Public bug reported:
In the setup with kubernetes cluster v1.27.10 installed on Ubuntu-Server
22.04.5 2025.11.06, trident CSI is unable to mount the LUNs and fails
with the error "multipath device not found".
The setup worked for few LUNs mount but fails intermittently with below
kernel logs:
[17613.534218] perf: interrupt took too long (2530 > 2500), lowering
kernel.perf_event_max_sample_rate to 79000
[18215.948201] device-mapper: table: 253:12: multipath: error getting device
[18215.948205] device-mapper: ioctl: error adding target to table
[18215.949056] device-mapper: table: 253:12: multipath: error getting device
[18215.949059] device-mapper: ioctl: error adding target to table
[18235.524737] sd 5:0:1:10: Warning! Received an indication that the LUN
assignments on this target have changed. The Linux SCSI layer does not
automatical
[18235.602613] sd 5:0:0:0: Warning! Received an indication that the LUN
assignments on this target have changed. The Linux SCSI layer does not
automatical
[18235.745449] sd 5:0:1:9: Warning! Received an indication that the LUN
assignments on this target have changed. The Linux SCSI layer does not
automatical
[18236.040945] sd 5:0:0:11: Warning! Received an indication that the LUN
assignments on this target have changed. The Linux SCSI layer does not
automatical
[18236.257476] sd 5:0:1:9: Warning! Received an indication that the LUN
assignments on this target have changed. The Linux SCSI layer does not
automatical
[18236.995215] sd 5:0:0:1: Warning! Received an indication that the LUN
assignments on this target have changed. The Linux SCSI layer does not
automatical
[18242.285505] scsi 5:0:0:13: Direct-Access NETAPP LUN C-Mode 9161
PQ: 0 ANSI: 5
[18242.286862] scsi 5:0:0:13: alua: supports implicit TPGS
[18242.286883] scsi 5:0:0:13: alua: device naa.600a0980383235416a5d5a4555477964
port group 3e8 rel port 1
[18242.287343] sd 5:0:0:13: Attached scsi generic sg26 type 0
[18242.287535] sd 5:0:0:13: Power-on or device reset occurred
[18242.290462] scsi 5:0:1:13: Direct-Access NETAPP LUN C-Mode 9161
PQ: 0 ANSI: 5
[18242.291761] scsi 5:0:1:13: alua: supports implicit TPGS
[18242.291773] scsi 5:0:1:13: alua: device naa.600a0980383235416a5d5a4555477964
port group 3e9 rel port 5
[18242.292104] sd 5:0:1:13: Attached scsi generic sg27 type 0
[18242.292420] sd 5:0:1:13: Power-on or device reset occurred
[18242.301713] sd 5:0:0:13: alua: transition timeout set to 120 seconds
[18242.301719] sd 5:0:0:13: alua: port group 3e8 state N non-preferred supports
TolUsNA
[18242.301749] sd 5:0:1:13: alua: transition timeout set to 120 seconds
[18242.301752] sd 5:0:1:13: alua: port group 3e9 state A non-preferred supports
TolUsNA
[18242.302723] sd 5:0:0:13: [sdz] 1006632960 512-byte logical blocks: (515
GB/480 GiB)
[18242.302728] sd 5:0:0:13: [sdz] 4096-byte physical blocks
[18242.303062] sd 5:0:0:13: [sdz] Write Protect is off
[18242.303066] sd 5:0:0:13: [sdz] Mode Sense: af 00 00 08
[18242.303065] sd 5:0:1:13: [sdaa] 1006632960 512-byte logical blocks: (515
GB/480 GiB)
[18242.303077] sd 5:0:1:13: [sdaa] 4096-byte physical blocks
[18242.303148] sd 5:0:0:13: [sdz] Write cache: disabled, read cache: enabled,
doesn't support DPO or FUA
[18242.303360] sd 5:0:1:13: [sdaa] Write Protect is off
[18242.303366] sd 5:0:1:13: [sdaa] Mode Sense: af 00 00 08
[18242.303651] sd 5:0:0:13: [sdz] Optimal transfer size 65536 bytes
[18242.303809] sd 5:0:1:13: [sdaa] Write cache: disabled, read cache: enabled,
doesn't support DPO or FUA
[18242.304968] sd 5:0:1:13: [sdaa] Optimal transfer size 65536 bytes
[18242.310082] sdaa: sdaa1 sdaa2 sdaa3
[18242.311047] sdz: sdz1 sdz2 sdz3
[18242.313172] sd 5:0:1:13: [sdaa] Attached SCSI disk
[18242.314069] sd 5:0:0:13: [sdz] Attached SCSI disk
[18243.757733] scsi 5:0:0:14: Direct-Access NETAPP LUN C-Mode 9161
PQ: 0 ANSI: 5
[18243.759391] scsi 5:0:0:14: alua: supports implicit TPGS
[18243.759412] scsi 5:0:0:14: alua: device naa.600a0980383235416a5d5a4555477a49
port group 3e8 rel port 1
[18243.759815] sd 5:0:0:14: Attached scsi generic sg28 type 0
[18243.760215] sd 5:0:0:14: Power-on or device reset occurred
[18243.761644] scsi 5:0:1:14: Direct-Access NETAPP LUN C-Mode 9161
PQ: 0 ANSI: 5
[18243.763183] scsi 5:0:1:14: alua: supports implicit TPGS
[18243.763189] scsi 5:0:1:14: alua: device naa.600a0980383235416a5d5a4555477a49
port group 3e9 rel port 5
[18243.763394] sd 5:0:1:14: Attached scsi generic sg29 type 0
