karron@MCIRPS2.MED.NYU.EDU (10/14/90)
How do i get ansitape to recognize an alternate tape device ? It does not make sense for it to default to the qic device. Here is what I get: mcirps2:/usr/people/karron/D.Image/D.mri:356ansitape -c -f/dev/mt/xmnrtape * ansitape ioctl: Resource temporarily unavailable ansitape write: I/O error -f/dev/mt/xmnrtape: character device - skipped ansitape write: I/O error ansitape write: I/O error ansitape write: I/O error ansitape ioctl: Resource temporarily unavailable ansitape write: I/O error tape: I/O error hard write error: write aborted ansitape ioctl: Resource temporarily unavailable Exit 1 mcirps2:/usr/people/karron/D.Image/D.mri:357ansitape -c -f /dev/mt/xmnrtape * ansitape ioctl: Resource temporarily unavailable ansitape write: I/O error -f: character device - skipped /dev/mt/xmnrtape: character device - skipped ansitape write: I/O error ansitape write: I/O error ansitape write: I/O error ansitape ioctl: Resource temporarily unavailable ansitape write: I/O error tape: I/O error hard write error: write aborted ansitape ioctl: Resource temporarily unavailable Exit 1 What gives ? bru, tar, dd, cpio all work just fine. I am using a cypher tape drive and a xylogic 772 controller. The xmnrtape is a hard link to xmt0d0nr.1600. dan. +-----------------------------------------------------------------------------+ | karron@nyu.edu Dan Karron | | . . . . . . . . . . . . . . New York University Medical Center | | 560 First Avenue \ \ Pager <1> (212) 397 9330 | | New York, New York 10016 \**\ <2> 10896 <3> <your-number-here> | | (212) 340 5210 \**\__________________________________________ | | Please Note :Soon to move to dan@karron.med.nyu.edu 128.122.135.3 (Mid Oct)| +-----------------------------------------------------------------------------+
Dan Karron@UCBVAX.BERKELEY.EDU (02/19/91)
I am reading some ansi tapes on a cypher 9 track tape. Performance is terrible. The tape drive saws back and forth, moving only an inch or so each cycle. How can I improve performance ? I tried using bstream, but ansitape won't read from standard input. How can I determine the proper blocking factor to use to match tape blocks with host blocking buffers ? This is agony! It is taking hours to read each tape! Help ! dan. +-----------------------------------------------------------------------------+ | karron@nyu.edu (E-mail alias that will always find me) | | Fax: 212 263 7190 * Dan Karron, Research Associate | | . . . . . . . . . . . . . . * New York University Medical Center | | 560 First Avenue \*\ Pager <1> (212) 397 9330 | | New York, New York 10016 \**\ <2> 10896 <3> <your-number-here> | | (212) 263 5210 \***\_________________________________________ | | Main machine: karron.med.nyu.edu (128.122.135.3) IRIS 85GT | +-----------------------------------------------------------------------------+ NOTE PHONE NUMBER CHANGE: The Med Ctr has changed from 340 to 263 exchange.
olson@anchor.esd.sgi.com (Dave Olson) (02/20/91)
In <9102190812.AA12122@karron.med.nyu.edu> Dan Karron@UCBVAX.BERKELEY.EDU writes: | I am reading some ansi tapes on a cypher 9 track tape. Performance | is terrible. The tape drive saws back and forth, moving only an inch | or so each cycle. How can I improve performance ? I tried using | bstream, but ansitape won't read from standard input. How can | I determine the proper blocking factor to use to match tape blocks | with host blocking buffers ? | | | This is agony! It is taking hours to read each tape! Note that the default blocksize is only 2k. You might try using a larger block size, if that is appropriate. -- Dave Olson Life would be so much easier if we could just look at the source code.