Help! multipath of iscsi device doesn't work!

[Butler <tears.the@xxxxxxxxx>]

Dear all,

I tried to use dm-multipath to access a iscsi-target (IET) with open-iscsi. However, I have no luck to make it work.

I connect to the same target with 2 NIC and connect with open-iscsi as 2 devices (/dev/sdb & /dev/sdc).

$ /sbin/scsi_id -g -u -s /block/sda
1ATA_____ST3120813AS_________________________________________3LS09TWT
$ /sbin/scsi_id -g -u -s /block/sdb
14945540000000000325f3000000000000000000000000000
$/sbin/scsi_id -g -u -s /block/sdc
14945540000000000325f3000000000000000000000000000

where sda is internal SATA disk,

sdb & sdc are iscsi devices of the same target thru 2 NIC.

When I start multpathd, I found the following error message :
   Sep 25 17:03:34 liverpool multipathd: error calling out /sbin/scsi_id -g -u -s /block/sdb

Then I tried to use "multipath -v2"  but nothing happen.

Please help! Thanks a lot!

open-iscsi version : v1.1-619
linux : 2.6.17-1.2142_FC4smp


Full log message:

Sep 25 16:39:31 liverpool kernel: device-mapper: dm-multipath version 1.0.4 loaded
Sep 25 16:39:43 liverpool kernel: device-mapper: dm-round-robin version 1.0.0 loaded

Sep 25 17:01:23 liverpool kernel: scsi8 : iSCSI Initiator over TCP/IP, v1.1-619
Sep 25 17:01:24 liverpool kernel:   Vendor: IET       Model: VIRTUAL-DISK      Rev: 0
Sep 25 17:01:24 liverpool kernel:   Type:   Direct-Access                      ANSI SCSI revision: 04
Sep 25 17:01:24 liverpool kernel: SCSI device sdb: 12582912 512-byte hdwr sectors (6442 MB)
Sep 25 17:01:24 liverpool kernel: sdb: Write Protect is off
Sep 25 17:01:24 liverpool kernel: SCSI device sdb: drive cache: write back
Sep 25 17:01:24 liverpool kernel: SCSI device sdb: 12582912 512-byte hdwr sectors (6442 MB)
Sep 25 17:01:24 liverpool kernel: sdb: Write Protect is off
Sep 25 17:01:24 liverpool kernel: SCSI device sdb: drive cache: write back
Sep 25 17:01:24 liverpool kernel:  sdb: sdb1
Sep 25 17:01:24 liverpool kernel: sd 8:0:0:0: Attached scsi disk sdb
Sep 25 17:01:24 liverpool iscsid: connection4:0 is operational now
Sep 25 17:01:24 liverpool scsi.agent[4618]: disk at /devices/platform/host8/session4/target8:0:0/8:0:0:0
Sep 25 17:01:31 liverpool kernel: scsi9 : iSCSI Initiator over TCP/IP, v1.1-619
Sep 25 17:01:32 liverpool iscsid: picking unique OUI for the same target node name iqn.2006-09.com.myhost:storage.vg2-sn-abcde
Sep 25 17:01:32 liverpool kernel:   Vendor: IET       Model: VIRTUAL-DISK      Rev: 0
Sep 25 17:01:32 liverpool kernel:   Type:   Direct-Access                      ANSI SCSI revision: 04
Sep 25 17:01:32 liverpool kernel: SCSI device sdc: 12582912 512-byte hdwr sectors (6442 MB)
Sep 25 17:01:32 liverpool kernel: sdc: Write Protect is off
Sep 25 17:01:32 liverpool kernel: SCSI device sdc: drive cache: write back
Sep 25 17:01:32 liverpool kernel: SCSI device sdc: 12582912 512-byte hdwr sectors (6442 MB)
Sep 25 17:01:32 liverpool kernel: sdc: Write Protect is off
Sep 25 17:01:32 liverpool kernel: SCSI device sdc: drive cache: write back
Sep 25 17:01:32 liverpool kernel:  sdc: sdc1
Sep 25 17:01:32 liverpool kernel: sd 9:0:0:0: Attached scsi disk sdc
Sep 25 17:01:33 liverpool scsi.agent[4693]: disk at /devices/platform/host9/session5/target9:0:0/9:0:0:0
Sep 25 17:01:33 liverpool iscsid: connection5:0 is operational now

