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- From: jwt@duke.cs.duke.edu (Jeffrey W. Tannehill)
- Newsgroups: comp.sys.sgi
- Subject: 8mm and dd
- Message-ID: <715275893@anthrax.cs.duke.edu>
- Date: 31 Aug 92 15:44:54 GMT
- Organization: Duke University Computer Science Dept.; Durham, N.C.
- Lines: 36
-
-
- We have an 8mm tape drive attached via a scsi cable to our SGI IRIS 4D.
- It seems to work as expected with the SGI backup and restore utilities and
- with the BSD dump and restore commands. However, whenever I try the dd
- command to write I get:
-
- > dd if=/etc/motd of=/dev/tape
- dd: writer error: Invalid argument
- 0+1 records in
- 0+1 records out
-
- Similarly, when trying to read the tape (just in case something actually went
- to tape) I get:
-
- >dd if=/dev/tape
- dd: read error: Invalid argument
- 0+0 records in
- 0+0 records out
-
- Next, if I try another blocksize, then I get another error when reading:
-
- >dd if=/dev/tape bs=1k
- dd: read error: No space left on device
- 0+0 records in
- 0+0 records out
-
- The man page for dd doesn't indicate that it works differently than the
- dd command I am accustomed to on a Sun or Decstation. Also, I tried the
- device names /dev/tape, /dev/nrtape, /dev/rmt/tps1d5nrns, and
- /dev/mt/tps1d5nrns. Has anyone had this problem? Is there some special options
- one needs to use with dd on an SGI to access a scsi 8mm tape device?
- Thanks for any help.
- --
- /*______________________________Jeff Tannehill_______________________________*
- * MAIL: Duke Dept. of Computer Science Internet: jwt@cs.duke.edu *
- * Durham, NC 27708 USA PHONE: +1 919 660 6500 */
-