Subject: Re: Spontaneous Reboots at start of pass 0 in fsck -c2 on IDE controllers
To: Dave Burgess <>
From: Chris G. Demetriou <>
List: current-users
Date: 06/18/1994 14:51:45
While i have no comment yet on your problems (i'm going to be
trying it soon, though...), i've got one "fyi".

> When the filesystem was old 'type 0' format, the following occurred:

Actually, NetBSD (and Net/2 derivatives), have all used "type 1"
format, which is basically 4.3-but-pre-4.4 UFS.  type 0 is
4.2UFS, and it's still used by such beasts as A/UX for the Mac,
and Amix for the Amiga.

You can't safely mount type 0 file systems read-write, because of
the way the layout information has changed.  in the current systems,
however, you _can_ mount type 1 file systems read-write safely --
the new code is 100% backward compatible with them.  (FYI: all of
my machines, including sun-lamp, are running new kernels with
the "old" type 1 file systems.  I.e. there's no reason you should
be in any rush to upgrade to type 2...)