我之前有个黑群，因为硬件故障导致无法开机。配置为 4 块 4T 硬盘组装 RAID6 。
使用新机器插入硬盘，结果无法进入系统，无奈只能用一块新硬盘装系统，另外插入两块硬盘（新机器期中一个 SATA 口有问题，只能连接三块硬盘。）。
然后使用降级模式（ RAID6 下两块硬盘）拷贝了所有文件。
但是发现拷贝出来的文件有元错误（某些 RAR 压缩包报错。）
为了解决这个问题，我新买了 DS1522 ，并将四块硬盘都插入机器。结果只能识别到两块盘的 RAID6 。另外两块盘无法加入 RAID 。为此我发起了群晖的工单。但是群晖技术人员一通操作，还是无法重新构建 RAID6
其操作记录如下：
login as: test1
[email protected]'s password:
Access denied
[email protected]'s password:
Using terminal commands to modify system configs, execute external binary
files, add files, or install unauthorized third-party apps may lead to system
damages or unexpected behavior, or cause data loss. Make sure you are aware of
the consequences of each command and proceed at your own risk.
Warning: Data should only be stored in shared folders. Data stored elsewhere
may be deleted when the system is updated/restarted.
Could not chdir to home directory /var/services/homes/test1: No such file or dir ectory
test1@DS1522:/$ sudo -i
We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:
#1) Respect the privacy of others.
#2) Think before you type.
#3) With great power comes great responsibility.
Password:
root@DS1522:~# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/md0 7.9G 1.4G 6.4G 17% /
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 240K 3.9G 1% /dev/shm
tmpfs 3.9G 17M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
tmpfs 3.9G 712K 3.9G 1% /tmp
/dev/mapper/cachedev_1 437G 81M 437G 1% /volume1
/dev/mapper/cachedev_0 7.0T 6.1T 907G 88% /volume2
root@DS1522:~# touch /tmp/volume_skip_check
root@DS1522:~# ll /usr/syno/etc | grep preference
lrwxrwxrwx 1 root root 24 May 28 10:53 preference -> /volume1/@userpreference
root@DS1522:~# synosetkeyvalue /etc/synoinfo.conf disable_volumes volume2
root@DS1522:~#
login as: test1
[email protected]'s password:
Using terminal commands to modify system configs, execute external binary
files, add files, or install unauthorized third-party apps may lead to system
damages or unexpected behavior, or cause data loss. Make sure you are aware of
the consequences of each command and proceed at your own risk.
Warning: Data should only be stored in shared folders. Data stored elsewhere
may be deleted when the system is updated/restarted.
Could not chdir to home directory /var/services/homes/test1: No such file or directory
test1@DS1522:/$ sudo -i
Password:
root@DS1522:~# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/md0 7.9G 1.4G 6.4G 18% /
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 240K 3.9G 1% /dev/shm
tmpfs 3.9G 16M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
tmpfs 3.9G 692K 3.9G 1% /tmp
/dev/mapper/cachedev_1 437G 80M 437G 1% /volume1
root@DS1522:~# sfdisk -l
/dev/md0p1 0 16777087 16777088 0
/dev/md1p1 0 4194175 4194176 0
Error: /dev/md2: unrecognised disk label
get disk fail
Error: /dev/md3: unrecognised disk label
get disk fail
/dev/sata1p1 2048 4982527 4980480 fd
/dev/sata1p2 4982528 9176831 4194304 fd
/dev/sata1p3 9437184 7814032064 7804594881 fd
/dev/sata2p1 2048 4982527 4980480 fd
/dev/sata2p2 4982528 9176831 4194304 fd
/dev/sata2p3 9437184 7814032064 7804594881 fd
/dev/sata3p1 8192 16785407 16777216 fd
/dev/sata3p2 16785408 20979711 4194304 fd
/dev/sata3p3 21241856 976568351 955326496 fd
/dev/sata4p1 2048 4982527 4980480 fd
/dev/sata4p2 4982528 9176831 4194304 fd
/dev/sata4p3 9437184 7814032064 7804594881 fd
/dev/sata5p1 2048 4982527 4980480 fd
/dev/sata5p2 4982528 9176831 4194304 fd
/dev/sata5p3 9437184 7814032064 7804594881 fd
/dev/zram0p1 0 4863999 4864000 0
/dev/zram1p1 0 4863999 4864000 0
/dev/synobootp1 2048 67583 65536 ef
/dev/synobootp2 67584 239615 172032 83
root@DS1522:~# cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4] [raidF1] [linear]
md2 : active linear sata3p3[0]
477662208 blocks super 1.2 64k rounding [1/1] [U]
md3 : active raid6 sata2p3[6] sata1p3[7]
7804592768 blocks super 1.2 level 6, 64k chunk, algorithm 2 [4/2] [__UU]
md1 : active raid1 sata3p2[0]
2097088 blocks [5/1] [U____]
md0 : active raid1 sata3p1[0]
8388544 blocks [5/1] [U____]
unused devices: <none>
root@DS1522:~# mdadm -S /dev/md3
mdadm: Cannot get exclusive access to /dev/md3:Perhaps a running process, mounted filesystem or active volume group?
root@DS1522:~# pvs
PV VG Fmt Attr PSize PFree
/dev/md2 vg1 lvm2 a-- 455.53g 532.00m
/dev/md3 vg2 lvm2 a-- 7.27t 28.00m
root@DS1522:~# vgs
VG #PV #LV #SN Attr VSize VFree
vg1 1 2 0 wz--n- 455.53g 532.00m
vg2 1 2 0 wz--n- 7.27t 28.00m
root@DS1522:~# lvm pvscan
PV /dev/md3 VG vg2 lvm2 [7.27 TiB / 28.00 MiB free]
PV /dev/md2 VG vg1 lvm2 [455.53 GiB / 532.00 MiB free]
Total: 2 [7.71 TiB] / in use: 2 [7.71 TiB] / in no VG: 0 [0 ]
root@DS1522:~# vgchange -an vg2
Logical volume vg2/volume_2 is used by another device.
Can't deactivate volume group "vg2" with 1 open logical volume(s)
root@DS1522:~# lvdisplay
--- Logical volume ---
LV Path /dev/vg2/syno_vg_reserved_area
LV Name syno_vg_reserved_area
VG Name vg2
LV UUID 2PZQzQ-eUOs-mypA-kdxj-CYu9-NN3O-616plp
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 512
Block device 248:0
--- Logical volume ---
LV Path /dev/vg2/volume_2
LV Name volume_2
VG Name vg2
LV UUID lnH9RB-qmXI-PqoP-WL0e-HjoS-3Llm-SzVvbn
LV Write Access read/write
LV Creation host, time ,
LV Status available
# open 1
LV Size 7.27 TiB
Current LE 1905408
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 512
Block device 248:1
--- Logical volume ---
LV Path /dev/vg1/syno_vg_reserved_area
LV Name syno_vg_reserved_area
VG Name vg1
LV UUID b3UDkk-uf9K-bpkP-Ofm0-vmI0-F2aU-gN05z9
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 248:2
--- Logical volume ---
LV Path /dev/vg1/volume_1
LV Name volume_1
VG Name vg1
LV UUID HPq9Fi-D34E-7Ovp-LCa4-S8Td-Y7lp-zpI2Cc
LV Write Access read/write
LV Creation host, time ,
LV Status available
# open 1
LV Size 455.00 GiB
Current LE 116480
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 384
Block device 248:3
root@DS1522:~# lvchange -an /dev/vg
vg1/ vg2/ vga_arbiter
root@DS1522:~# lvchange -an /dev/vg2/volume_2
-ash: lvchange: command not found
root@DS1522:~# synospace --stop-all-spaces
sucess to unmount all volume, start to disassemble space
success to disassemble all space
root@DS1522:~# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/md0 7.9G 1.4G 6.4G 18% /
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 4.0K 3.9G 1% /dev/shm
tmpfs 3.9G 16M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
tmpfs 3.9G 696K 3.9G 1% /tmp
root@DS1522:~# vgchange -an
root@DS1522:~# mdadm -S /dev/md
md0 md1
root@DS1522:~# mdadm -Af /dev/md
md0 md1
root@DS1522:~# mdadm -Af /dev/md3 /dev/sata[1245]p3
mdadm: /dev/md3 has been started with 2 drives (out of 4).
root@DS1522:~# cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4] [raidF1] [linear]
md3 : active raid6 sata2p3[6] sata1p3[7]
7804592768 blocks super 1.2 level 6, 64k chunk, algorithm 2 [4/2] [__UU]
md1 : active raid1 sata3p2[0]
2097088 blocks [5/1] [U____]
md0 : active raid1 sata3p1[0]
8388544 blocks [5/1] [U____]
unused devices: <none>
root@DS1522:~# mdadm -D /dev/md3
/dev/md3:
Version : 1.2
Creation Time : Sun Apr 7 01:14:53 2019
Raid Level : raid6
Array Size : 7804592768 (7443.04 GiB 7991.90 GB)
Used Dev Size : 3902296384 (3721.52 GiB 3995.95 GB)
Raid Devices : 4
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Thu May 30 11:42:58 2024
State : clean, degraded
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
Name : DS918:2
UUID : 10eec84e:da357c19:2c40875f:92e5302c
Events : 19092
Number Major Minor RaidDevice State
- 0 0 0 removed
- 0 0 1 removed
6 8 19 2 active sync /dev/sata2p3
7 8 3 3 active sync /dev/sata1p3
root@DS1522:~# mdadm -E /dev/sata4p3
/dev/sata4p3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 10eec84e:da357c19:2c40875f:92e5302c
Name : DS918:2
Creation Time : Sun Apr 7 01:14:53 2019
Raid Level : raid6
Raid Devices : 4
Avail Dev Size : 7804592833 (3721.52 GiB 3995.95 GB)
Array Size : 7804592768 (7443.04 GiB 7991.90 GB)
Used Dev Size : 7804592768 (3721.52 GiB 3995.95 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Unused Space : before=1968 sectors, after=65 sectors
State : clean
Device UUID : 4d54a772:f9b0a587:d8093250:abeb8e36
Update Time : Thu Feb 23 11:18:37 2023
Checksum : b2665d87 - correct
Events : 13539
Layout : left-symmetric
Chunk Size : 64K
Device Role : Active device 1
Array State : .A.. ('A' == active, '.' == missing, 'R' == replacing)
root@DS1522:~# mdadm -Af /dev/md3 /dev/sata[1245]p3 --run
mdadm: /dev/sata1p3 is busy - skipping
mdadm: /dev/sata2p3 is busy - skipping
mdadm: Found some drive for an array that is already active: /dev/md3
mdadm: giving up.
root@DS1522:~# mdadm -S /dev/md3
mdadm: stopped /dev/md3
root@DS1522:~# mdadm -Af /dev/md3 /dev/sata[1245]p3 --run
mdadm: /dev/md3 has been started with 2 drives (out of 4).
root@DS1522:~#
想问下大家，这种情况下，这个 RAID6 还有救吗？
使用新机器插入硬盘，结果无法进入系统，无奈只能用一块新硬盘装系统，另外插入两块硬盘（新机器期中一个 SATA 口有问题，只能连接三块硬盘。）。
然后使用降级模式（ RAID6 下两块硬盘）拷贝了所有文件。
但是发现拷贝出来的文件有元错误（某些 RAR 压缩包报错。）
为了解决这个问题，我新买了 DS1522 ，并将四块硬盘都插入机器。结果只能识别到两块盘的 RAID6 。另外两块盘无法加入 RAID 。为此我发起了群晖的工单。但是群晖技术人员一通操作，还是无法重新构建 RAID6
其操作记录如下：
login as: test1
[email protected]'s password:
Access denied
[email protected]'s password:
Using terminal commands to modify system configs, execute external binary
files, add files, or install unauthorized third-party apps may lead to system
damages or unexpected behavior, or cause data loss. Make sure you are aware of
the consequences of each command and proceed at your own risk.
Warning: Data should only be stored in shared folders. Data stored elsewhere
may be deleted when the system is updated/restarted.
Could not chdir to home directory /var/services/homes/test1: No such file or dir ectory
test1@DS1522:/$ sudo -i
We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:
#1) Respect the privacy of others.
#2) Think before you type.
#3) With great power comes great responsibility.
Password:
root@DS1522:~# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/md0 7.9G 1.4G 6.4G 17% /
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 240K 3.9G 1% /dev/shm
tmpfs 3.9G 17M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
tmpfs 3.9G 712K 3.9G 1% /tmp
/dev/mapper/cachedev_1 437G 81M 437G 1% /volume1
/dev/mapper/cachedev_0 7.0T 6.1T 907G 88% /volume2
root@DS1522:~# touch /tmp/volume_skip_check
root@DS1522:~# ll /usr/syno/etc | grep preference
lrwxrwxrwx 1 root root 24 May 28 10:53 preference -> /volume1/@userpreference
root@DS1522:~# synosetkeyvalue /etc/synoinfo.conf disable_volumes volume2
root@DS1522:~#
login as: test1
[email protected]'s password:
Using terminal commands to modify system configs, execute external binary
files, add files, or install unauthorized third-party apps may lead to system
damages or unexpected behavior, or cause data loss. Make sure you are aware of
the consequences of each command and proceed at your own risk.
Warning: Data should only be stored in shared folders. Data stored elsewhere
may be deleted when the system is updated/restarted.
Could not chdir to home directory /var/services/homes/test1: No such file or directory
test1@DS1522:/$ sudo -i
Password:
root@DS1522:~# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/md0 7.9G 1.4G 6.4G 18% /
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 240K 3.9G 1% /dev/shm
tmpfs 3.9G 16M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
tmpfs 3.9G 692K 3.9G 1% /tmp
/dev/mapper/cachedev_1 437G 80M 437G 1% /volume1
root@DS1522:~# sfdisk -l
/dev/md0p1 0 16777087 16777088 0
/dev/md1p1 0 4194175 4194176 0
Error: /dev/md2: unrecognised disk label
get disk fail
Error: /dev/md3: unrecognised disk label
get disk fail
/dev/sata1p1 2048 4982527 4980480 fd
/dev/sata1p2 4982528 9176831 4194304 fd
/dev/sata1p3 9437184 7814032064 7804594881 fd
/dev/sata2p1 2048 4982527 4980480 fd
/dev/sata2p2 4982528 9176831 4194304 fd
/dev/sata2p3 9437184 7814032064 7804594881 fd
/dev/sata3p1 8192 16785407 16777216 fd
/dev/sata3p2 16785408 20979711 4194304 fd
/dev/sata3p3 21241856 976568351 955326496 fd
/dev/sata4p1 2048 4982527 4980480 fd
/dev/sata4p2 4982528 9176831 4194304 fd
/dev/sata4p3 9437184 7814032064 7804594881 fd
/dev/sata5p1 2048 4982527 4980480 fd
/dev/sata5p2 4982528 9176831 4194304 fd
/dev/sata5p3 9437184 7814032064 7804594881 fd
/dev/zram0p1 0 4863999 4864000 0
/dev/zram1p1 0 4863999 4864000 0
/dev/synobootp1 2048 67583 65536 ef
/dev/synobootp2 67584 239615 172032 83
root@DS1522:~# cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4] [raidF1] [linear]
md2 : active linear sata3p3[0]
477662208 blocks super 1.2 64k rounding [1/1] [U]
md3 : active raid6 sata2p3[6] sata1p3[7]
7804592768 blocks super 1.2 level 6, 64k chunk, algorithm 2 [4/2] [__UU]
md1 : active raid1 sata3p2[0]
2097088 blocks [5/1] [U____]
md0 : active raid1 sata3p1[0]
8388544 blocks [5/1] [U____]
unused devices: <none>
root@DS1522:~# mdadm -S /dev/md3
mdadm: Cannot get exclusive access to /dev/md3:Perhaps a running process, mounted filesystem or active volume group?
root@DS1522:~# pvs
PV VG Fmt Attr PSize PFree
/dev/md2 vg1 lvm2 a-- 455.53g 532.00m
/dev/md3 vg2 lvm2 a-- 7.27t 28.00m
root@DS1522:~# vgs
VG #PV #LV #SN Attr VSize VFree
vg1 1 2 0 wz--n- 455.53g 532.00m
vg2 1 2 0 wz--n- 7.27t 28.00m
root@DS1522:~# lvm pvscan
PV /dev/md3 VG vg2 lvm2 [7.27 TiB / 28.00 MiB free]
PV /dev/md2 VG vg1 lvm2 [455.53 GiB / 532.00 MiB free]
Total: 2 [7.71 TiB] / in use: 2 [7.71 TiB] / in no VG: 0 [0 ]
root@DS1522:~# vgchange -an vg2
Logical volume vg2/volume_2 is used by another device.
Can't deactivate volume group "vg2" with 1 open logical volume(s)
root@DS1522:~# lvdisplay
--- Logical volume ---
LV Path /dev/vg2/syno_vg_reserved_area
LV Name syno_vg_reserved_area
VG Name vg2
LV UUID 2PZQzQ-eUOs-mypA-kdxj-CYu9-NN3O-616plp
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 512
Block device 248:0
--- Logical volume ---
LV Path /dev/vg2/volume_2
LV Name volume_2
VG Name vg2
LV UUID lnH9RB-qmXI-PqoP-WL0e-HjoS-3Llm-SzVvbn
LV Write Access read/write
LV Creation host, time ,
LV Status available
# open 1
LV Size 7.27 TiB
Current LE 1905408
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 512
Block device 248:1
--- Logical volume ---
LV Path /dev/vg1/syno_vg_reserved_area
LV Name syno_vg_reserved_area
VG Name vg1
LV UUID b3UDkk-uf9K-bpkP-Ofm0-vmI0-F2aU-gN05z9
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 248:2
--- Logical volume ---
LV Path /dev/vg1/volume_1
LV Name volume_1
VG Name vg1
LV UUID HPq9Fi-D34E-7Ovp-LCa4-S8Td-Y7lp-zpI2Cc
LV Write Access read/write
LV Creation host, time ,
LV Status available
# open 1
LV Size 455.00 GiB
Current LE 116480
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 384
Block device 248:3
root@DS1522:~# lvchange -an /dev/vg
vg1/ vg2/ vga_arbiter
root@DS1522:~# lvchange -an /dev/vg2/volume_2
-ash: lvchange: command not found
root@DS1522:~# synospace --stop-all-spaces
sucess to unmount all volume, start to disassemble space
success to disassemble all space
root@DS1522:~# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/md0 7.9G 1.4G 6.4G 18% /
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 4.0K 3.9G 1% /dev/shm
tmpfs 3.9G 16M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
tmpfs 3.9G 696K 3.9G 1% /tmp
root@DS1522:~# vgchange -an
root@DS1522:~# mdadm -S /dev/md
md0 md1
root@DS1522:~# mdadm -Af /dev/md
md0 md1
root@DS1522:~# mdadm -Af /dev/md3 /dev/sata[1245]p3
mdadm: /dev/md3 has been started with 2 drives (out of 4).
root@DS1522:~# cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4] [raidF1] [linear]
md3 : active raid6 sata2p3[6] sata1p3[7]
7804592768 blocks super 1.2 level 6, 64k chunk, algorithm 2 [4/2] [__UU]
md1 : active raid1 sata3p2[0]
2097088 blocks [5/1] [U____]
md0 : active raid1 sata3p1[0]
8388544 blocks [5/1] [U____]
unused devices: <none>
root@DS1522:~# mdadm -D /dev/md3
/dev/md3:
Version : 1.2
Creation Time : Sun Apr 7 01:14:53 2019
Raid Level : raid6
Array Size : 7804592768 (7443.04 GiB 7991.90 GB)
Used Dev Size : 3902296384 (3721.52 GiB 3995.95 GB)
Raid Devices : 4
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Thu May 30 11:42:58 2024
State : clean, degraded
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
Name : DS918:2
UUID : 10eec84e:da357c19:2c40875f:92e5302c
Events : 19092
Number Major Minor RaidDevice State
- 0 0 0 removed
- 0 0 1 removed
6 8 19 2 active sync /dev/sata2p3
7 8 3 3 active sync /dev/sata1p3
root@DS1522:~# mdadm -E /dev/sata4p3
/dev/sata4p3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 10eec84e:da357c19:2c40875f:92e5302c
Name : DS918:2
Creation Time : Sun Apr 7 01:14:53 2019
Raid Level : raid6
Raid Devices : 4
Avail Dev Size : 7804592833 (3721.52 GiB 3995.95 GB)
Array Size : 7804592768 (7443.04 GiB 7991.90 GB)
Used Dev Size : 7804592768 (3721.52 GiB 3995.95 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Unused Space : before=1968 sectors, after=65 sectors
State : clean
Device UUID : 4d54a772:f9b0a587:d8093250:abeb8e36
Update Time : Thu Feb 23 11:18:37 2023
Checksum : b2665d87 - correct
Events : 13539
Layout : left-symmetric
Chunk Size : 64K
Device Role : Active device 1
Array State : .A.. ('A' == active, '.' == missing, 'R' == replacing)
root@DS1522:~# mdadm -Af /dev/md3 /dev/sata[1245]p3 --run
mdadm: /dev/sata1p3 is busy - skipping
mdadm: /dev/sata2p3 is busy - skipping
mdadm: Found some drive for an array that is already active: /dev/md3
mdadm: giving up.
root@DS1522:~# mdadm -S /dev/md3
mdadm: stopped /dev/md3
root@DS1522:~# mdadm -Af /dev/md3 /dev/sata[1245]p3 --run
mdadm: /dev/md3 has been started with 2 drives (out of 4).
root@DS1522:~#
想问下大家，这种情况下，这个 RAID6 还有救吗？
15 条回复 • 2024-06-13 23:56:13 +08:00
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cr3bit 23 天前 via Android
你两块盘强制上线之后另外两块的数据就废了
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leang521 OP 在出问题后所有四块硬盘都没有发生写入操作，所以我希望强制挂载四块硬盘，哪怕只读方式也好。
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sadan9 23 天前
从给的数据来看，volume_2 （ 7T 的卷）由 stat1 ，2 ，4 ，5 盘的第 3 个分区组成。
整个操作过程中尝试直接重新使用 4 块盘重新组建 raid ，但系统只使用了 2 块（ 1 ，2 ）。另外两块盘处于 remove 状态。 看了一下阵列并未启用 Bitmap （群晖默认应该是不启用的），也就是现在即便现在你把盘插回去重建，也只会使用 1 ，2 的数据来全量重建 4 ，5 。这种情况下 4 ，5 得到的数据和你现在直接从 1 ，2 上读取的应该是一样由问题的。 还有一种思路就是把 4 ，5 盘单独尝试挂载一下阵列，看看能不能得到正确的数据。 另外不考虑数据问题的话，可以尝试使用以下指令吧 4 ，5 重新加回阵列。 但再次强调，这么做是以 1 ，2 盘的数据重新计算并覆盖 4 ，5 。 mdadm --re-add /dev/md3 /dev/sata4p3 #检查 raid 状态，等待重建完成 mdadm -D /dev/md3 mdadm --re-add /dev/md3 /dev/sata5p3 #检查 raid 状态，等待重建完成 mdadm -D /dev/md3 |
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sadan9 23 天前
@leang521
理论上只有 1 ，2 在线的情况下，读取出的数据应该也是正确的。但你这样读取出来的错误的数据，我只能猜测是之前数据就已经不正确了。或者在重建过程中群晖做了别的什么操作导致 RAID6 上 4 块盘的状态并不一致。 |
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zhandouji2023 23 天前 via Android
还是自己组 omv 好，系统挂了重新装就行。
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hanyuwei70 22 天前
你这个 md 上面是啥文件系统？
考虑到拷贝出来的 RAR 出错，我怀疑是你硬盘出现了 bitflip 并扩散了。如果是这样哪怕 R6 起来了也是不可用的。 |
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ihipop 18 天前
这样麻烦的情况下，后续我应该选 raid1+0 还是 raid6 啊
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leang521 OP @sadan9 我是用新盘重做了系统，并且没有安装任何套件，然后尝试用 3 盘重建，结果由于机器问题只能访问到两个盘，结果就出现了这个问题。在此过程中我没有写入任何数据，但是群晖在重建 RAID 的过程中有没有写入数据就不清楚了。
@hanyuwei70 我使用的是 Btrfs 文件系统。我就是在担心出现 bit 错误。希望 Raid6 通过数据清洗能修复这种错误。 |
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sadan9 10 天前
@leang521 群晖的 SHR 本质上是 mdadm （就是你前面看到的/dev/mdX ） + lvm （用来组装+划分空间）
现在主要是想办法把/dev/md3 恢复出来。 你手上还有别的 linux 机器不？试试把 sata4 ，sata5 （即现在 raid6 中未使用的 2 块盘）拿到别的机器上： mdadm --assemble --scan 看看能不能扫到阵列。 |
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hanyuwei70 9 天前
@leang521 群晖的 btrfs 是自己维护的，我没法给更多信息了。
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