CURRENT: supeblock hash failure - CURRENT wrecking disks

[Poul-Henning Kamp]

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In message <39FB31E6-A8EC-484C-B297-39C19A787E44 at gmail.com>, Enji Cooper writes
:

There is an "interesting" failure-mechanism when you move a disk
between 13/current and older systems which do not support ufs-hashes.

It will be prudent to make 11 and 12 clear the "use hashes" flags
in the superblocks of all filesystems they mount R/W, to limit
the amount havoc this will cause when people start playing with 13.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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