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Here is some resuts

acer1969@Diskstation:/$ sudo cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [raidF1]
md2 : active raid5 sdb5[9] sdd5[6] sda5[8] sdc5[7]
      7794733824 blocks super 1.2 level 5, 64k chunk, algorithm 2 [5/4] [_UUUU]

md4 : active raid5 sdc7[5] sdd7[4] sdb7[7] sda7[2]
      15627995648 blocks super 1.2 level 5, 64k chunk, algorithm 2 [5/4] [_UUUU]

md3 : active raid5 sdc6[6] sdd6[5] sda6[7] sdb6[8]
      7813979648 blocks super 1.2 level 5, 64k chunk, algorithm 2 [5/4] [_UUUU]

md5 : active raid5 sdd8[0] sdb8[2] sdc8[1]
      15623676288 blocks super 1.2 level 5, 64k chunk, algorithm 2 [3/3] [UUU]

md1 : active raid1 sda2[0] sdb2[1] sdc2[2] sdd2[3] sde2[4]
      2097088 blocks [12/5] [UUUUU___]

md0 : active raid1 sda1[3] sdb1[0] sdc1[2] sdd1[4] sde1[1]
      2490176 blocks [12/5] [UUUUU___]

unused devices: <none>
acer1969@Diskstation:/$ sudo vgdisplay -v
    Using volume group(s) on command line.
    Wiping cache of LVM-capable devices
  Couldn't find device with uuid C6GTjV-xqi0-e1XG-045q-hCjs-1dCS-fsbzhK.
    There are 1 physical volumes missing.
    There are 1 physical volumes missing.
  --- Volume group ---
  VG Name               vg1
  System ID
  Format                lvm2
  Metadata Areas        3
  Metadata Sequence No  50
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               0
  Max PV                0
  Cur PV                4
  Act PV                3
  VG Size               43.64 TiB
  PE Size               4.00 MiB
  Total PE              11440521
  Alloc PE / Size       11440387 / 43.64 TiB
  Free  PE / Size       134 / 536.00 MiB
  VG UUID               wOZ6OP-qLt2-yTwH-Y3gz-AfcR-p9sX-pen3K6

  --- Logical volume ---
  LV Path                /dev/vg1/syno_vg_reserved_area
  LV Name                syno_vg_reserved_area
  VG Name                vg1
  LV UUID                jIa3dt-tnsG-MyIq-orcB-J7Jh-QHIk-99RL3w
  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     1024
  Block device           253:0

  --- Logical volume ---
  LV Path                /dev/vg1/volume_1
  LV Name                volume_1
  VG Name                vg1
  LV UUID                c1Rzz4-nnSz-zX3u-QqUh-G92x-fmeH-4M7iv8
  LV Write Access        read/write
  LV Creation host, time ,
  LV Status              NOT available
  LV Size                43.64 TiB
  Current LE             11440384
  Segments               6
  Allocation             inherit
  Read ahead sectors     auto

  --- Physical volumes ---
  PV Name               /dev/md2
  PV UUID               ZaSz0T-NRjE-vZEz-V2zZ-7yay-CIa0-67w0bn
  PV Status             allocatable
  Total PE / Free PE    1903011 / 0

  PV Name               /dev/md3
  PV UUID               v7OFq5-a3D0-8yj6-68lz-rn0e-eoDy-WblldV
  PV Status             allocatable
  Total PE / Free PE    1907709 / 0

  PV Name               unknown device
  PV UUID               C6GTjV-xqi0-e1XG-045q-hCjs-1dCS-fsbzhK
  PV Status             allocatable
  Total PE / Free PE    3815428 / 0

  PV Name               /dev/md5
  PV UUID               Gh6XAr-s3Iw-YB0c-4F9H-LGi3-Q3lV-0eLMXc
  PV Status             allocatable
  Total PE / Free PE    3814373 / 134

 

acer1969@Diskstation:/$ sudo lvm pvscan
  Couldn't find device with uuid C6GTjV-xqi0-e1XG-045q-hCjs-1dCS-fsbzhK.
  PV /dev/md2         VG vg1   lvm2 [7.26 TiB / 0    free]
  PV /dev/md3         VG vg1   lvm2 [7.28 TiB / 0    free]
  PV unknown device   VG vg1   lvm2 [14.55 TiB / 0    free]
  PV /dev/md5         VG vg1   lvm2 [14.55 TiB / 536.00 MiB free]
  Total: 4 [43.64 TiB] / in use: 4 [43.64 TiB] / in no VG: 0 [0   ]
acer1969@Diskstation:/$ sudo cat /etc/fstab
none /proc proc defaults 0 0
/dev/root / ext4 defaults 1 1

