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- Path: sparky!uunet!mcsun!sun4nl!star.cs.vu.nl!newshost.cca.vu.nl!rvdp
- From: rvdp@sow.econ.vu.nl (Ronald van der Pol)
- Newsgroups: comp.unix.sysv386
- Subject: Re: how to write 525MB to Wangtek 525ES on Dell 2.1?
- Message-ID: <rvdp.714046351@yam>
- Date: 17 Aug 92 10:12:31 GMT
- References: <rvdp.713829991@yam> <Bt14A9.4p0@gator.rn.com>
- Sender: news@cca.vu.nl
- Organization: SOW-VU, Amsterdam, The Netherlands
- Lines: 33
-
- larry@gator.rn.com (Larry Snyder) writes:
-
- >rvdp@sow.econ.vu.nl (Ronald van der Pol) writes:
-
- >>We have a Wangtek 525ES SCSI cartridge tape drive which should be
- >>able to write various formats (525, 250, 150 MB). But how do you
- >>choose the format? There don't seem to be different special files
- >>for different formats. So how should it be done?
-
- >I belive the tape and drive determine this -- ie: put a 150 meg tape
- >in the drive will yield 250 megs, a 60 meg will yield 120 megs
-
- Several people gave this answer. However, I have tried the following
- script:
-
- #! /bin/sh
- TAPE=/dev/rmt/c0s0n
- count=1
- while dd if=/dev/zero of=$TAPE bs=1024k count=25
- do
- echo $count
- count=`expr $count + 1`
- done
-
- I used the Wangtek 5525ES tape drive and a DC6525 tape. The script
- wrote 9 25MB files and 13 records of the 10th file. So about 238 MB
- was written (with 9 FileMarks?). After a 'mt rewind' and a 'mt fsf 9'
- the tape looks to be positioned at the end of the media. So how much
- is written to the tape, 250 MB or 525 MB?
-
- --
- Ronald van der Pol
- rvdp@sow.econ.vu.nl
-