Michael Tokarev wrote:
Linux raid10 MODULE (which implements that standard raid10
LEVEL in full) adds some quite.. unusual extensions to that
standard raid10 LEVEL. The resulting layout is also called
raid10 in linux (ie, not giving new names), but it's not that
raid10 (which is again the same as raid1+0) as commonly known
in various literature and on the internet. Yet raid10 module
fully implements STANDARD raid10 LEVEL.
I will let Neil speak about what he meant by RAID10: whether it is raid10 +
weird extensions, or a generalization of drive/stripe layouts.
However if you want to be so anal about names and specifications: md raid 10
is not a _full_ 1+0 implementation. Consider the textbook scenario with 4 drives:
(A mirroring B) striped with (C mirroring D)
When only drives A and C are present, md raid 10 with near offset will not
start, whereas "standard" RAID 1+0 is expected to keep clunking away.
Peter
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