Re: ReiserFS: "Filesystem type unknown"

[Jochen Hoenicke]

Hello,

With Jim's help I tracked down the problem and could fix it (fix is in
CVS repository).  Grub's reiserfs driver was using a super block
header field to get the journal log size, but this field doesn't
contain any sane value.  In this case it had a random value.

BTW, the linux driver uses a fixed value defined in the
fsys_reiserfs.h file instead of looking into the super block fields.

  Jochen

PS: Here's the diff:
diff -u -r1.11 fsys_reiserfs.c
--- fsys_reiserfs.c     2001/09/24 08:43:38     1.11
+++ fsys_reiserfs.c     2001/10/05 13:10:56
@@ -620,8 +620,8 @@
   if (super.s_journal_block != 0)
     {
       INFO->journal_block = super.s_journal_block;
-      INFO->journal_block_count = super.s_journal_block_count;
-      if (INFO->journal_block_count == 0)
        INFO->journal_block_count = super.s_orig_journal_size;
       if (! is_power_of_two (INFO->journal_block_count))
        return 0;


On Oct 4, Jochen Hoenicke wrote:
> On Oct 2, Jim Caley wrote:
> > I had grub working with an ext2 partition, but now that I've converted 
> > this partition to reiserfs I can't seem to get grub to recognize it.
> >
> > grub> root (hd0,7)
> >   Filesystem type unknown, partition type 0x83
> 
> I think, grub doesn't understand the reiserfs super block.  I don't
> have a spare partition to test latest reiserfs, but if you would send
> me your reiser super block I can probably see where it fails.