Hi, Rob

IIRC, one of old MPE III release with "new private volume concepts" removable 7925 can be used for serial disk, acts like fast tape drive, basically logging transactions to disk serially (no direct access to specific sector).

Two decades ago, Private volume was big deal with unstable MPE OS
like system failure , (BSOD in MPE) :-<.

Once, system was crashed, dump the memory, restore only system volume, all the user file still reside on the Private Volume with safe,
so very fast way to recovering system from OS failure.

Win2000 guys said, they promote all the LOG files to another FAT drive out side of RAID, to Increase performance on W2K..
That was 2 decades ago technic... (deja ve???) ;-)

Cheers

Peter C.

>>> Rob Havens <[log in to unmask]> 10/01 11:24 AM >>>
Classic HP: logged to 7970E  (don't laugh)

New HP: would like to log to disk but don't want it in the public disk
domain because don't have raid or mirroring and if lose public spindle
then what's the purpose? (You lose the log file; unless I misunderstand
logging to disk).

Can you log to a private volume?  Thus if the log disk fails, you do a
fulldump and replace your logging disk drive.  If system drive(s) fails,
restore and recover.  Not very likely that both system drive and private
drive both fail at same time.

Once again, TIA