- Create a Fibre Channel LUN on your NetApp and map it to your NexentaStor machine (I’m using version 3.0.2 in this example). For this example, I’ve created a 10GB LUN on a filer running ONTAP 7.2:
netapp01> lun show /vol/nexenta01/lun01/lun /vol/nexenta01/lun01/lun 10g (10737418240) (r/w, online, mapped)There are eight paths from our NetApp to our NexentaStor appliance, so the LUN appears eight times on the “qlc” adapter (lines 9-16 below):
nmc@nexenta01:/$ lunsync Cleanup obsolete (dangling) device links? Yes Re-enumerating LUNs... done. nmc@nexenta01:/$ show lun LUN ID Device Type Size Volume Mounted Attach GUID c0t0d0 sd0 disk 272.3GB syspool no mega_sas 60024e805102c100118a3fa70ae8937a c1t0d0 sd128 cdrom No Media no ata - c2t5*DDDd0 sd6 disk 10GB no qlc 60a98000486e542f5034577076716469 c2t5*DDDd0 sd4 disk 10GB no qlc 60a98000486e542f5034577076716469 c2t5*DDDd0 sd7 disk 10GB no qlc 60a98000486e542f5034577076716469 c2t5*DDDd0 sd5 disk 10GB no qlc 60a98000486e542f5034577076716469 c3t5*DDDd0 sd3 disk 10GB no qlc 60a98000486e542f5034577076716469 c3t5*DDDd0 sd2 disk 10GB no qlc 60a98000486e542f5034577076716469 c3t5*DDDd0 sd8 disk 10GB no qlc 60a98000486e542f5034577076716469 c3t5*DDDd0 sd1 disk 10GB no qlc 60a98000486e542f5034577076716469 syspo~/swap zvol 1.0GB syspool no
- In NexentaStor “expert” mode, enable MPxIO for your Fibre Channel HBA (schedule this for a maintenance window, as it requires a reboot):
root@nexenta01:/volumes# stmsboot -L stmsboot: MPXIO disabled root@nexenta01:/volumes# stmsboot -e -D fp WARNING: This operation will require a reboot. Do you want to continue ? [y/n] (default: y) updating //platform/i86pc/boot_archive updating //platform/i86pc/amd64/boot_archive The changes will come into effect after rebooting the system. Reboot the system now ? [y/n] (default: y)
Note that this will not have any immediately noticable effect after rebooting:
nmc@nexenta01:/$ lunsync Cleanup obsolete (dangling) device links? Yes Re-enumerating LUNs... done. nmc@nexenta01:/$ show lun LUN ID Device Type Size Volume Mounted Attach GUID c0t0d0 sd0 disk 272.3GB syspool no mega_sas 60024e805102c100118a3fa70ae8937a c1t0d0 sd128 cdrom No Media no ata - c2t5*DDDd0 sd6 disk 10GB no qlc 60a98000486e542f5034577076716469 c2t5*DDDd0 sd4 disk 10GB no qlc 60a98000486e542f5034577076716469 c2t5*DDDd0 sd7 disk 10GB no qlc 60a98000486e542f5034577076716469 c2t5*DDDd0 sd5 disk 10GB no qlc 60a98000486e542f5034577076716469 c3t5*DDDd0 sd3 disk 10GB no qlc 60a98000486e542f5034577076716469 c3t5*DDDd0 sd2 disk 10GB no qlc 60a98000486e542f5034577076716469 c3t5*DDDd0 sd8 disk 10GB no qlc 60a98000486e542f5034577076716469 c3t5*DDDd0 sd1 disk 10GB no qlc 60a98000486e542f5034577076716469 syspo~/swap zvol 1.0GB syspool no -
However, in expert mode, you will now see the following:
root@nexenta01:/volumes# stmsboot -L stmsboot: No STMS devices have been found
- Enable ALUA (Asymmetric Logical Unit Access) on the initiator group on the NetApp:
netapp01> igroup show -v nexenta01 nexenta01 (FCP): OS Type: solaris Member: 21:00:00:aa:bb:cc:dd:ee (logged in on: 0b, 0d, vtic) Member: 21:01:00:aa:bb:cc:dd:ee (logged in on: 0b, 0d, vtic) netapp01> igroup set nexenta01 alua yes netapp01> igroup show -v nexenta01 nexenta01 (FCP): OS Type: solaris Member: 21:00:00:aa:bb:cc:dd:ee (logged in on: 0b, 0d, vtic) Member: 21:01:00:aa:bb:cc:dd:ee(logged in on: 0b, 0d, vtic) ALUA: Yes - Reconfigure and re-scan your NexentaStor HBA; note that the LUN is now attached to “mpxio” where it was previously attached to “qlc”:
nmc@nexenta01:/$ lunsync -r Cleanup obsolete (dangling) device links? Yes Re-scanning HBAs... done. Re-enumerating LUNs... done. nmc@nexenta01:/$ show lun LUN ID Device Type Size Volume Mounted Attach GUID c0t0d0 sd0 disk 272.3GB syspool no mega_sas 60024e805102c100118a3fa70ae8937a c1t0d0 sd128 cdrom No Media no ata - c4t6*469d0 sd9 disk 10GB no mpxio 60a98000486e542f5034577076716469 syspo~/swap zvol 1.0GB syspool no -
In NexentaStor expert mode, note that
stmsbootnow shows devices:root@nexenta01:/volumes# stmsboot -L non-STMS device name STMS device name ------------------------------------------------------------------ /dev/rdsk/c3t500A09869657ADDDd0 /dev/rdsk/c4t60A98000486E542F5034577076716469d0 /dev/rdsk/c3t500A09889657ADDDd0 /dev/rdsk/c4t60A98000486E542F5034577076716469d0 /dev/rdsk/c3t500A09888657ADDDd0 /dev/rdsk/c4t60A98000486E542F5034577076716469d0 /dev/rdsk/c3t500A09868657ADDDd0 /dev/rdsk/c4t60A98000486E542F5034577076716469d0 /dev/rdsk/c2t500A09869657ADDDd0 /dev/rdsk/c4t60A98000486E542F5034577076716469d0 /dev/rdsk/c2t500A09889657ADDDd0 /dev/rdsk/c4t60A98000486E542F5034577076716469d0 /dev/rdsk/c2t500A09888657ADDDd0 /dev/rdsk/c4t60A98000486E542F5034577076716469d0 /dev/rdsk/c2t500A09868657ADDDd0 /dev/rdsk/c4t60A98000486E542F5034577076716469d0
You can now create a NexentaStor volume on your LUN.
Hat Tip to @complex on Twitter.
Reference: Is it possible to use I/O multipathing? How?
