RE: Single md physical device limit

On Monday August 19, ARechenberg@shermanfinancialgroup.com wrote:

Interesting, when I initially built my array (with RedHat raidtools-0.90
not mdctl/mdadm, on kernel 2.4.17) it stated that I could only stripe
across 12 devices.  Do you have any idea from which this number comes?
Is it an old limit?

Yes, some old limit.  I don't remember the exact details, they were
never important to me, but I think it involved some miscalculation
about how many entries would actually fit in the 4096 byte superblock.

Hopefully 2.6 will have a much higher limit (using an optional
different superblock format).

NeilBrown