[18243.763643] sd 5:0:1:14: Power-on or device reset occurred
[18243.773888] sd 5:0:0:14: alua: transition timeout set to 120 seconds
[18243.773895] sd 5:0:0:14: alua: port group 3e8 state N non-preferred supports
TolUsNA
[18243.775342] sd 5:0:0:14: [sdab] 230686720000 512-byte logical blocks: (118
TB/107 TiB)
[18243.775348] sd 5:0:0:14: [sdab] 4096-byte physical blocks
[18243.775667] sd 5:0:0:14: [sdab] Write Protect is off
[18243.775672] sd 5:0:0:14: [sdab] Mode Sense: af 00 00 08
[18243.776118] sd 5:0:0:14: [sdab] Write cache: disabled, read cache: enabled,
doesn't support DPO or FUA
[18243.776930] sd 5:0:0:14: [sdab] Optimal transfer size 65536 bytes
[18243.777659] sd 5:0:1:14: alua: transition timeout set to 120 seconds
[18243.777664] sd 5:0:1:14: alua: port group 3e9 state A non-preferred supports
TolUsNA
[18243.778143] sd 5:0:1:14: [sdac] 230686720000 512-byte logical blocks: (118
TB/107 TiB)
[18243.778147] sd 5:0:1:14: [sdac] 4096-byte physical blocks
[18243.778221] sd 5:0:1:14: [sdac] Write Protect is off
[18243.778224] sd 5:0:1:14: [sdac] Mode Sense: af 00 00 08
[18243.778619] sd 5:0:1:14: [sdac] Write cache: disabled, read cache: enabled,
doesn't support DPO or FUA
[18243.779092] sd 5:0:1:14: [sdac] Optimal transfer size 65536 bytes
[18243.787398] sd 5:0:0:14: [sdab] Attached SCSI disk
[18243.788982] sd 5:0:1:14: [sdac] Attached SCSI disk
[18261.216257] scsi 5:0:0:12: Direct-Access NETAPP LUN C-Mode 9161
PQ: 0 ANSI: 5
[18261.217741] scsi 5:0:0:12: alua: supports implicit TPGS
[18261.217761] scsi 5:0:0:12: alua: device naa.600a0980383235416a5d5a4555477a4a
port group 3e8 rel port 1
[18261.218259] sd 5:0:0:12: Attached scsi generic sg30 type 0
[18261.218385] sd 5:0:0:12: Power-on or device reset occurred
[18261.220635] scsi 5:0:1:12: Direct-Access NETAPP LUN C-Mode 9161
PQ: 0 ANSI: 5
[18261.222171] scsi 5:0:1:12: alua: supports implicit TPGS
[18261.222178] scsi 5:0:1:12: alua: device naa.600a0980383235416a5d5a4555477a4a
port group 3e9 rel port 5
[18261.222374] sd 5:0:1:12: Attached scsi generic sg31 type 0
[18261.222742] sd 5:0:1:12: Power-on or device reset occurred
[18261.229833] sd 5:0:0:12: alua: transition timeout set to 120 seconds
[18261.229838] sd 5:0:0:12: alua: port group 3e8 state N non-preferred supports
TolUsNA
[18261.230373] sd 5:0:0:12: [sdad] 230686720000 512-byte logical blocks: (118
TB/107 TiB)
[18261.230381] sd 5:0:0:12: [sdad] 4096-byte physical blocks
[18261.230437] sd 5:0:0:12: [sdad] Write Protect is off
[18261.230443] sd 5:0:0:12: [sdad] Mode Sense: af 00 00 08
[18261.230824] sd 5:0:0:12: [sdad] Write cache: disabled, read cache: enabled,
doesn't support DPO or FUA
[18261.231682] sd 5:0:0:12: [sdad] Optimal transfer size 65536 bytes
[18261.237642] sd 5:0:1:12: alua: transition timeout set to 120 seconds
[18261.237647] sd 5:0:1:12: alua: port group 3e9 state A non-preferred supports
TolUsNA
[18261.238384] sd 5:0:1:12: [sdae] 230686720000 512-byte logical blocks: (118
TB/107 TiB)
[18261.238392] sd 5:0:1:12: [sdae] 4096-byte physical blocks
[18261.238742] sd 5:0:1:12: [sdae] Write Protect is off
[18261.238748] sd 5:0:1:12: [sdae] Mode Sense: af 00 00 08
[18261.238840] sd 5:0:1:12: [sdae] Write cache: disabled, read cache: enabled,
doesn't support DPO or FUA
[18261.239618] sd 5:0:1:12: [sdae] Optimal transfer size 65536 bytes
[18261.242706] sd 5:0:0:12: [sdad] Attached SCSI disk
[18261.248478] sd 5:0:1:12: [sdae] Attached SCSI disk
[18279.255378] loop9: detected capacity change from 0 to 1006632960
[19174.037572] device-mapper: table: 253:12: multipath: error getting device
[19174.037576] device-mapper: ioctl: error adding target to table
[19174.038245] device-mapper: table: 253:12: multipath: error getting device
[19174.038248] device-mapper: ioctl: error adding target to table
-----------------------------------------------------------------------
Note: Here trident is not an issue since it works for few PVCs as well
as we're able to see the LUNs in lsblk output. The only thing is that
multipath fails to map that LUN.
Is there any limit on the number of LUNs can be mounted on the Ubuntu
22.04 or the total capacity of LUNs can be mounted ?
lsb_release -rd
Description: Ubuntu-Server 22.04.5 2025.11.06 (Cubic 2025-11-06 11:34)
Release: 22.04
# cat version.log
Ubuntu 5.15.0-119.129-generic 5.15.160
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2133839
Title:
multipath: error getting device
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