@Gorka Eguileor: I can try to reproduce this case with recheck_wwid option set to true when a valid package of multipath-tools will be available for ubuntu 20.04. What I can add is that it happened only for one compute node, but I've seen similar warnings in other compute nodes in dmesg -T output, which looks dangerously, but so far I haven't faced similar issue there: [Thu Feb 9 14:28:16 2023] scsi_io_completion: 42 callbacks suppressed [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#2 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#2 Sense Key : Illegal Request [current] [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#2 Add. Sense: Logical unit not supported [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#2 CDB: Read(10) 28 00 03 bf ff 00 00 00 08 00 [Thu Feb 9 14:28:16 2023] print_req_error: 42 callbacks suppressed [Thu Feb 9 14:28:16 2023] print_req_error: I/O error, dev sdgr, sector 62914304 [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#2 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#2 Sense Key : Illegal Request [current] [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#2 Add. Sense: Logical unit not supported [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#2 CDB: Read(10) 28 00 03 bf ff 00 00 00 01 00 [Thu Feb 9 14:28:16 2023] print_req_error: I/O error, dev sdgr, sector 62914304 [Thu Feb 9 14:28:16 2023] buffer_io_error: 30 callbacks suppressed [Thu Feb 9 14:28:16 2023] Buffer I/O error on dev sdgr1, logical block 62686976, async page read [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#3 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#3 Sense Key : Illegal Request [current] [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#3 Add. Sense: Logical unit not supported [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#3 CDB: Read(10) 28 00 03 bf ff 01 00 00 01 00 [Thu Feb 9 14:28:16 2023] print_req_error: I/O error, dev sdgr, sector 62914305 [Thu Feb 9 14:28:16 2023] Buffer I/O error on dev sdgr1, logical block 62686977, async page read [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#4 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#4 Sense Key : Illegal Request [current] [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#4 Add. Sense: Logical unit not supported [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#4 CDB: Read(10) 28 00 03 bf ff 02 00 00 01 00 [Thu Feb 9 14:28:16 2023] print_req_error: I/O error, dev sdgr, sector 62914306 [Thu Feb 9 14:28:16 2023] Buffer I/O error on dev sdgr1, logical block 62686978, async page read [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#5 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#5 Sense Key : Illegal Request [current] [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#5 Add. Sense: Logical unit not supported [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#5 CDB: Read(10) 28 00 03 bf ff 03 00 00 01 00 [Thu Feb 9 14:28:16 2023] print_req_error: I/O error, dev sdgr, sector 62914307 [Thu Feb 9 14:28:16 2023] Buffer I/O error on dev sdgr1, logical block 62686979, async page read [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#6 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#6 Sense Key : Illegal Request [current] [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#6 Add. Sense: Logical unit not supported [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#6 CDB: Read(10) 28 00 03 bf ff 04 00 00 01 00 [Thu Feb 9 14:28:16 2023] print_req_error: I/O error, dev sdgr, sector 62914308 [Thu Feb 9 14:28:16 2023] Buffer I/O error on dev sdgr1, logical block 62686980, async page read [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#7 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#7 Sense Key : Illegal Request [current] [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#7 Add. Sense: Logical unit not supported [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#7 CDB: Read(10) 28 00 03 bf ff 05 00 00 01 00 [Thu Feb 9 14:28:16 2023] print_req_error: I/O error, dev sdgr, sector 62914309 [Thu Feb 9 14:28:16 2023] Buffer I/O error on dev sdgr1, logical block 62686981, async page read [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#8 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#8 Sense Key : Illegal Request [current] [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#8 Add. Sense: Logical unit not supported [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#8 CDB: Read(10) 28 00 03 bf ff 06 00 00 01 00 [Thu Feb 9 14:28:16 2023] print_req_error: I/O error, dev sdgr, sector 62914310 [Thu Feb 9 14:28:16 2023] Buffer I/O error on dev sdgr1, logical block 62686982, async page read [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#9 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#9 Sense Key : Illegal Request [current] [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#9 Add. Sense: Logical unit not supported [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#9 CDB: Read(10) 28 00 03 bf ff 07 00 00 01 00 [Thu Feb 9 14:28:16 2023] print_req_error: I/O error, dev sdgr, sector 62914311 [Thu Feb 9 14:28:16 2023] Buffer I/O error on dev sdgr1, logical block 62686983, async page read [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#3 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#3 Sense Key : Illegal Request [current] [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#3 Add. Sense: Logical unit not supported [Thu Feb 9 14:28:16 2023] sd 15:0:0:98: [sdgr] tag#3 CDB: Read(10) 28 00 00 00 27 80 00 00 08 00 [Thu Feb 9 14:28:16 2023] print_req_error: I/O error, dev sdgr, sector 10112 [Thu Feb 9 14:28:16 2023] Buffer I/O error on dev sdgr14, logical block 1008, async page read [Thu Feb 9 14:28:16 2023] Buffer I/O error on dev sdgr15, logical block 27120, async page read That repeats every ~15 minutes. Anyway, I would like to add such prints from dmesg, maybe this way it can show you something which I can't see from my pov.