man md man mdadm I use RAID6. Happy with it so far, but haven't had a disk failure yet. RAID5 sucks because if you have 1 failed disk and 1 bad block on any other disk, you are hosed. Hope that helps. } -----Original Message----- } From: linux-raid-owner@xxxxxxxxxxxxxxx [mailto:linux-raid- } owner@xxxxxxxxxxxxxxx] On Behalf Of Michael Makuch } Sent: Friday, December 07, 2007 7:12 PM } To: linux-raid@xxxxxxxxxxxxxxx } Subject: Few questions } } I realize this is the developers list and though I am a developer I'm } not a developer } of linux raid, but I can find no other source of answers to these } questions: } } I've been using linux software raid (5) for a couple of years, having } recently uped } to the 2.6.23 kernel (FC7, was previously on FC5). I just noticed that } my /proc/mdstat shows } } $ cat /proc/mdstat } Personalities : [raid6] [raid5] [raid4] } md0 : active raid5 etherd/e0.0[0] etherd/e0.2[9](S) etherd/e0.9[8] } etherd/e0.8[7] etherd/e0.7[6] etherd/e0.6[5] etherd/e0.5[4] } etherd/e0.4[3] etherd/e0.3[2] etherd/e0.1[1] } 3907091968 blocks level 5, 64k chunk, algorithm 2 [9/9] [UUUUUUUUU] } [============>........] resync = 64.5% (315458352/488386496) } finish=2228.0min speed=1292K/sec } unused devices: <none> } } and I have no idea where the raid6 came from. The only thing I've found } on raid6 } is a wikipedia.org page, nothing on } http://tldp.org/HOWTO/Software-RAID-HOWTO.html } } So my questions are: } } - Is raid6 documented anywhere? If so, where? I'd like to take advantage } of it if } it's really there. } - Why does my array (which I configured as raid5) have personalities of } raid6 (I can understand why raid4 would be there)? } - Is this a.o.k for a raid5 array? } } Thanks } - } To unsubscribe from this list: send the line "unsubscribe linux-raid" in } the body of a message to majordomo@xxxxxxxxxxxxxxx } More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