 

acer1969@Diskstation:/$ sudo smartctl -d sat --all /dev/sda | fgrep -i sector
Sector Sizes:     512 bytes logical, 4096 bytes physical
  5 Reallocated_Sector_Ct                                            0x0033   100   100   010    Pre-fail  Always       -       0
197 Current_Pending_Sector                                           0x0012   100   100   000    Old_age   Always       -       0

 

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Posted (edited)
2 hours ago, pehun said:
md2 : active raid5 sdb5[9] sdd5[6] sda5[8] sdc5[7]
      7794733824 blocks super 1.2 level 5, 64k chunk, algorithm 2 [5/4] [_UUUU]

md4 : active raid5 sdc7[5] sdd7[4] sdb7[7] sda7[2]
      15627995648 blocks super 1.2 level 5, 64k chunk, algorithm 2 [5/4] [_UUUU]

md3 : active raid5 sdc6[6] sdd6[5] sda6[7] sdb6[8]
      7813979648 blocks super 1.2 level 5, 64k chunk, algorithm 2 [5/4] [_UUUU]

md5 : active raid5 sdd8[0] sdb8[2] sdc8[1]
      15623676288 blocks super 1.2 level 5, 64k chunk, algorithm 2 [3/3] [UUU]

SHR(1) is a sum of raid1 und raid5 in a logical volume (lvm2)

sure there is one disk missing but thats what the one redundecy is for, the (mdadm) raid looks ok and working

 

2 hours ago, pehun said:
  --- Physical volumes ---
 ...
  PV Name               unknown device
  PV UUID               C6GTjV-xqi0-e1XG-045q-hCjs-1dCS-fsbzhK
  PV Status             allocatable
  Total PE / Free PE    3815428 / 0
...

 

acer1969@Diskstation:/$ sudo lvm pvscan
  Couldn't find device with uuid C6GTjV-xqi0-e1XG-045q-hCjs-1dCS-fsbzhK.
  PV /dev/md2         VG vg1   lvm2 [7.26 TiB / 0    free]
  PV /dev/md3         VG vg1   lvm2 [7.28 TiB / 0    free]
  PV unknown device   VG vg1   lvm2 [14.55 TiB / 0    free]
  PV /dev/md5         VG vg1   lvm2 [14.55 TiB / 536.00 MiB free]
  Total: 4 [43.64 TiB] / in use: 4 [43.64 TiB] / in no VG: 0 [0   ]
...

 

 

2 hours ago, pehun said:
  VG Name               vg1
  System ID
  Format                lvm2
...  
  Cur PV                4
  Act PV                3
...

 

 

one physical volume is missing and its /dev/md4, but its not the mdadm raid, as its still working

i guess you would need to inspect /dev/md4 further in relation to lvm2,

2 hours ago, pehun said:
  Couldn't find device with uuid C6GTjV-xqi0-e1XG-045q-hCjs-1dCS-fsbzhK.

 

it looks like the UUID of /dev/md4 is missing or different now

 

don't try to repair anything before you are 100% sure whats going on

 

Edited by IG-88
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Posted (edited)

Thanks a lot for your answers.

Initialy the volume disapeared and it said that disk 5 is in status ''initialized''.

I changed it by an other and it didn't changed anything so i putted it back in place.

I'm trying to do smart test on every disks but it takes days....

Edited by pehun
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On 6/12/2022 at 2:42 AM, IG-88 said:

one physical volume is missing and its /dev/md4, but its not the mdadm raid, as its still working

i guess you would need to inspect /dev/md4 further in relation to lvm2,

it looks like the UUID of /dev/md4 is missing or different now

 

Yes, this is a problem.  Post /etc/lvm/backup/vg1

 

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Posted (edited)

here it is

acer1969@Diskstation:/etc/lvm/backup$ cat /etc/lvm/backup/vg1
# Generated by LVM2 version 2.02.132(2)-git (2015-09-22): Mon Mar 21 07:20:17 2022

contents = "Text Format Volume Group"
version = 1

description = "Created after executing '/sbin/lvextend --alloc inherit /dev/vg1/volume_1 --size 45761536M'"

creation_host = "Diskstation"   # Linux Diskstation 3.10.105 #25426 SMP Tue Nov 24 17:17:22 CST 2020 x86_64
creation_time = 1647843617      # Mon Mar 21 07:20:17 2022

vg1 {
        id = "wOZ6OP-qLt2-yTwH-Y3gz-AfcR-p9sX-pen3K6"
        seqno = 50
        format = "lvm2"                 # informational
        status = ["RESIZEABLE", "READ", "WRITE"]
        flags = []
        extent_size = 8192              # 4 Megabytes
        max_lv = 0
        max_pv = 0
        metadata_copies = 0

        physical_volumes {

                pv0 {
                        id = "ZaSz0T-NRjE-vZEz-V2zZ-7yay-CIa0-67w0bn"
                        device = "/dev/md2"     # Hint only

