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- Path: sparky!uunet!news.univie.ac.at!alijku11!schiffer
- Message-ID: <19921211.234832237103.NETNEWS@ALIJKU11>
- Date: Friday, 11 Dec 1992 23:48:32 CET
- Newsgroups: comp.sys.sun.hardware
- Subject: Re: DAT drive on Sun
- From: Stefan Schiffer <schiffer@swe.uni-linz.ac.at>
- X-UserAgent: Nuntius v1.1.1d11
- X-XXMessage-ID: <A74ED6E480022A2A@stefan.mac.swe.uni-linz.ac.at>
- X-XXDate: Fri, 11 Dec 92 22:38:12 GMT
- References: <1992Dec07.211059.26049@dlogics.com>
- Distribution: world
- Organization: Universitaet Linz, Austria
- Nntp-Posting-Host: 140.78.42.42
- Lines: 36
-
- In article <1992Dec07.211059.26049@dlogics.com> John Sasso,
- jfs@dlogics.com writes:
- >I have a generic 4mm DAT tape drive connected to the SCSI of my
- >Sparc ELC, running 4.1.3. It seems to work fine, except that I can
- >only get about 600MB per tape instead of 1.2GB. I'm using Maxell DM60
- >tapes. I get the exact same responce whether I use rst0 or rst8
- >(Sun's suggestion, "high density driver"). Does anyone have any
- >suggestions? (Besides buying an 8mm!)
- >
- >John F Sasso
-
-
-
- In "Installing and Configuring HP35470/80A DDS Tape Drives" HP writes:
-
- "Other Hints for SUN
-
- When using the "cpio" command, be sure to set the block size option (-B)
- so
- that you use a block size of 5120 or greater. This will improve
- performance
- significantly.
-
- When using the "dump" command, set the tape size (-s) and density (-d)
- parameters
- to 15000. This will allow you to fill a 90m tape. The defaults for the
- "dump"
- command are setup for QIC drives, and will result in storing only about
- 600 Mbytes."
-
- I may add, that for 60m tapes a tape size of 10000 works fine and that a
- block size
- of 5120 did not show any improved performance when using dump.
-
-
- Stefan Schiffer
-