On 27/07/17 17:11, Nigel Croxon wrote: > > Hello all, > > The device name referenced in the mdadm --examine --scan does not exist > when using metadata=1.2 and --name on the creation. > I am using metadata 0.9 as a bases to test against 1.2. > Am I fighting a udev rule? Did the symlink from /dev/md/TEST_MD to > /dev/md0 disappear? > > > If I start with METADATA=0.9 and specifying a --name > > # mdadm --create --verbose /dev/md0 --level=0 --metadata=0.9 > --raid-devices=2 --name=TEST_MD /dev/sdd /dev/sde > > with METADATA=0.9, there is no NAME field printed on DETAIL I don't think 0.9 metadata supports names ... > > # mdadm -D /dev/md0 > /dev/md0: > Version : 0.90 > Creation Time : Thu Jul 27 10:36:02 2017 > Raid Level : raid0 > Array Size : 293045760 (279.47 GiB 300.08 GB) > Raid Devices : 2 > Total Devices : 2 > Preferred Minor : 0 > Persistence : Superblock is persistent > > Update Time : Thu Jul 27 10:36:02 2017 > State : clean > Active Devices : 2 > Working Devices : 2 > Failed Devices : 0 > Spare Devices : 0 > > Chunk Size : 512K > > Consistency Policy : none > > UUID : 623d8bac:8819491b:e9034e5d:acd14f01 > Events : 0.1 > > Number Major Minor RaidDevice State > 0 8 48 0 active sync /dev/sdd > 1 8 64 1 active sync /dev/sde > > > The --examine --scan shows /dev/md0, and not /dev/md/TEST_MD. > # mdadm --examine --scan > ARRAY /dev/md0 UUID=65cb66eb:d8a0d9ff:85609b40:89383835 > > > Next, change the METADATA=1.2 and specifying a --name > # mdadm --create --verbose /dev/md0 --level=0 --metadata=1.2 > --raid-devices=2 --name=TEST_MD /dev/sdd /dev/sde > > With METADATA=1.2, there is a NAME field printed: > thinkstation:TEST_MD (local to host thinkstation) > > # mdadm -D /dev/md0 > /dev/md0: > Version : 1.2 > Creation Time : Thu Jul 27 11:13:02 2017 > Raid Level : raid0 > Array Size : 292784128 (279.22 GiB 299.81 GB) > Raid Devices : 2 > Total Devices : 2 > Persistence : Superblock is persistent > > Update Time : Thu Jul 27 11:13:02 2017 > State : clean > Active Devices : 2 > Working Devices : 2 > Failed Devices : 0 > Spare Devices : 0 > > Chunk Size : 512K > > Consistency Policy : none > > Name : thinkstation:TEST_MD (local to host thinkstation) > UUID : 591d68eb:5182a6e2:ead93be0:812f7fc6 > Events : 0 > > Number Major Minor RaidDevice State > 0 8 48 0 active sync /dev/sdd > 1 8 64 1 active sync /dev/sde > > The --examine --scan is shows /dev/md/TEST_MD and not /dev/md0. > > # mdadm --examine --scan > ARRAY /dev/md/TEST_MD metadata=1.2 > UUID=413a8ca9:a1edb21b:9eb8876d:784349ed name=thinkstation:TEST_MD > > This problem is, /dev/md/TEST_MD does not exist. /dev/md0 does. Is the array running? This is an educated guess on my part, but I think it's running the array that creates the symlink. > > mdadm --version > mdadm - v4.0-158-gcb91230 - 2017-07-10 > > Am I fighting udev rules? > Cheers, Wol -- 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
