On Monday December 15, jnelson-linux-raid@xxxxxxxxxxx wrote: > On Mon, Dec 15, 2008 at 3:33 PM, Neil Brown <neilb@xxxxxxx> wrote: > > On Monday December 15, jnelson-linux-raid@xxxxxxxxxxx wrote: > >> > >> Aha! This explains a question I raised in another email. What > >> happened there is a previously fully active member of the raid got > >> added, somehow, as a spare, via --incremental. That's when the entire > >> raid thought it needed to be rebuilt. How did that (the device being > >> treated as a spare instead of as a previously fully active member) > >> happen? > > > > It is hard to guess without details, and they might be hard to collect > > after the fact. > > Maybe if you have the kernel logs of when the server rebooted and the > > recovery started, that might contain some hints. > > I hope this helps. Yes it does, though I generally prefer to get more complete logs. If I get the surrounding log lines then I know what isn't there as well as what is - and it isn't always clear at first which bits will be important. The problem here is that --incremental doesn't provide the --re-add functionality that you are depending on. That was an oversight on my part. I'll see if I can get it fixed. In the mean time, you'll need to use --re-add (or --add, it does the same thing in your situation) to add nbd0 to the array. NeilBrown > > Prior to the reboot: > > Dec 15 15:19:39 turnip kernel: md: md11: recovery done. > Dec 15 15:19:39 turnip kernel: RAID1 conf printout: > Dec 15 15:19:39 turnip kernel: --- wd:2 rd:2 > Dec 15 15:19:39 turnip kernel: disk 0, wo:0, o:1, dev:nbd0 > Dec 15 15:19:39 turnip kernel: disk 1, wo:0, o:1, dev:sda > > During booting: > > <6>raid1: raid set md11 active with 1 out of 2 mirrors > <6>md11: bitmap initialized from disk: read 1/1 pages, set 1 bits > <6>created bitmap (10 pages) for device md11 > > After boot: > > Dec 15 15:34:38 turnip kernel: md: bind<nbd0> > Dec 15 15:34:38 turnip kernel: RAID1 conf printout: > Dec 15 15:34:38 turnip kernel: --- wd:1 rd:2 > Dec 15 15:34:38 turnip kernel: disk 0, wo:1, o:1, dev:nbd0 > Dec 15 15:34:38 turnip kernel: disk 1, wo:0, o:1, dev:sda > Dec 15 15:34:38 turnip kernel: md: recovery of RAID array md11 > Dec 15 15:34:38 turnip kernel: md: minimum _guaranteed_ speed: 1000 > KB/sec/disk. > Dec 15 15:34:38 turnip kernel: md: using maximum available idle IO > bandwidth (but not more than 200000 KB/sec) for recovery. > Dec 15 15:34:38 turnip kernel: md: using 128k window, over a total of > 78123988 blocks. > > /dev/nbd0 was added via --incremental (mdadm 3.0) > -- 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
