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Re: bin/45166: UFS2 / FFSv2 confusion

The following reply was made to PR bin/45166; it has been noted by GNATS.

From: David Holland <>
Subject: Re: bin/45166: UFS2 / FFSv2 confusion
Date: Fri, 22 Jul 2011 15:48:10 +0000

 On Fri, Jul 22, 2011 at 03:40:05PM +0000, Havard Eidnes wrote:
  >  >  >          (FFS only with UFS2 superblock layout)
  >  >
  >  >  "UFS2 superblock layout" is description about superblock, not
  >  >  FS itself.  UFS1 (or FFSv1) can have UFS2 layout superblock.
  >  Hmm, to split hairs...  Do we have any tools which create an UFS2
  >  layout superblock but create an FFSv1 file system?
 Yes, it's the default.
 I had thought that tunefs could update the superblock type, and you
 needed to do this if you had an ancient fs, but now I can't see any
 evidence of this in either tunefs.8 or tunefs.c. What am I missing?
 (anyone? please fix the commented out chunk of mount.8 that I just
 David A. Holland

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