MSA Storage
cancel
Showing results for 
Search instead for 
Did you mean: 

hardware_handler parameter of MSA2040 at RHEL 7.4

 
jclee
Occasional Contributor

hardware_handler parameter of MSA2040 at RHEL 7.4


There was a path problem with RHEL 7.4 on server superdome x:

Jul 26 02:47:49 ictasstgdb01 kernel: sd 0:0:0:0: alua: Detached
Jul 26 02:47:49 ictasstgdb01 kernel: sd 0:0:0:0: [sda] Synchronizing SCSI cache
Jul 26 02:47:49 ictasstgdb01 kernel: sd 0:0:0:0: [sda] Synchronize Cache(10) failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
Jul 26 02:47:49 ictasstgdb01 multipathd: sda: remove path (uevent)

So Linux engineer recommended customer needs to change from hardware_handler "0" to hardware_handler "1 alua" :

# cat /etc/multipath.conf
defaults {
        find_multipaths yes
        user_friendly_names yes
}
devices {
        device{
                                vendor "HP"
                                product "MSA 2040 SAN"
                                path_grouping_policy group_by_prio
                                path_selector "round-robin 0"
                                path_checker tur
                                hardware_handler "0"   -> hardware_handler "1 alua"
                                failback immediate
                                rr_weight uniform
                                rr_min_io_rq 1
                                no_path_retry 3

I tried to find document related with that but I can't.
Can we change the parameter as linux engineer said ?

2 REPLIES 2

Re: hardware_handler parameter of MSA2040 at RHEL 7.4

The document you look for is called "Native Linux Device-Mapper Multipath for HPE Storage Arrays reference Guide",

https://hp--c.na86.content.force.com/servlet/servlet.FileDownload?file=00P1V00000cjcqe

 

 

Hope this helps!
Regards
Subhajit

If you feel this was helpful please click the KUDOS! thumb below!

***********************************************************************************

Re: hardware_handler parameter of MSA2040 at RHEL 7.4

@jclee.........if you are satisfied with the answers then kindly mark it as Solution so that others who are following this forum can get the Solution as well.

 

Hope this helps!
Regards
Subhajit

If you feel this was helpful please click the KUDOS! thumb below!

***********************************************************************************