On 19/09/19 21:45, Liviu Petcu wrote: > Hello, > > Please let me know if in this situation detailed below, there are chances of restoring the RAID 10 array and how I can do it safely. > Thank you! This is linux raid 10, not some form of raid 1+0? That's what it looks like to me. I notice it says the array is active! That I think is good news! Can you mount it read-only and read it? I would be surprised if you can't, which means the array is running fine in degraded mode. NOT GOOD but not a problem provided nothing further goes wrong. I notice it's also version 0.9 - is it an old array? Have the drives themselves failed? (which I guess is probably the case :-( I guess the drives effectively have just the one partition - 2 - and 1 is something unimportant? Okay, my take on the situation is that you have two failed drives. The array is okay but degraded, which is a dangerous position to be in. You need to replace those failed drives asap. BUT. The array is old, which means a recovery could tip the remaining drives over the edge. Can you get a SMART report off the drives? If the other drives look healthy we can risk a rebuild, if they don't we need to shut the array down and copy them pronto. Either way you need new drives, which is a good time to think about your next move. You've got raid10 - do you want to get some larger drives and go raid-6? Do you want to increase your disk capacity? etc etc. Then we can think about either just replacing the failed drives, or going the whole hog and moving on to a new array. Cheers, Wol > > Liviu Petcu > > # mdadm --examine /dev/sd[abcdef]2 > > /dev/sda2: > Magic : a92b4efc > Version : 0.90.00 > UUID : df4ee56a:547f33ee:32bb33b1:ae294b6e > Creation Time : Fri Aug 14 12:11:48 2015 > Raid Level : raid10 > Used Dev Size : 1945124864 (1855.02 GiB 1991.81 GB) > Array Size : 5835374592 (5565.05 GiB 5975.42 GB) > Raid Devices : 6 > Total Devices : 6 > Preferred Minor : 1 > > Update Time : Thu Sep 19 21:05:15 2019 > State : active > Active Devices : 4 > Working Devices : 4 > Failed Devices : 2 > Spare Devices : 0 > Checksum : e528c455 - correct > Events : 271498 > > Layout : offset=2 > Chunk Size : 256K > > Number Major Minor RaidDevice State > this 5 8 2 5 active sync /dev/sda2 > > 0 0 8 18 0 active sync /dev/sdb2 > 1 1 0 0 1 faulty removed > 2 2 0 0 2 faulty removed > 3 3 8 66 3 active sync /dev/sde2 > 4 4 8 82 4 active sync /dev/sdf2 > 5 5 8 2 5 active sync /dev/sda2 > /dev/sdb2: > Magic : a92b4efc > Version : 0.90.00 > UUID : df4ee56a:547f33ee:32bb33b1:ae294b6e > Creation Time : Fri Aug 14 12:11:48 2015 > Raid Level : raid10 > Used Dev Size : 1945124864 (1855.02 GiB 1991.81 GB) > Array Size : 5835374592 (5565.05 GiB 5975.42 GB) > Raid Devices : 6 > Total Devices : 6 > Preferred Minor : 1 > > Update Time : Thu Sep 19 21:05:15 2019 > State : active > Active Devices : 4and > Working Devices : 4 > Failed Devices : 2 > Spare Devices : 0 > Checksum : e528c45b - correct > Events : 271498 > > Layout : offset=2 > Chunk Size : 256K > > Number Major Minor RaidDevice State > this 0 8 18 0 active sync /dev/sdb2 > > 0 0 8 18 0 active sync /dev/sdb2 > 1 1 0 0 1 faulty removed > 2 2 0 0 2 faulty removed > 3 3 8 66 3 active sync /dev/sde2 > 4 4 8 82 4 active sync /dev/sdf2 > 5 5 8 2 5 active sync /dev/sda2 > /dev/sde2: > Magic : a92b4efc > Version : 0.90.00 > UUID : df4ee56a:547f33ee:32bb33b1:ae294b6e > Creation Time : Fri Aug 14 12:11:48 2015 > Raid Level : raid10 > Used Dev Size : 1945124864 (1855.02 GiB 1991.81 GB) > Array Size : 5835374592 (5565.05 GiB 5975.42 GB) > Raid Devices : 6 > Total Devices : 6 > Preferred Minor : 1 > > Update Time : Thu Sep 19 21:05:16 2019 > State : clean > Active Devices : 4 > Working Devices : 4 > Failed Devices : 2 > Spare Devices : 0 > Checksum : e52ce91f - correct > Events : 271499 > > Layout : offset=2 > Chunk Size : 256K > > Number Major Minor RaidDevice State > this 3 8 66 3 active sync /dev/sde2 > > 0 0 8 18 0 active sync /dev/sdb2 > 1 1 0 0 1 faulty removed > 2 2 0 0 2 faulty removed > 3 3 8 66 3 active sync /dev/sde2 > 4 4 8 82 4 active sync /dev/sdf2 > 5 5 8 2 5 active sync /dev/sda2 > /dev/sdf2: > Magic : a92b4efc > Version : 0.90.00 > UUID : df4ee56a:547f33ee:32bb33b1:ae294b6e > Creation Time : Fri Aug 14 12:11:48 2015 > Raid Level : raid10 > Used Dev Size : 1945124864 (1855.02 GiB 1991.81 GB) > Array Size : 5835374592 (5565.05 GiB 5975.42 GB) > Raid Devices : 6 > Total Devices : 6 > Preferred Minor : 1 > > Update Time : Thu Sep 19 21:05:16 2019 > State : clean > Active Devices : 4 > Working Devices : 4 > Failed Devices : 2 > Spare Devices : 0 > Checksum : e52ce931 - correct > Events : 271499 > > Layout : offset=2 > Chunk Size : 256K > > Number Major Minor RaidDevice State > this 4 8 82 4 active sync /dev/sdf2 > > 0 0 8 18 0 active sync /dev/sdb2 > 1 1 0 0 1 faulty removed > 2 2 0 0 2 faulty removed > 3 3 8 66 3 active sync /dev/sde2 > 4 4 8 82 4 active sync /dev/sdf2 > 5 5 8 2 5 active sync /dev/sda2 >
