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- From: shah@fnsony.fnal.gov (Hemant Shah)
- Newsgroups: comp.sys.sun.admin
- Subject: (SUMMARY) dump parameters for Exabyte 8500 tape drive.
- Message-ID: <2235@fnnews.fnal.gov>
- Date: 31 Aug 92 14:06:27 GMT
- Sender: news@fnnews.fnal.gov
- Reply-To: shah@fnalb.fnal.gov
- Organization: Fermi National Accelerator Laboratory, Batavia, IL
- Lines: 103
- Nntp-Posting-Host: fnsony.fnal.gov
-
- Earlier I had asked:
-
- >I am looking for "dump" command line options to use with Exabyte 8500 8mm
- >tape drive, which options should I use to dump in 2.3 GByte mode, and
- >5.0 GByte mode.
-
- and I got few answers and quite a few requests to post the summary of responses.
- Thanks to all who replied :-)
-
- Here's the responses I got.
-
- From hanson@fnal.fnal.gov:
-
- |>I assume you're asking about a Sun here?
- |>
- |>a. Only supported in 4.1.2 and later (you can munge up the kernel for
- |>4.1.1, but I wouldn't bother.)
- |>
- |>b. You need to use a different device node. High density is 8
- |>higher than low density. For example, /dev/rst0 and /dev/rst8.
- |>
- |>c. You can just adjust the length of tape parameters for the different
- |>proportional density.
- |>
- |>Look at the man page for dump. It give numbers for a 8200. Multiply
- |>the length by - oh, maybe 2.1 to get the length for an 8500.
-
- -------------------------------------------------------------------------------
-
- From gskalla@informatik.Uni-Osnabrueck.DE
-
- We were told to use
- dump -f /dev/st[0-7] ...
- to dump in 2.3 GByte mode and
- dump -f /dev/st[8-15] ...
- to dump in 5.0 GByte mode.
- Reason: from 4.1.1 to 4.1.2 SUN changed the device driver for tapes.
- (Just to notice, we did not get this hint from SUN, but from the vendor
- of the Exabyte!)
-
- Our system administrator told me, that it works quite fine.
-
- Good luck
- Gernot
-
- -------------------------------------------------------------------------------
-
- From canver@informatik.uni-ulm.de
-
- We are using the EXB 8500 with 120m tapes (5GB) with the command
-
- dump 0dsb 54000 24000 126 /dev/hd...
-
- I dunno how to dump in 2.3GB mode (for shorter tapes you just lower the
- size appropriately, e.g. 12000 instead of 24000 for 60m tapes (2.5GB), etc.)
-
- hope this helps
-
- cheers,
- Ercu
-
- -------------------------------------------------------------------------------
- From rjq@phys.ksu.edu
-
- Is this SunOS 4.1.2 or 4.1.1? With 4.1.2 you can choose the mode. From the
- st(4S) man page:
- /dev/rst[0-7]
- Standard EXB-8200 (2GB) Format
- /dev/rst[8-15]
- EXB-8500 (5GB) Format
-
-
- With 4.1.1 I believe you are stuck with what ever the drive defaults to.
- I think it defaults to 5GB unless the tape is already written in low density,
- and you are part way into the tape (ie the tape drive has had a chance to rec-
- ognize the low density).
-
-
- I have "archived" several past posts about exabyte tapes, I could bomb your
- mailbox with them if you want.
-
- -------------------------------------------------------------------------------
-
- From jh@cadre.com
-
- What version of the OS are you using? Support for the 8500 is built into
- 4.1.2. I'm still on 4.1.1, though, and in my dump command, I've got a
- density (I think) value of 108000 rather than the 54000 used on the 8200.
- This was given to me by a tech at Exabyte. Everything else remains the same.
-
-
- -------------------------------------------------------------------------------
-
- Thanks again to all who replied :-)
- --
- -------------------------------------------------------------------------------
- Hemant Shah | All the opinions expressed are my own
- Fermi National Accelerator Laboratory | and does not necessarily reflect
- Systems Integration Group | those of Fermilab.
- E-mail :shah@fnal.fnal.gov |
- Voice : (708) 840-8071 | I haven't lost my mind
- Fax : (708) 840-2783 | it's backed on tape somewhere.
- -------------------------------------------------------------------------------
-