Hi, I've been having very bad performance with an LSISAS2008 controller attached to 8 WD Caviar Black 1TB disks. So I swapped it out for an Apaptec RAID 6805 with the same disks and now my /dev/md2 won't start. May 13 17:14:37 zenon kernel: md: sdh3 does not have a valid v1.2 superblock, no t importing! May 13 17:14:37 zenon kernel: md: md_import_device returned -22 May 13 17:14:37 zenon kernel: md: sda3 does not have a valid v1.2 superblock, no t importing! May 13 17:14:37 zenon kernel: md: md_import_device returned -22 May 13 17:14:37 zenon kernel: md: sdf3 does not have a valid v1.2 superblock, no t importing! Etc... Both controllers are used without any configuration. I just use the separate disks for soft raid. Each disk is configured thus: Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x05022e04 Device Boot Start End Blocks Id System /dev/sda1 1 32 257008+ fd Linux raid autodetect /dev/sda2 33 17500 140311710 fd Linux raid autodetect /dev/sda3 17501 121601 836191282+ fd Linux raid autodetect And my raid config used to be: Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] [faulty] md2 : active raid6 sdc3[0] sdd3[7] sdf3[6] sdb3[5] sdh3[4] sda3[3] sdg3[2] sde3[1] 5017138176 blocks super 1.2 level 6, 512k chunk, algorithm 2 [8/8] [UUUUUUUU] bitmap: 0/7 pages [0KB], 65536KB chunk md1 : active raid6 sdc2[0] sdd2[7] sdf2[8] sdb2[5] sdg2[4] sdh2[3] sda2[2] sde2[1] 841863168 blocks super 1.2 level 6, 512k chunk, algorithm 2 [8/8] [UUUUUUUU] bitmap: 2/2 pages [8KB], 65536KB chunk md0 : active raid1 sdc1[0] sdd1[7] sdf1[6] sdh1[5] sde1[4] sdb1[3] sda1[2] sdg1[1] 256896 blocks [8/8] [UUUUUUUU] bitmap: 0/1 pages [0KB], 65536KB chunk unused devices: <none> Going back to the LSISAS2008 controller makes /dev/md2 come back. Any idea why the Adaptec wont let me use /dev/md2? Going into its bios configuration menu I see a JBOD mode but it seems each disk has to be "initialized" in order to be used in that mode. Meanwhile the disks are used in "legacy" mode: May 13 17:09:57 zenon kernel: scsi 0:0:0:0: Direct-Access Adaptec 6805 Legacy V1.0 PQ: 0 ANSI: 2 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
