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
NOTE: The NAS has eight 8TB WD-RED disks.