[ ... ]
>> * Can Linux MD do "abbreviated" read-modify-write RAID6
>> updates like for RAID5? [ ... ]
> No. (patches welcome).
Ahhhm, but let me dig a bit deeper, even if it may be implied in
the answer: would it be *possible*?
That is, is the double parity scheme used in MS such that it is
possible to "subtract" the old content of a page and "add" the
new content of that page to both parity pages?
[ ... ]
> The ideal config for a journalled filesystem is for put the
> journal on a separate smaller lower-latency device. e.g. a
> small RAID1 pair.
> In a previous work place I had good results with:
> RAID1 pair of small disks with root, swap, journal
> Large RAID5/6 array with bulk of filesystem.
Sound reasonable, except that I am allergic to RAID5 (except in
two cases) and RAID6 (in general). :-), but would work equally
well I guess with RAID10 and its delightful MD implementation.
[ ... ]
Thanks for the information!
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