4 disk SHR BM - 1 disk 'System Partition Failed'

[RobsterUK]

Not a specific XPENO issue, but having issues with the SHR, any advice offered would be appreciated.

 

Running Bare Metal with 4 x 2TB disks in SHR.

Have had issues leading up to 1 disk reporting that the 'System Partition Failed'.

 

Resolved the other issues but not sure how to fix this.

After reading https://forum.synology.com/enu/viewtopic.php?t=95925 & http://www.patnotebook.com/synology-ds1511-hard-disk-crash-not/ I wonder if running a GUI 'repair' will fix the issue.

I've connect via putty and found out the following

nas> cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
md2 : active raid5 sdd5[4] sdf5[6] sde5[5] sdc5[1]
     5846049792 blocks super 1.2 level 5, 64k chunk, algorithm 2 [4/4] [uUUU]

md1 : active raid1 sdc2[0] sdd2[1] sde2[2] sdf2[3]
     2097088 blocks [12/4] [uUUU________]

md0 : active raid1 sdc1[0] sdd1[1] sdf1[2]
     2490176 blocks [12/3] [uUU_________]

unused devices: 

 

Then looked at md0

 

nas> mdadm --detail /dev/md0
/dev/md0:
       Version : 0.90
 Creation Time : Sat Jan  1 00:00:03 2000
    Raid Level : raid1
    Array Size : 2490176 (2.37 GiB 2.55 GB)
 Used Dev Size : 2490176 (2.37 GiB 2.55 GB)
  Raid Devices : 12
 Total Devices : 3
Preferred Minor : 0
   Persistence : Superblock is persistent

   Update Time : Thu Aug 11 12:14:31 2016
         State : clean, degraded
Active Devices : 3
Working Devices : 3
Failed Devices : 0
 Spare Devices : 0

          UUID : d58cf8b8:20aa78f7:3017a5a8:c86610be
        Events : 0.1107818

   Number   Major   Minor   RaidDevice State
      0       8       33        0      active sync   /dev/sdc1
      1       8       49        1      active sync   /dev/sdd1
      2       8       81        2      active sync   /dev/sdf1
      3       0        0        3      removed
      4       0        0        4      removed
      5       0        0        5      removed
      6       0        0        6      removed
      7       0        0        7      removed
      8       0        0        8      removed
      9       0        0        9      removed
     10       0        0       10      removed
     11       0        0       11      removed

 

* on a side note, I don't know why the disks start at sdc - sdf (not at sda - sdd) but the GUI also indicates they do not start at the logical beginning.

 

Anyway, the System partition, md0, clearly has sde, missing.

Would it be worth running the 'Repair' from the GUI.

Or is there a command line alternative that would resolve the issue better?

Or, should I scrub the drive then reinsert to allow SHR to rebuild the drive from being empty?

[shrabok]

I would recommend using the tools provided within diskstation first.

It looks to be degraded and if you can perform a rebuild without any manual intervention that would be the best approach.

[RobsterUK]

Yea OK, think I'll give it a try. After reading the threads on those links I want to err on the side of caution. Asking in here is a good way to get somebody else's opinion.