Sep 25 17:03:34 liverpool multipathd: --------start up--------
Sep 25 17:03:34 liverpool multipathd: read /etc/multipath.conf
Sep 25 17:03:34 liverpool multipathd: ramfs maxsize is 100706
Sep 25 17:03:34 liverpool multipathd: start DM events thread
Sep 25 17:03:34 liverpool multipathd: initial reconfigure multipath maps
Sep 25 17:03:34 liverpool multipathd: path checkers start up
Sep 25 17:03:34 liverpool multipathd: refresh devmaps list
Sep 25 17:03:34 liverpool multipathd: refresh paths list
Sep 25 17:03:34 liverpool multipathd: dm-0 blacklisted
Sep 25 17:03:34 liverpool multipathd: fd0 blacklisted
Sep 25 17:03:34 liverpool multipathd: path hda not found in pathvec
Sep 25 17:03:34 liverpool multipathd: ===== path hda =====
Sep 25 17:03:34 liverpool multipathd: md0 blacklisted
Sep 25 17:03:34 liverpool multipathd: ram0 blacklisted
Sep 25 17:03:34 liverpool multipathd: ram10 blacklisted
Sep 25 17:03:34 liverpool multipathd: ram11 blacklisted
Sep 25 17:03:34 liverpool multipathd: ram12 blacklisted
Sep 25 17:03:34 liverpool multipathd: ram13 blacklisted
Sep 25 17:03:34 liverpool multipathd: ram14 blacklisted
Sep 25 17:03:34 liverpool multipathd: ram15 blacklisted
Sep 25 17:03:34 liverpool multipathd: ram1 blacklisted
Sep 25 17:03:34 liverpool multipathd: ram2 blacklisted
Sep 25 17:03:34 liverpool multipathd: ram3 blacklisted
Sep 25 17:03:34 liverpool multipathd: ram4 blacklisted
Sep 25 17:03:34 liverpool multipathd: ram5 blacklisted
Sep 25 17:03:34 liverpool multipathd: ram6 blacklisted
Sep 25 17:03:34 liverpool multipathd: ram7 blacklisted
Sep 25 17:03:34 liverpool multipathd: ram8 blacklisted
Sep 25 17:03:34 liverpool multipathd: ram9 blacklisted
Sep 25 17:03:34 liverpool multipathd: path sda not found in pathvec
Sep 25 17:03:34 liverpool multipathd: ===== path sda =====
Sep 25 17:03:34 liverpool multipathd: vendor = ATA
Sep 25 17:03:34 liverpool multipathd: product = ST3120813AS
Sep 25 17:03:34 liverpool multipathd: rev = 2AAA
Sep 25 17:03:34 liverpool multipathd: dev_t = 8:0
Sep 25 17:03:34 liverpool multipathd: size = 234441648
Sep 25 17:03:34 liverpool multipathd: h:b:t:l = 1:0:0:0
Sep 25 17:03:34 liverpool multipathd: tgt_node_name =
Sep 25 17:03:34 liverpool multipathd: serial =             3LS09TWT
Sep 25 17:03:34 liverpool multipathd: path checker = readsector0 (internal default)
Sep 25 17:03:34 liverpool multipathd: state = 2
Sep 25 17:03:34 liverpool multipathd: getprio = (null) (internal default)
Sep 25 17:03:34 liverpool multipathd: prio = 1
Sep 25 17:03:34 liverpool multipathd: getuid = /sbin/scsi_id -g -u -s /block/%n (internal default)
Sep 25 17:03:34 liverpool multipathd: error calling out /sbin/scsi_id -g -u -s /block/sda
Sep 25 17:03:34 liverpool multipathd: uid =  (callout)
Sep 25 17:03:34 liverpool multipathd: path sdb not found in pathvec
Sep 25 17:03:34 liverpool multipathd: ===== path sdb =====
Sep 25 17:03:34 liverpool multipathd: vendor = IET
Sep 25 17:03:34 liverpool multipathd: product = VIRTUAL-DISK
Sep 25 17:03:34 liverpool multipathd: rev = 0
Sep 25 17:03:34 liverpool multipathd: dev_t = 8:16
Sep 25 17:03:34 liverpool multipathd: size = 12582912
Sep 25 17:03:34 liverpool multipathd: h:b:t:l = 8:0:0:0
Sep 25 17:03:34 liverpool multipathd: tgt_node_name =
