Problem with Multipath

[Nigel Reed]

Hi all,

Here's the scenario. I've installed multipath on a DL385 G2 along with all the latest firmware and psp. When I try to run multipath I get the following error:
-sh-3.00# multipath
error calling out /sbin/mpath_prio_alua /dev/sda
error calling out /sbin/mpath_prio_alua /dev/sdb
error calling out /sbin/mpath_prio_alua /dev/sdc
error calling out /sbin/mpath_prio_alua /dev/sdd

I get the same issue whether I use the redhat supplied driver or the HP one from the psp kit. It seems the psp one interferes with some other modules but that's another issue.


Here's some infomation.
-sh-3.00# uname -a
Linux daa30304orc004.managed.cln 2.6.9-100.ELsmp #1 SMP Tue Feb 1 12:04:42 EST 2011 x86_64 x86_64 x86_64 GNU/Linux

-sh-3.00# lspci|grep QL
0a:00.0 Fibre Channel: QLogic Corp. ISP2432-based 4Gb Fibre Channel to PCI Express HBA (rev 02)
0a:00.1 Fibre Channel: QLogic Corp. ISP2432-based 4Gb Fibre Channel to PCI Express HBA (rev 02)

-sh-3.00# lspci|grep QL
0a:00.0 Fibre Channel: QLogic Corp. ISP2432-based 4Gb Fibre Channel to PCI Express HBA (rev 02)
0a:00.1 Fibre Channel: QLogic Corp. ISP2432-based 4Gb Fibre Channel to PCI Express HBA (rev 02)
-sh-3.00# cat /proc/scsi/qla2xxx/
cat: /proc/scsi/qla2xxx/: Is a directory
-sh-3.00# cat /proc/scsi/qla2xxx/0
QLogic PCI to Fibre Channel Host Adapter for HPAE312A:
Firmware version 4.06.03 [IP] [84XX] , Driver version 8.02.23
BIOS version 2.02
FCODE version 2.00
EFI version 2.00
Flash FW version 4.03.02 0482
ISP: ISP2432, Serial# MXK070163M

-sh-3.00# sg_inq /dev/sda
standard INQUIRY:
PQual=0 Device_type=0 RMB=0 version=0x04 [SPC-2]
[AERC=0] [TrmTsk=0] NormACA=1 HiSUP=1 Resp_data_format=2
SCCS=0 ACC=0 TGPS=0 3PC=0 Protect=0 BQue=0
EncServ=0 MultiP=1 (VS=0) [MChngr=0] [ACKREQQ=0] Addr16=0
[RelAdr=0] WBus16=0 Sync=0 Linked=0 [TranDis=0] CmdQue=1
Clocking=0x0 QAS=0 IUS=0
length=117 (0x75) Peripheral device type: disk
Vendor identification: NETAPP
Product identification: LUN
Product revision level: 7310
Unit serial number: W-D4Z4cZzqoN

I've seen that TGPS=0 could be the problem but I have another box which also has that set to 0 and seems to work.

-sh-3.00# rpm -qa|grep mapper
device-mapper-1.02.28-3.el4
device-mapper-multipath-0.4.5-42.el4
device-mapper-1.02.28-3.el4

-sh-3.00# /sbin/mpath_prio_alua -v /dev/sda
Target port groups are not supported.
Google only shows 1 result for that error message.

One thing I noticed at bootup is that that sg module is not automatically loaded. It is on another box, but it's not in modprobe.conf and it's not in the initrd file either.

Right now, I'm at a loss and looking for any hints or suggestions.

[Nigel Reed]

I forgot to mention I'm using RHEL ES 4.9 fully patched.