                        status = ["ALLOCATABLE"]
                        flags = []
                        dev_size = 15589466496  # 7.25941 Terabytes
                        pe_start = 1152
                        pe_count = 1903011      # 7.25941 Terabytes
                }

                pv1 {
                        id = "v7OFq5-a3D0-8yj6-68lz-rn0e-eoDy-WblldV"
                        device = "/dev/md3"     # Hint only

                        status = ["ALLOCATABLE"]
                        flags = []
                        dev_size = 15627958144  # 7.27734 Terabytes
                        pe_start = 1152
                        pe_count = 1907709      # 7.27733 Terabytes
                }

                pv2 {
                        id = "C6GTjV-xqi0-e1XG-045q-hCjs-1dCS-fsbzhK"
                        device = "/dev/md4"     # Hint only

                        status = ["ALLOCATABLE"]
                        flags = []
                        dev_size = 31255990144  # 14.5547 Terabytes
                        pe_start = 1152
                        pe_count = 3815428      # 14.5547 Terabytes
                }

                pv3 {
                        id = "Gh6XAr-s3Iw-YB0c-4F9H-LGi3-Q3lV-0eLMXc"
                        device = "/dev/md5"     # Hint only

                        status = ["ALLOCATABLE"]
                        flags = []
                        dev_size = 31247351424  # 14.5507 Terabytes
                        pe_start = 1152
                        pe_count = 3814373      # 14.5507 Terabytes
                }
        }

        logical_volumes {

                syno_vg_reserved_area {
                        id = "jIa3dt-tnsG-MyIq-orcB-J7Jh-QHIk-99RL3w"
                        status = ["READ", "WRITE", "VISIBLE"]
                        flags = []
                        segment_count = 1

                        segment1 {
                                start_extent = 0
                                extent_count = 3        # 12 Megabytes

                                type = "striped"
                                stripe_count = 1        # linear

                                stripes = [
                                        "pv0", 0
                                ]
                        }
                }

                volume_1 {
                        id = "c1Rzz4-nnSz-zX3u-QqUh-G92x-fmeH-4M7iv8"
                        status = ["READ", "WRITE", "VISIBLE"]
                        flags = []
                        segment_count = 6

                        segment1 {
                                start_extent = 0
                                extent_count = 951502   # 3.62969 Terabytes

                                type = "striped"
                                stripe_count = 1        # linear

                                stripes = [
                                        "pv0", 3
                                ]
                        }
                        segment2 {
                                start_extent = 951502
                                extent_count = 1430782  # 5.458 Terabytes

                                type = "striped"
                                stripe_count = 1        # linear

                                stripes = [
                                        "pv1", 0
                                ]
                        }
                        segment3 {
                                start_extent = 2382284
                                extent_count = 951506   # 3.62971 Terabytes

                                type = "striped"
                                stripe_count = 1        # linear

                                stripes = [
                                        "pv0", 951505
                                ]
                        }
                        segment4 {
                                start_extent = 3333790
                                extent_count = 476927   # 1.81933 Terabytes

                                type = "striped"
                                stripe_count = 1        # linear

                                stripes = [
                                        "pv1", 1430782
                                ]
                        }
                        segment5 {
                                start_extent = 3810717
                                extent_count = 3815428  # 14.5547 Terabytes

                                type = "striped"
                                stripe_count = 1        # linear

                                stripes = [
                                        "pv2", 0
                                ]
                        }
                        segment6 {
                                start_extent = 7626145
                                extent_count = 3814239  # 14.5502 Terabytes

                                type = "striped"
                                stripe_count = 1        # linear

                                stripes = [
                                        "pv3", 0
                                ]
                        }
                }
        }
}
acer1969@Diskstation:/etc/lvm/backup$

 

Edited by pehun
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Hello, 

Thanks again for your answers.

I've read the post.

As I understand, I need some disks to backup the datas.

The time i'll receive it, you'll may be back... if it don't bother you, i'll be better if you help me command by command....

I have backups of the most important datas, but the better would be not to loose any data...

