Ignoring CPU, filesystem, and library limitations, what is the theoretical
maximum size of a raid device?
The raid superblock appears to store the block size of each physical device
in an unsigned 32-bit integer allowing a maximum physical device size of
4 terabytes. If the stock raid device code is used, limiting the maximum
number of physical devices per raid device to 12, and we configure all twelve
drives to be used in a raid-0 array, is it true that in theory the raid device
is 48 terabytes large (52,776,558,133,248 bytes).
I would like to believe that my calculations are correct but I'm highly
skeptical; seeing how the multidisk source only uses 64-bit integers for the
event counter. This leads me to believe that the maximum size of a raid
device is limited to the 32-bit integer used to store the physical device
size...hence 4 terabytes is the maximum.
Can anyone give me an authoritative answer or at least a hint as to where I
miscalculated?
-kral
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Brian M. Kral [EMAIL PROTECTED]
REALM Information Technologies, LLC www.realminfo.com
Norcross, GA