Sep 25 17:03:34 liverpool multipathd: serial =
Sep 25 17:03:34 liverpool multipathd: path checker = readsector0 (internal default)
Sep 25 17:03:34 liverpool multipathd: state = 2
Sep 25 17:03:34 liverpool multipathd: getprio = (null) (internal default)
Sep 25 17:03:34 liverpool multipathd: prio = 1
Sep 25 17:03:34 liverpool multipathd: getuid = /sbin/scsi_id -g -u -s /block/%n (internal default)
Sep 25 17:03:34 liverpool multipathd: error calling out /sbin/scsi_id -g -u -s /block/sdb
Sep 25 17:03:34 liverpool multipathd: uid =  (callout)
Sep 25 17:03:34 liverpool multipathd: path sdc not found in pathvec
Sep 25 17:03:34 liverpool multipathd: ===== path sdc =====
Sep 25 17:03:34 liverpool multipathd: vendor = IET
Sep 25 17:03:34 liverpool multipathd: product = VIRTUAL-DISK
Sep 25 17:03:34 liverpool multipathd: rev = 0
Sep 25 17:03:34 liverpool multipathd: dev_t = 8:32
Sep 25 17:03:34 liverpool multipathd: size = 12582912
Sep 25 17:03:35 liverpool multipathd: h:b:t:l = 9:0:0:0
Sep 25 17:03:35 liverpool multipathd: tgt_node_name =
Sep 25 17:03:35 liverpool multipathd: state = 2
Sep 25 17:03:35 liverpool multipathd: prio = 1
Sep 25 17:03:44 liverpool multipathd: ===== path hda =====
Sep 25 17:03:44 liverpool multipathd: path checker = readsector0 (internal default)
Sep 25 17:03:44 liverpool multipathd: : no usable fd
Sep 25 17:03:44 liverpool multipathd: reconfigure  multipath
Sep 25 17:03:44 liverpool multipathd: refresh devmaps list
Sep 25 17:03:44 liverpool multipathd: refresh paths list
Sep 25 17:03:44 liverpool multipathd: dm-0 blacklisted
Sep 25 17:03:44 liverpool multipathd: fd0 blacklisted
Sep 25 17:03:44 liverpool multipathd: ===== path hda =====
Sep 25 17:03:44 liverpool multipathd: md0 blacklisted
Sep 25 17:03:44 liverpool multipathd: ram0 blacklisted
Sep 25 17:03:44 liverpool multipathd: ram10 blacklisted
Sep 25 17:03:44 liverpool multipathd: ram11 blacklisted
Sep 25 17:03:44 liverpool multipathd: ram12 blacklisted
Sep 25 17:03:44 liverpool multipathd: ram13 blacklisted
Sep 25 17:03:44 liverpool multipathd: ram14 blacklisted
Sep 25 17:03:44 liverpool multipathd: ram15 blacklisted
Sep 25 17:03:44 liverpool multipathd: ram1 blacklisted
Sep 25 17:03:44 liverpool multipathd: ram2 blacklisted
Sep 25 17:03:44 liverpool multipathd: ram3 blacklisted
Sep 25 17:03:44 liverpool multipathd: ram4 blacklisted
Sep 25 17:03:44 liverpool multipathd: ram5 blacklisted
Sep 25 17:03:44 liverpool multipathd: ram6 blacklisted
Sep 25 17:03:44 liverpool multipathd: ram7 blacklisted
Sep 25 17:03:44 liverpool multipathd: ram8 blacklisted
Sep 25 17:03:44 liverpool multipathd: ram9 blacklisted
Sep 25 17:03:44 liverpool multipathd: ===== path sda =====
Sep 25 17:03:44 liverpool multipathd: path checker = readsector0 (internal default)
Sep 25 17:03:44 liverpool multipathd: ===== path sdb =====
Sep 25 17:03:44 liverpool multipathd: path checker = readsector0 (internal default)
Sep 25 17:03:44 liverpool multipathd: ===== path sdc =====
Sep 25 17:03:44 liverpool multipathd: path checker = readsector0 (internal default)
Sep 25 17:03:44 liverpool multipathd: start up event loops
Sep 25 17:03:44 liverpool multipathd: 0 pending event(s)

--
Butler

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