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Ok, if you still are waiting on this, the status identified by @IG-88 is that the /dev/md4 array is missing its LVM UUID.

 

This can be re-created without damaging data, although we don't know if the data is intact.

 

If you want to try this, the command will be:

pvcreate --uuid C6GTjV-xqi0-e1XG-045q-hCjs-1dCS-fsbzhK --restorefile /etc/lvm/backup/vg1 /dev/md4

 

Then verify what has happened with a pvs and post the results

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acer1969@Diskstation:/$ sudo pvcreate --uuid C6GTjV-xqi0-e1XG-045q-hCjs-1dCS-fsbzhK --restorefile /etc/lvm/backup/vg1 /dev/md4
Password:
  Couldn't find device with uuid C6GTjV-xqi0-e1XG-045q-hCjs-1dCS-fsbzhK.
  Physical volume "/dev/md4" successfully created

 

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acer1969@Diskstation:/$ sudo pvs
  WARNING: Volume Group vg1 is not consistent.
  WARNING: Inconsistent metadata found for VG vg1 - updating to use version 50
  PV         VG   Fmt  Attr PSize  PFree
  /dev/md2   vg1  lvm2 a--   7.26t      0
  /dev/md3   vg1  lvm2 a--   7.28t      0
  /dev/md4   vg1  lvm2 a--  14.55t      0
  /dev/md5   vg1  lvm2 a--  14.55t 536.00m

 

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acer1969@Diskstation:/volume2$ sudo pvs
  PV         VG   Fmt  Attr PSize  PFree
  /dev/md2   vg1  lvm2 a--   7.26t      0
  /dev/md3   vg1  lvm2 a--   7.28t      0
  /dev/md4   vg1  lvm2 a--  14.55t      0
  /dev/md5   vg1  lvm2 a--  14.55t 536.00m

 

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acer1969@Diskstation:/volume2$ sudo pvs
Password:
  PV         VG   Fmt  Attr PSize  PFree
  /dev/md2   vg1  lvm2 a--   7.26t      0
  /dev/md3   vg1  lvm2 a--   7.28t      0
  /dev/md4   vg1  lvm2 a--  14.55t      0
  /dev/md5   vg1  lvm2 a--  14.55t 536.00m

 

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acer1969@Diskstation:/volume2$ sudo pvdisplay
  --- Physical volume ---
  PV Name               /dev/md2
  VG Name               vg1
  PV Size               7.26 TiB / not usable 384.00 KiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              1903011
  Free PE               0
  Allocated PE          1903011
  PV UUID               ZaSz0T-NRjE-vZEz-V2zZ-7yay-CIa0-67w0bn

  --- Physical volume ---
  PV Name               /dev/md3
  VG Name               vg1
  PV Size               7.28 TiB / not usable 2.94 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              1907709
  Free PE               0
  Allocated PE          1907709
  PV UUID               v7OFq5-a3D0-8yj6-68lz-rn0e-eoDy-WblldV

  --- Physical volume ---
  PV Name               /dev/md4
  VG Name               vg1
  PV Size               14.55 TiB / not usable 1.94 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              3815428
  Free PE               0
  Allocated PE          3815428
  PV UUID               C6GTjV-xqi0-e1XG-045q-hCjs-1dCS-fsbzhK

  --- Physical volume ---
  PV Name               /dev/md5
  VG Name               vg1
  PV Size               14.55 TiB / not usable 3.81 MiB
  Allocatable           yes
  PE Size               4.00 MiB
  Total PE              3814373
  Free PE               134
  Allocated PE          3814239
  PV UUID               Gh6XAr-s3Iw-YB0c-4F9H-LGi3-Q3lV-0eLMXc

 

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acer1969@Diskstation:/volume2$ sudo lvdisplay
  --- Logical volume ---
  LV Path                /dev/vg1/syno_vg_reserved_area
  LV Name                syno_vg_reserved_area
  VG Name                vg1
  LV UUID                jIa3dt-tnsG-MyIq-orcB-J7Jh-QHIk-99RL3w
  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     1024
  Block device           253:0

  --- Logical volume ---
  LV Path                /dev/vg1/volume_1
  LV Name                volume_1
  VG Name                vg1
  LV UUID                c1Rzz4-nnSz-zX3u-QqUh-G92x-fmeH-4M7iv8
  LV Write Access        read/write
  LV Creation host, time ,
  LV Status              available
  # open                 0
  LV Size                43.64 TiB
  Current LE             11440384
  Segments               6
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     1024
  Block device           253:1

 

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