From: ron@ronnatalie.com (Ronald Natalie)
Subject: [TUHS] pre-FSCK days
Date: Tue, 6 Jan 2015 17:02:49 -0500 [thread overview]
Message-ID: <1CA66E3E-8596-460B-BF47-5D23A3E3211B@ronnatalie.com> (raw)
In-Reply-To: <CAC20D2PdYXD22Fqz=Eb5J4tMYsGwvx7ecV7ffTsTwqwekHk8Zw@mail.gmail.com>
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Yep I remember those days. In order to get signed on to work in the UNIX computer center I had to demonstrate I knew the structure of the V6 filesystem and what icheck and dcheck reported, what the common errors were, and how to fix them.
Two things changed. First FSCK was wriiten, but even to make that useful, some fixes were done to the ordering of operations in the kernel so that the file system wouldn’t be left in a degenerate state after crashes. Before these changes were made inode link counts less than the number of directory links and dups in free were common. After the changes to the FS, you’d get missing blocks and a few 0-0 inodes (or ones where the links count was higher than the links). These while wasteful were not going to cause problems.
next prev parent reply other threads:[~2015-01-06 22:02 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-31 6:22 [TUHS] Illumos ) Larry McVoy
2014-12-31 9:28 ` Wesley Parish
2014-12-31 13:13 ` John Cowan
2014-12-31 17:42 ` Diomidis Spinellis
2014-12-31 20:32 ` Clem Cole
2014-12-31 20:36 ` Larry McVoy
2014-12-31 22:19 ` Jacob Ritorto
2014-12-31 22:42 ` Larry McVoy
2014-12-31 22:50 ` Larry McVoy
2015-01-01 1:17 ` Larry McVoy
2015-01-01 1:34 ` Erik E. Fair
2015-01-05 12:02 ` Tim Bradshaw
2015-01-05 17:04 ` Jacob Ritorto
2015-01-06 4:54 ` Andy Kosela
2015-01-06 11:10 ` Kurt H Maier
2015-01-06 15:37 ` Tim Bradshaw
2015-01-09 9:23 ` Jose R. Valverde
2015-01-06 21:58 ` Clem Cole
2015-01-06 22:02 ` Ronald Natalie [this message]
2015-01-07 1:53 ` Dave Horsfall
2015-01-07 16:26 ` Clem Cole
2015-01-07 18:32 ` scj
2015-01-16 8:40 ` [TUHS] sync; sync; sync; halt (was: Re: Illumos )) Tom Ivar Helbekkmo
2015-01-16 13:39 ` random832
2015-01-16 14:14 ` Brantley Coile
2014-12-31 9:46 ` [TUHS] Illumos ) arnold
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