mdadm raid issues
by TheRisen from LinuxQuestions.org on (#5J5EV)
Hi,
I'm new to Linux and I was playing around with mdadm.
I set up a 4 disk raid 5 array and everything was running fine until recently when a power failure caused two of the drives to be dropped from the array.
I reconnected the drives and the raid needed to be set to write and resync'd.
After the raid finished re-syncing it doesn't show any data, however GParted is showing the raid as being 4.5TB of 5.4TB used, meaning there is data still on the disks?
Am I able to recover this data? Stupidly I had some semi important files on the raid that I would rather not lose.
sudo mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Mon Mar 22 09:42:41 2021
Raid Level : raid5
Array Size : 5860147200 (5588.67 GiB 6000.79 GB)
Used Dev Size : 1953382400 (1862.89 GiB 2000.26 GB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Sun May 23 10:37:42 2021
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 512K
Consistency Policy : bitmap
Name : raspberrypi:0 (local to host raspberrypi)
UUID : 0fd6d766:491513d2:4808483b:ba0060b5
Events : 82447
Number Major Minor RaidDevice State
0 8 16 0 active sync /dev/sdb
1 8 32 1 active sync /dev/sdc
5 8 48 2 active sync /dev/sdd
4 8 64 3 active sync /dev/sde
I'm new to Linux and I was playing around with mdadm.
I set up a 4 disk raid 5 array and everything was running fine until recently when a power failure caused two of the drives to be dropped from the array.
I reconnected the drives and the raid needed to be set to write and resync'd.
After the raid finished re-syncing it doesn't show any data, however GParted is showing the raid as being 4.5TB of 5.4TB used, meaning there is data still on the disks?
Am I able to recover this data? Stupidly I had some semi important files on the raid that I would rather not lose.
sudo mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Mon Mar 22 09:42:41 2021
Raid Level : raid5
Array Size : 5860147200 (5588.67 GiB 6000.79 GB)
Used Dev Size : 1953382400 (1862.89 GiB 2000.26 GB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Sun May 23 10:37:42 2021
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 512K
Consistency Policy : bitmap
Name : raspberrypi:0 (local to host raspberrypi)
UUID : 0fd6d766:491513d2:4808483b:ba0060b5
Events : 82447
Number Major Minor RaidDevice State
0 8 16 0 active sync /dev/sdb
1 8 32 1 active sync /dev/sdc
5 8 48 2 active sync /dev/sdd
4 8 64 3 active sync /dev/sde