Subject: file system annoyances and such...
To: macbsd general list <macbsd-general@NetBSD.ORG>
From: Erik Vogan <email@example.com>
Date: 07/09/1995 23:11:45
This message is getting cross posted for a somewhat legitimate
reason, so if you don't like drivel and you are:
A) a general macBSD user with some knowledge of silverlining
partitioning software, please read the end of the message
or B) a macBSD developer with some understanding of the file system
and it's intricacies, please read the whole message.
Now, on to the question and the details. I've got a fully (sort
of) functional install of macBSD 1.0B, and I was happily compiling
-current for personal use and gratification. I have a 60 meg root, a 230
meg /usr, and a 180 meg /home. All -current work takes place on the
/home partition. I decided to mess around with a custom config file,
config'ed, make'd depends, make'd, and then copied my -current to the
root to test. I've done this all before, so I expected this to work.
The kernel booted with booter 1.6, and then immediately crashed
because I'd not defined KTRACE or DEBUG (I forget which was not actually
defined!). I hit the debug switch, got no response, hit the hard reboot
switch, got back to macOS, booted into 1.0B kernel, and proceeded to
recompile with KTRACE and DEBUG enabled.
So what ?? Well, during the compile I received a panic and dropped to
the kernel debugger. I don't remember the initial panic, but I rebooted,
and had to run fsck manually. I got many dupped inodes, many pathnames
that were to be removed, many dup/bad inodes to be cleared, and all the
tables needed to be rebuilt. These errors were all reported on the /home
partition where the compile had been taking place. No matter how many
times I ran fsck manually, it complained that there were missing bits in
the allocation table, did I want to fix them ? [ I ran it twelve times in
a row to be sure! ].
I rebooted, recopied the -current sources files from the mac
side, and the copied died with a panic: trying to free free block. More
fsck manually, more dups, pathnames to clear, dups/bad to clear, tables
to be rebuilt, etc. Repeat five to six times. Suspicion starting to
dawn - something is wrong here! Then, the problem spread to the /usr
So ... I did what any person who has sold himself on an
experimental OS would do - I punted. I brought up the macOS mkfs, did a
mkfs on all three volumes (/, /usr, /home, but NOT swap), and set to
reinstalling all the base distribution binaries + X11. Half way through
installing misc.tgz the installer bails with a panic: trying to free free
Why would this happen if I've remade the file systems ?? Haven't
I obliterated the table that should point to this information ?? Haven't
I essential reformated this partition ?? Why am I still getting the
panic ?? Can this be eradicated by re-initializing (note: not
formatting!) ?? Please read on ...
------------------- begin silly thoughts on mac formatting SW -----------
For those of you just joining us ... assume I want to totally
wipe a unix partition with mac formatting tools. Can I simply select
reinitialize in my drive formatting package (silverlining 5.6/23) ?? Or
must I change the partition type to macOS, reinitialize, change the
partition type back to AU/X, and the re-mkfs ?? Will this have any nasty
side effects on partition order (i don't think so) or other partitions on
the drive ??
Any help and explanation would really be most appreciated. As
well, the next time I see a panic: freeing free block - is there a
special fsck mode for dealing with this ??
~ Of all the races in all of the Galaxy who could have come and said a big
hello to the planet Earth, he thought, didn't it just have to be the Vogons.