This is where all of the known disk volumes are tracked.

cat /etc/volume.conf

returns:

[Global]
volBitmap = 0x1fe
pd_00000003_3_Vol_Bitmap = 0x2
pd_00000004_3_Vol_Bitmap = 0x2
pd_00000005_3_Vol_Bitmap = 0x2
pd_00000006_3_Vol_Bitmap = 0x2
pd_00000007_3_Vol_Bitmap = 0x2
pd_00000008_3_Vol_Bitmap = 0x2
pd_00000009_3_Vol_Bitmap = 0x2
pd_0000000a_3_Vol_Bitmap = 0x2
pd_00010065_3_Vol_Bitmap = 0x4
pd_00030065_3_Vol_Bitmap = 0x8
pd_00210003_1_Vol_Bitmap = 4
pd_00210003_2_Vol_Bitmap = 5
pd_00210003_3_Vol_Bitmap = 6
pd_00210003_5_Vol_Bitmap = 7
pd_00210003_6_Vol_Bitmap = 8
 
[VOL_1]
volId = 1
volName = DataVol1
raidId = 1
raidName = /dev/md1
encryption = no
ssdCache = yes
unclean = yes
need_rehash = no
creating = no
mappingName = /dev/mapper/cachedev1
qnapResize = no
delayAlloc = yes
privilege = no
readOnly = no
writeCache = yes
invisible = no
raidLevel = 6
partNo = 3
status = 3
filesystem = 9
internal = 1
time = Wed Sep 15 08:17:53 2021
volType = 1
baseId = 1
baseName = /dev/mapper/cachedev1
inodeRatio = 16384
inodeCount = 2912428032
fsFeature = 0x3
 
[VOL_2]
volId = 2
volName = DataVol2
raidId = 3
raidName = /dev/md3
encryption = no
ssdCache = yes
unclean = yes
need_rehash = no
creating = no
mappingName = /dev/mapper/cachedev2
qnapResize = no
delayAlloc = yes
privilege = no
readOnly = no
writeCache = yes
invisible = no
raidLevel = 1
partNo = 3
status = 3
filesystem = 9
internal = 1
time = Wed Sep 15 08:17:53 2021
volType = 1
baseId = 2
baseName = /dev/mapper/cachedev2
inodeRatio = 32768
inodeCount = 725110784
fsFeature = 0x3
 
[VOL_3]
volId = 3
volName = DataVol3
raidId = 4
raidName = /dev/md4
encryption = no
ssdCache = yes
unclean = yes
need_rehash = no
creating = no
mappingName = /dev/mapper/cachedev3
qnapResize = no
delayAlloc = yes
privilege = no
readOnly = no
writeCache = yes
invisible = no
raidLevel = 1
partNo = 3
status = 3
filesystem = 9
internal = 1
time = Wed Sep 15 08:17:53 2021
volType = 1
baseId = 3
baseName = /dev/mapper/cachedev3
inodeRatio = 32768
inodeCount = 725110784
fsFeature = 0x3
 
[VOL_4]
volId = 4
volName = 
raidId = -1
raidName = /dev/sdj1
encryption = no
mappingName = /dev/sdj1
qnapResize = no
delayAlloc = yes
privilege = no
readOnly = no
writeCache = yes
invisible = no
raidLevel = -2
partNo = 1
isGlobalSpare = no
diskId = 0x00210003
status = -1
filesystem = 7
internal = 0
time = Wed Sep 15 08:19:41 2021
unclean = no
need_rehash = no
creating = no
 
[VOL_5]
volId = 5
volName = 
raidId = -1
raidName = /dev/sdj2
encryption = no
mappingName = /dev/sdj2
qnapResize = no
delayAlloc = yes
privilege = no
readOnly = no
writeCache = yes
invisible = no
raidLevel = -2
partNo = 2
isGlobalSpare = no
diskId = 0x00210003
status = -1
filesystem = 7
internal = 0
time = Wed Sep 15 08:19:41 2021
unclean = no
need_rehash = no
creating = no
 
[VOL_6]
volId = 6
volName = 
raidId = -1
raidName = /dev/sdj3
encryption = no
mappingName = /dev/sdj3
qnapResize = no
delayAlloc = yes
privilege = no
readOnly = no
writeCache = yes
invisible = no
raidLevel = -2
partNo = 3
isGlobalSpare = no
diskId = 0x00210003
status = -1
filesystem = 7
internal = 0
time = Wed Sep 15 08:19:42 2021
unclean = no
need_rehash = no
creating = no
 
[VOL_7]
volId = 7
volName = 
raidId = -1
raidName = /dev/sdj5
encryption = no
mappingName = /dev/sdj5
qnapResize = no
delayAlloc = yes
privilege = no
readOnly = no
writeCache = yes
invisible = no
raidLevel = -2
partNo = 5
isGlobalSpare = no
diskId = 0x00210003
status = -1
filesystem = 7
internal = 0
time = Wed Sep 15 08:19:42 2021
unclean = no
need_rehash = no
creating = no
 
[VOL_8]
volId = 8
volName = 
raidId = -1
raidName = /dev/sdj6
encryption = no
mappingName = /dev/sdj6
qnapResize = no
delayAlloc = yes
privilege = no
readOnly = no
writeCache = yes
invisible = no
raidLevel = -2
partNo = 6
isGlobalSpare = no
diskId = 0x00210003
status = -1
filesystem = 7
internal = 0
time = Wed Sep 15 08:19:43 2021
unclean = no
need_rehash = no
creating = no