Multipathing

[khalid rasool_2]

Hi all,
I have two ML570G4 with MSA 2000 storage.In ML570 I have two Emulex HBA. OS is RHEL 4.6 and kernel version is 2.6.9-42.ELsmp. Emulex driver which I am using is hp-lpfc-8.0.16.40-5. Problem is that I configured 4 logical drives in MSA2000 now problem is that on linux it showing 8 logical drives. question is that is secure path available for RHEL4 or is any other procedure to configure these paths or drives.

[Jeeshan]

all logical drives is sourced from one logical drive.
you need to partitioned this drive.

[Steven E. Protter]

Shalom,

multipath is built into the OS. If there are two paths it will be recongized.

RHEL 4.6 and kernel version is 2.6.9-42.ELsmp.

The kernel version you state does not match RHEL 4.6. This inconsistency can cause loss of functionality.

SEP

[khalid rasool_2]

Sorry, you are right we are using RHEL AS 4.4, Is multi path built in this version or I have to update this version.I also downloded Linux update 5 and Device mapper enablement kit for HP.Can you tell me the installation procedure of DM 4.0.0.
Thanks for correction......
Regards

[Jimmy Vance]

Secure Path for Linux has not been actively developed for quite some time as it has been abandoned in favor of using Device Mapper MPIO. Device Mapper multipathing has improved greatly since RHEL4.4. You should get the latest update which I think is RHEL4.7.

To enable multipathing
# chkconfig multipathd on
# serivice multipathd start

The command
# multipath -l
will show you the paths recognised.

You may need to create the /etc/multipath.conf file as I'm not sure the code in RHEL4.7 understands the MSA2000. The documentation in the HP DM kit v4 shows the values for the file.

[khalid rasool_2]

Thanks for reply, I have configured multi pathing thru DM enablement kit v4.0.0 for HP.Now system is showing two devices which is as follows

/dev/mapper/mpath0
/dev/mapper/mpath1

However thanks for your help