On Thu, 8 May 2003, Kirk McKusick wrote: > Your proposed patch would work much better. There is a small > possibility that it would stomp a boot block that just happened > to have the filesystem magic number at that location, but the > chances of that seem pretty remote. It does not address the > alternate superblock issue. The first UFS1 alternate is 32 > sectors (16K) in from the beginning of the disk. That alternate > also remains untouched by UFS2. So, someone manually running > fsck will be given the opportunity to look for alternate > superblocks and will find that one and *still* end up messing > up the filesystem. Well, Unix always gives you enough rope to hang yourself :-) > Indeed to be completely safe, you would need to look up every alternate > superblock and zero out its magic number (see the last for-loop in > mkfs() for details on how this is done). Ok Kirk, thanks for your patience so far. I'm trying to come up with an extended patch tomorrow. best regards, le -- Lukas Ertl eMail: l.ertl_at_univie.ac.at UNIX-Systemadministrator Tel.: (+43 1) 4277-14073 Zentraler Informatikdienst (ZID) Fax.: (+43 1) 4277-9140 der Universität Wien http://mailbox.univie.ac.at/~le/Received on Thu May 08 2003 - 12:25:18 UTC
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