Hard disc not detect and pool degrade after restarted

[Brian Koh]

Hi Marius, 

 

I own a Synology 920+ and am currently using DSM version 7.2.1-69057 Update 5. The NAS has been running continuously, but after shutting it down for maintenance yesterday, I noticed upon restarting it today that the HDD has degraded and disconnected.

 

This is second times, i experience this issues. This issues happen since past 2 year and HDD is a new HDD. 

I suspect may not be a HDD issues, maybe is OS affecting it. 

 

Thank You

 

ash-4.4# cat /proc/mdstat
Personalities : [raid1]
md2 : active raid1 sata1p5[1]
      5855691456 blocks super 1.2 [2/1] [_U]

md1 : active raid1 sata1p2[1]
      2097088 blocks [4/1] [_U__]

md0 : active raid1 sata1p1[1]
      2490176 blocks [4/1] [_U__]

unused devices: <none>

 

ash-4.4# vgdisplay -v
    Using volume group(s) on command line.
  --- Volume group ---
  VG Name               vg1
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  8
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               1
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               5.45 TiB
  PE Size               4.00 MiB
  Total PE              1429612
  Alloc PE / Size       1427971 / 5.45 TiB
  Free  PE / Size       1641 / 6.41 GiB
  VG UUID               blwEd7-I01i-6gIO-i41d-Y4U4-cPOI-ctVwtA

  --- Logical volume ---
  LV Path                /dev/vg1/syno_vg_reserved_area
  LV Name                syno_vg_reserved_area
  VG Name                vg1
  LV UUID                N2aCBI-8Cos-RX8d-Bp2K-FbDI-GixS-mxQgvA
  LV Write Access        read/write
  LV Creation host, time ,
  LV Status              available
  # open                 0
  LV Size                12.00 MiB
  Current LE             3
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     384
  Block device           248:0

  --- Logical volume ---
  LV Path                /dev/vg1/volume_1
  LV Name                volume_1
  VG Name                vg1
  LV UUID                O8iKF2-Sdsc-pceS-Gvyh-B3Gs-VflC-ABlEOA
  LV Write Access        read/write
  LV Creation host, time ,
  LV Status              available
  # open                 1
  LV Size                5.45 TiB
  Current LE             1427968
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     384
  Block device           248:1

  --- Physical volumes ---
  PV Name               /dev/md2
  PV UUID               kqtebU-C0N9-YXHb-4lam-exZA-CD4l-DLdIBA
  PV Status             allocatable
  Total PE / Free PE    1429612 / 1641

 

ash-4.4# lvdisplay -v
    Using logical volume(s) on command line.
  --- Logical volume ---
  LV Path                /dev/vg1/syno_vg_reserved_area
  LV Name                syno_vg_reserved_area
  VG Name                vg1
  LV UUID                N2aCBI-8Cos-RX8d-Bp2K-FbDI-GixS-mxQgvA
  LV Write Access        read/write
  LV Creation host, time ,
  LV Status              available
  # open                 0
  LV Size                12.00 MiB
  Current LE             3
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     384
  Block device           248:0

  --- Logical volume ---
  LV Path                /dev/vg1/volume_1
  LV Name                volume_1
  VG Name                vg1
  LV UUID                O8iKF2-Sdsc-pceS-Gvyh-B3Gs-VflC-ABlEOA
  LV Write Access        read/write
  LV Creation host, time ,
  LV Status              available
  # open                 1
  LV Size                5.45 TiB
  Current LE             1427968
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     384
  Block device           248:1

 

ash-4.4# lvm pvscan
  PV /dev/md2   VG vg1   lvm2 [5.45 TiB / 6.41 GiB free]
  Total: 1 [5.45 TiB] / in use: 1 [5.45 TiB] / in no VG: 0 [0   ]

 

ash-4.4# cat /etc/fstab
none /proc proc defaults 0 0
/dev/root / ext4 defaults 1 1
/dev/mapper/cachedev_0 /volume1 btrfs auto_reclaim_space,ssd,synoacl,relatime,relatime_period=30,nodev 0 0