dd" gives some helpful examples.
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