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- From: artn@bert.eecs.uic.edu (Ellyn Sandor)
- Subject: HELP: Change blocksize on 8mm tape on RS/6000
- Message-ID: <1992Aug19.171332.15803@bert.eecs.uic.edu>
- Keywords: 8mm Tape RS/6000 Blocksize
- Organization: University of Illinois at Chicago
- Date: Wed, 19 Aug 1992 17:13:32 GMT
- Lines: 28
-
-
- Is there any way to change the blocksize on an RS/6000 8mm
- tape drive? After a lot of messing around, I finally figured out
- that one of the problems with what I'm working on is that if I try
- to write() a record with a number of bytes that is not a multiple of
- 1024 bytes, I get an "bad argument" message. Is there a switch for
- this, or do I have to work with it?
- I am trying to emulate tape formats for graphic arts systems,
- including the LV3 format and DDES. The LV3 format I was trying to write
- wanted a blocksize of 36000 bytes, and DDES wants a bunch of 80 byte
- headers written.
- Or... is this a dumb question? Are 8mm tapes constrained
- by convention to blocksizes that are multiples of 1K? In other words,
- do I just THINK the computer on the other end wants another blocksize,
- but really, I should just be padding out the data?
- (Oh, yeah, if anyone is familiar with DDES, do the VOL1, HDR1,
- UHL1, etc records have to be (a) 80 byte blocks (b) padded to 1024 byte
- blocks with one of these records in each block or (c) all the 80 byte
- blocks lumped together in one 1024 byte block? The ANSI standard does
- not seem to deal with this, although the writing is sort of dense...)
-
- Thanks in advance!
- Stephan Meyers
- --
- --
- Stephan Meyers | artn@uicbert.eecs.uic.edu
- (Art)^n Laboratories, inventors of the Stealth Negative PHSCologram
- (312) 567-3762
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