Friday, October 14, 2005

Sun warns against putting raw data on s2

It should be noted though, that Sun warns against putting raw data on s2,
since block zero contains the disk label, and labelling will overwrite the
beginning of your raw data.

Finally, I'll mention that I saw an interesting case many years ago, where
a disk with s0 consisting of the entire disk got unmounted rather abruptly
to say the least. fsck on s0 complained about a bad superblock, even with
any of the alternate superblock locations. However, I was able to fsck s2
with success, and then mount cleanly. Don't know enough about the guts of
the disk layout to know why this worked, but it did.

On the other hand, changing the length of s2 to something other than the
entire disk is an explicit no-no, according to Sun.

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