From: lyndon@orthanc.ca (Lyndon Nerenberg)
Subject: [TUHS] Determining what was on a tape back in the day
Date: Sun, 19 Nov 2017 14:38:53 -0800 (PST) [thread overview]
Message-ID: <alpine.BSF.2.21.1711191434190.6984@vm.orthanc.ca> (raw)
In-Reply-To: <alpine.BSF.2.21.1711200854090.780@aneurin.horsfall.org>
> The early Sun boxes used to hang when rewinding the cartridge tape, because
> the controller didn't release the Multibus; the stingy Lionel Singer used to
> sell the 3/50 as cheap servers...
The Convergent Tech MiniFrame had a similar bug with the QIC tape drive.
If you sent it an interrupt during a rewind (e.g. ^C a cpio after the
extract was done, but before the rewind/close finished), it would block
the tape device from any further use.
That was my first expedition into non-API UNIX kernel hacking, writing a
program that would reach into the kernel to clear the 'busy' bit on the
tape device.
--lyndon
next prev parent reply other threads:[~2017-11-19 22:38 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-19 13:41 Noel Chiappa
2017-11-19 14:55 ` Clem cole
2017-11-19 21:00 ` William Corcoran
2017-11-19 21:19 ` Ron Natalie
2017-11-19 22:00 ` Dave Horsfall
2017-11-19 22:38 ` Lyndon Nerenberg [this message]
2017-11-19 22:40 ` Ronald Natalie
2017-11-19 23:41 ` Dave Horsfall
2017-11-20 1:02 ` Ronald Natalie
2017-11-20 1:18 ` Dave Horsfall
2017-11-20 18:12 ` Random832
2017-11-20 23:22 ` Dave Horsfall
2017-11-20 23:35 ` William Pechter
2017-11-21 0:01 ` Ron Natalie
2017-11-20 19:02 ` Paul Winalski
2017-11-19 14:55 ` Will Senn
-- strict thread matches above, loose matches on Subject: below --
2017-11-20 19:42 Noel Chiappa
2017-11-20 17:00 Noel Chiappa
2017-11-20 16:01 Noel Chiappa
2017-11-20 17:37 ` Will Senn
2017-11-19 20:46 Steve Simon
2017-11-19 18:45 Noel Chiappa
2017-11-19 17:49 Noel Chiappa
2017-11-19 18:35 ` Arthur Krewat
2017-11-18 19:23 Noel Chiappa
2017-11-18 21:32 ` Will Senn
2017-11-18 21:49 ` Warren Toomey
2017-11-18 18:34 Noel Chiappa
2017-11-18 18:37 ` Ronald Natalie
2017-11-18 18:40 ` Ronald Natalie
2017-11-18 21:51 ` Dave Horsfall
2017-11-18 21:07 ` Will Senn
2017-11-18 22:53 ` Clem Cole
2017-11-19 1:47 ` Will Senn
2017-11-18 16:39 Will Senn
2017-11-18 18:57 ` Clem Cole
2017-11-18 20:03 ` Don Hopkins
2017-11-18 22:37 ` Dave Horsfall
2017-11-18 23:16 ` Don Hopkins
2017-11-18 23:35 ` Arthur Krewat
2017-11-19 0:35 ` Steve Nickolas
2017-11-19 0:42 ` Don Hopkins
2017-11-19 1:04 ` Clem cole
2017-11-19 16:20 ` Arthur Krewat
2017-11-20 2:33 ` Lawrence Stewart
2017-11-18 21:26 ` Will Senn
2017-11-18 22:39 ` Clem Cole
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