Hi Hugo, Am Samstag, 9. März 2013 schrieb Hugo Mills: > Some time ago, and occasionally since, we've discussed altering the > "RAID-n" terminology to change it to an "nCmSpP" format, where n is the > number of copies, m is the number of (data) devices in a stripe per copy, > and p is the number of parity devices in a stripe. > > The current kernel implementation uses as many devices as it can in > the striped modes (RAID-0, -10, -5, -6), and in this implementation, > that is written as "mS" (with a literal "m"). The mS and pP sections are > omitted if the value is 1S or 0P. > > The magic look-up table for old-style / new-style is: > > single 1C (or omitted, in btrfs fi df output) > RAID-0 1CmS > RAID-1 2C > DUP 2CD
What does the "D" in "2CD" mean? Its not explained above, unless I miss something. > RAID-10 2CmS > RAID-5 1CmS1P > RAID-6 1CmS2P I think its great to clarify the RAID-level terminology, but I find the new notation a bit, hmmm, cryptic. Maybe for displaying it would be nice to show a more verbose format like 2 copies, many stripes, 1 parity (1CmS1P) by default and the abbreviated one in parentheses? Any other idea to make it less cryptic? Thanks, -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
