hello i have strange problem with multipath my configuration is: sunfire x4100 with 2 lsi sas 3442-e cards connected to promise vtrak e310s (mptsas driver) after i boot and multipath-tools is not installed, it look like this redneck:~# lsscsi [0:0:0:0] cd/dvd AMI Virtual CDROM 1.00 /dev/scd0 [1:0:0:0] disk AMI Virtual Floppy 1.00 /dev/sdb [2:0:0:0] disk Promise VTrak E310s 0322 /dev/sda [3:0:0:0] disk Promise VTrak E310s 0322 /dev/sdc [4:0:0:0] disk SEAGATE ST973402SSUN72G 0400 - [4:0:1:0] disk SEAGATE ST973402SSUN72G 0400 - [4:1:0:0] disk LSILOGIC Logical Volume 3000 /dev/sdd redneck:~# pvs Found duplicate PV tS0KIb4H0CVGAspUqdWIkZSUVSwMlwib: using /dev/sdc not /dev/sda PV VG Fmt Attr PSize PFree /dev/sdc vg0 lvm2 a- 2.32T 3.00G and i want create multipath failover device with sda and sdc (and on top of that device i want use LVM) when i install multipath-tools (debian 4.0) apt-get install multipath-tools it automatically start multipathd, but it is in D state, it freeze somewhere multipathd -k dont work sda/sdc is not accessible, every proces accessing sda/sdc go to D state and after some minutes there are some mesasges from kernel: Oct 18 21:00:15 redneck kernel: mptscsih: ioc1: attempting task abort! (sc=ffff8102157fc080) Oct 18 21:00:15 redneck kernel: sd 0:0:0:0: [sda] CDB: Read(10): 28 00 00 00 00 00 00 00 01 00 Oct 18 21:00:19 redneck kernel: mptbase: ioc0: LogInfo(0x31140000): Originator={PL}, Code={IO Executed}, SubCode(0x0000) Oct 18 21:00:19 redneck kernel: mptscsih: ioc0: task abort: SUCCESS (sc=ffff8102157fc080) Oct 18 21:00:29 redneck kernel: mptscsih: ioc0: attempting task abort! (sc=ffff8102157fc080) Oct 18 21:00:29 redneck kernel: sd 0:0:0:0: [sda] CDB: Test Unit Ready: 00 00 00 00 00 00 Oct 18 21:00:34 redneck kernel: mptbase: ioc0: LogInfo(0x31140000): Originator={PL}, Code={IO Executed}, SubCode(0x0000) Oct 18 21:00:34 redneck kernel: mptscsih: ioc0: task abort: SUCCESS (sc=ffff8102157fc080) Oct 18 21:00:34 redneck kernel: mptscsih: ioc0: attempting task abort! (sc=ffff8104163c30c0) Oct 18 21:00:34 redneck kernel: sd 0:0:0:0: [sda] CDB: Read(10): 28 00 00 00 00 00 00 00 01 00 Oct 18 21:00:39 redneck kernel: mptbase: ioc0: LogInfo(0x31140000): Originator={PL}, Code={IO Executed}, SubCode(0x0000) Oct 19 21:00:39 redneck kernel: mptscsih: ioc0: task abort: SUCCESS (sc=ffff8104163c30c0) Oct 18 21:00:49 redneck kernel: mptscsih: ioc0: attempting task abort! (sc=ffff8104163c30c0) Oct 18 21:00:49 redneck kernel: sd 0:0:0:0: [sda] CDB: Test Unit Ready: 00 00 00 00 00 00 Oct 18 21:00:50 redneck kernel: mptbase: ioc0: LogInfo(0x31140000): Originator={PL}, Code={IO Executed}, SubCode(0x0000) Oct 18 21:00:50 redneck kernel: mptscsih: ioc0: Response Code(0x00000005): F/W: The requested task failed. Oct 18 21:00:50 redneck kernel: mptscsih: ioc0: task abort: SUCCESS (sc=ffff8104163c30c0) Oct 18 21:00:50 redneck kernel: mptscsih: ioc0: attempting target reset! (sc=ffff8102157fc080) Oct 18 21:00:50 redneck kernel: sd 0:0:0:0: [sda] CDB: Read(10): 28 00 00 00 00 00 00 00 01 00 Oct 18 21:00:52 redneck kernel: mptscsih: ioc0: Issue of TaskMgmt failed! Oct 18 21:00:52 redneck kernel: mptscsih: ioc0: target reset: FAILED (sc=ffff8102157fc080) Oct 18 21:00:52 redneck kernel: mptscsih: ioc0: attempting bus reset! (sc=ffff8102157fc080) Oct 18 21:00:52 redneck kernel: sd 0:0:0:0: [sda] CDB: Read(10): 28 00 00 00 00 00 00 00 01 00 Oct 18 21:01:07 redneck kernel: mptbase: Initiating ioc0 recovery Oct 18 21:01:07 redneck kernel: mptscsih: ioc0: Issue of TaskMgmt failed! Oct 18 21:01:07 redneck kernel: mptscsih: ioc0: bus reset: FAILED (sc=ffff8102157fc080) Oct 18 21:01:07 redneck kernel: mptscsih: ioc0: attempting host reset! (sc=ffff8102157fc080) Oct 18 21:01:07 redneck kernel: mptbase: Initiating ioc0 recovery Oct 18 21:01:21 redneck kernel: mptscsih: ioc0: host reset: SUCCESS (sc=ffff8102157fc080) Oct 18 21:01:21 redneck kernel: sd 0:0:0:0: scsi: Device offlined - not ready after error recovery Oct 18 21:01:21 redneck kernel: sd 0:0:0:0: scsi: Device offlined - not ready after error recovery Oct 18 21:01:21 redneck kernel: sd 0:0:0:0: rejecting I/O to offline device where can be the problem ? in mptsas/mptscsih/mptbase driver or dm-multipath ? thanks -- Pavel Stano -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel