Am 21. Jul, 2007 schw�tzte Randy Melder so:
This is what gets me: "If up to N-1 disks are removed (or crashes), all data are still intact. If there are spare disks available, and if the system (eg. SCSI drivers or IDE chipset etc.) survived the crash, reconstruction of the mirror will immediately begin on one of the spare disks, after detection of the drive fault." ( http://www.tldp.org/HOWTO/Software-RAID-HOWTO-1.html#ss1.4 )Does that mean the spare disk is empty until a fault or removal of one of the drives?
The spare disk is unavailable for any use other than being a spare. Essentially you have the space available of the smallest disk in the RAID 1 ( and spares ). The spare theoretically isn't in use, but maybe some RAIDs do some sort of spare updates during slow times. You shouldn't count on that.
I guess I'm just looking for something that says "Spare disks in the array maintain the same mirror at all times even after failure of N-1 disks."
Spare disks in the array should be counted as disks with no information on them, but unavailable for other use. Unless, of course, you're doing a security wipe after use, then you should presume they have the most sensitive data that was in the RAID :). ciao, der.hans -- # https://www.LuftHans.com/ http://www.CiscoLearning.org/ # "I interviewed Jonathan Winters once in the late '80s, it was as if he were # narrating a hallucination that I didn't see." -- Terry Gross, 03Aug2006
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