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- From: brtmac@maverick.ksu.ksu.edu (Brett McCoy)
- Newsgroups: comp.sys.sun.admin
- Subject: Re: Exabyte 8500 - Dump parameters
- Date: 27 Jul 92 09:49:33
- Organization: Kansas State University
- Lines: 28
- Message-ID: <BRTMAC.92Jul27094933@maverick.ksu.ksu.edu>
- References: <25876.9207241150@thor.cf.ac.uk> <1992Jul27.084023.22925@ericsson.se>
- NNTP-Posting-Host: maverick.ksu.ksu.edu
- In-reply-to: etxorst@eos.ericsson.se's message of 27 Jul 92 08:40:23 GMT
-
- In article <1992Jul27.084023.22925@ericsson.se> etxorst@eos.ericsson.se (Torsten Lif) writes:
-
- >>I just got off the phone to our Exabyte drive suppliers technical
- >>department, according to them using /dev/rstn+8 for 5GB density is fine,
- >>as long as the tape is new. If your tape has been used on an Exabyte
- >>8200 unit the new 8500 drive will continue to use the tape as a 2.3 GB
- >>tape.
- >
- >Yes-and-no. Addressing /dev/nrst(n+8) makes no difference on those of
- >our machines that run SunOS 4.1.1, but on this machine (an SS10/41
- >running SunOS 4.1.3-beta) it works as described. I haven't yet had time
- >to try it on 4.1.2 and I don't know if patches for the older OS
- >versions are available. Can anyone else shed some light on this?
-
- According to the EXB-8500 Users Manual the 8500, when positioned at
- PBOT will write at whichever density you tell it to. Under SunOS
- 4.1.2 the tape devices /dev/{r,nr}st[0-7] are 8200 format and
- /dev/{r,nr}st[8-15] are 8500 format. More information is available
- from 'man st'. If you write to an EXB-8500 anywhere but the beginning
- it will ignore the density setting you tell it and will write at the
- same density the rest of the tape has been written at.
-
- Under SunOS 4.1.1 and below there is no support for 8500 drives which
- is why it will write 8200 format if the tape was already written. I
- believe that if you don't tell the drive what to do it assumes that
- you want to use the format that is already on the tape.
-
- ++Brett;
-