[..]
> Just to clarify, unless you keep a database open on a
> floppy
> * usually 1 disk is mounted.
> * 2 disks are mounted during media change. The second
> disk is unmounted as soon as the OS notices that no
> open file handles are left. Usually before the syscall
> which noticed the media change returns.
> If open handles exist, then the second superblock is
> not destroyed, and allows recovery if the database
> wants to write to the open handle.
Leading to how many undead superblocks hanging around ?
This starts to remind me of Schrödinger's superblock. It's only
really dead upon interaction with user space. ;-)
Oliver
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This archive was generated by hypermail 2b29 : Fri Jun 23 2000 - 21:00:25 EST