gplan@sun9.aer.com (George Planansky) (04/06/91)
I need a way to make copies of our exabyte dump tapes, a couple of
times a week. These have ten or so dump files on them.
Copytape works for making a copy of 9-track tapes:
9-track tape drive a ---> { copytape } ---> 9-track tape drive b
1. Is there a program that will do:
exabyte tape drive a ---> { copytape } ---> exabyte tape drive b
(A while back, I couldn't get copytape to work with an exabyte drive.)
2. Is there in fact a way to run exabyte drives to make copies directly:
exabyte tape drive a ---> exabyte tape drive b
3. If there is a reasonable way to make duplicates of these exabyte
tapes, I would appreciate hearing of it.
Thanks.
--
George Planansky
Atmospheric & Environmental Research
840 Memorial Drive, Cambridge, MA 02139
gplanansky@aer.com (617) 547-6207 fax: 661-6479greywolf@unisoft.UUCP (The Grey Wolf) (04/14/91)
/* <GPLAN.91Apr5184957@sun9.aer.com> by gplan@sun9.aer.com (George Planansky) * I need a way to make copies of our exabyte dump tapes, a couple of * times a week. These have ten or so dump files on them. * 2. Is there in fact a way to run exabyte drives to make copies directly: * * exabyte tape drive a ---> exabyte tape drive b * * 3. If there is a reasonable way to make duplicates of these exabyte * tapes, I would appreciate hearing of it. Have you considered something like: dd if=/dev/xbt0 of=/dev/xbt1 ibs=128k obs=128k I used to do that with *other* tapes :-) (insert standard exabyte-ignorant disclaimer). It ought to work pretty well, though, especially if the drive can read/write at a fairly good clip (in which case 128k may not be the top limit on performance). Question: Is the Exabyte SCSI-only, or has anyone made a decent DMA implementation (I am (possibly erroneously) under the impression that SCSI does not do DMA))? * * Thanks. * -- * George Planansky * Atmospheric & Environmental Research * 840 Memorial Drive, Cambridge, MA 02139 * gplanansky@aer.com (617) 547-6207 fax: 661-6479