> > As for why you cannot add the PATA drive - it seems to fail, implying a > > write error when writing to it??? > > It doesn't seem to fail. I can add it without the Write mostly > switch and it does fine... > > Well, I'll be hornswaggled! I just tried it again and this time it > worked. I tried it several times before on all three partitions, and it > would always mark the partition faulty when I used the -W switch. > > > More info (logs etc) required. > > When I looked previously and again just now, I don't see anything > unusual from then: > > Dec 23 11:36:24 Backup kernel: [ 551.023531] md: recovery of RAID array > md1 > Dec 23 11:36:24 Backup kernel: [ 551.023531] md: minimum _guaranteed_ > speed: 1000 KB/sec/disk. > Dec 23 11:36:24 Backup kernel: [ 551.023531] md: using maximum available > idle IO bandwidth (but not more than 200000 KB/sec) for recovery. > Dec 23 11:36:24 Backup kernel: [ 551.023531] md: using 128k window, over > a > total of 6144816 blocks. > Dec 23 11:37:04 Backup kernel: [ 595.374568] md: bind<hda2> > Dec 23 11:37:05 Backup kernel: [ 595.686827] md: delaying recovery of md2 > until md1 has finished (they share one or more physical units) > Dec 23 11:37:16 Backup kernel: [ 608.666908] md: bind<hda3> > Dec 23 11:37:17 Backup kernel: [ 608.951395] md: delaying recovery of md3 > until md1 has finished (they share one or more physical units) > Dec 23 11:43:28 Backup kernel: [ 1014.009182] md: md1: recovery done. > Dec 23 11:43:28 Backup kernel: [ 1014.117880] md: delaying recovery of md3 > until md2 has finished (they share one or more physical units) > Dec 23 11:43:28 Backup kernel: [ 1014.117493] md: recovery of RAID array > md2 > Dec 23 11:43:28 Backup kernel: [ 1014.117496] md: minimum _guaranteed_ > speed: 1000 KB/sec/disk. > Dec 23 11:43:28 Backup kernel: [ 1014.117498] md: using maximum available > idle IO bandwidth (but not more than 200000 KB/sec) for recovery. > Dec 23 11:43:28 Backup kernel: [ 1014.117502] md: using 128k window, over > a > total of 277442414 blocks. > Dec 23 18:11:30 Backup kernel: [25686.451020] md: md2: recovery done. > Dec 23 18:11:30 Backup kernel: [25686.627333] md: recovery of RAID array > md3 > Dec 23 18:11:30 Backup kernel: [25686.627333] md: minimum _guaranteed_ > speed: 1000 KB/sec/disk. > Dec 23 18:11:30 Backup kernel: [25686.627333] md: using maximum available > idle IO bandwidth (but not more than 200000 KB/sec) for recovery. > Dec 23 18:11:30 Backup kernel: [25686.627333] md: using 128k window, over > a > total of 204796548 blocks. > Dec 23 22:16:36 Backup kernel: [41884.541659] md: md3: recovery done. Oops! 'Sorry, I was on the wrong server. The server with the PATA drives also allowed me to add with a -W switch this time, but the logs on it show even less: RAID-Server:/tmp# grep "Dec 26 01:1" /var/log/kern.log.1 Dec 26 01:11:16 RAID-Server kernel: [22268.711641] md: unbind<hda1> Dec 26 01:11:16 RAID-Server kernel: [22268.711641] md: export_rdev(hda1) Dec 26 01:11:30 RAID-Server kernel: [22284.169577] md: bind<hda1> Dec 26 01:12:13 RAID-Server kernel: [22330.315824] md: unbind<hda1> Dec 26 01:12:13 RAID-Server kernel: [22330.315824] md: export_rdev(hda1) Dec 26 01:12:41 RAID-Server kernel: [22360.766707] md: bind<hda1> Dec 26 01:15:05 RAID-Server kernel: [22527.168622] md: unbind<hda1> Dec 26 01:15:05 RAID-Server kernel: [22527.168622] md: export_rdev(hda1) And then when I issued the command without the -W Dec 26 01:15:46 RAID-Server kernel: [22575.663301] md: bind<hda1> Dec 26 01:15:46 RAID-Server kernel: [22575.683991] RAID1 conf printout: Dec 26 01:15:46 RAID-Server kernel: [22575.683994] --- wd:1 rd:2 Dec 26 01:15:46 RAID-Server kernel: [22575.683996] disk 0, wo:1, o:1, dev:hda1 Dec 26 01:15:46 RAID-Server kernel: [22575.683997] disk 1, wo:0, o:1, dev:sda1 Dec 26 01:15:46 RAID-Server kernel: [22575.684060] md: recovery of RAID array md1 Dec 26 01:15:46 RAID-Server kernel: [22575.684067] md: minimum _guaranteed_ speed: 1000 KB/sec/disk. Dec 26 01:15:46 RAID-Server kernel: [22575.684069] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for recovery. Dec 26 01:15:46 RAID-Server kernel: [22575.684072] md: using 128k window, over a total of 401580 blocks. Dec 26 01:15:55 RAID-Server kernel: [22586.500912] md: md1: recovery done. Dec 26 01:15:55 RAID-Server kernel: [22586.734405] RAID1 conf printout: Dec 26 01:15:55 RAID-Server kernel: [22586.734410] --- wd:2 rd:2 Dec 26 01:15:55 RAID-Server kernel: [22586.734413] disk 0, wo:0, o:1, dev:hda1 Dec 26 01:15:55 RAID-Server kernel: [22586.734415] disk 1, wo:0, o:1, dev:sda1 -- 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