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Hello, I have few questions regarding how zfs handles power path devices during reconfigure/DR situation on Solaris 11.3. Unfortunately, I could not get any information from the manual
I am in the process of creating a zfs pool using powerpath devices. Here are the questions.
1. What happens when powrepath is reconfigured and new name is allocated to the device that I used to create the pool. Would zfs recognize the new device and reconfigure the zfs pool?
2. LUNs on the server gets replicated to DR during DR test/situation. Would I be able to import ZFS pool on the DR server as and when replicated LUNs are presented to the target server.
Any input on above is much appreciated
To answer your 2nd question:
Please see the section on migrating storage pools at Migrating ZFS Storage Pools - Oracle Solaris Administration: ZFS File Systems
unixian
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Posted August 15th, 2017 18:00
G'day. In answer to your 1st question:
Here is the audit of my session:
billy-the-kid# ls -l /dev/dsk/emcpower525a
lrwxrwxrwx 1 root root 35 Feb 2 2017 /dev/dsk/emcpower525a -> ../../devices/pseudo/emcp@525:a,blk
billy-the-kid# zpool create tank emcpower525a emcpower526a
billy-the-kid#
billy-the-kid# zpool list tank
NAME SIZE USED AVAIL CAP HEALTH ALTROOT
tank 1.12G 89K 1.12G 0% ONLINE -
billy-the-kid# zpool status tank
pool: tank
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
emcpower525a ONLINE 0 0 0
emcpower526a ONLINE 0 0 0
errors: No known data errors
From powermt ; policy=SymmOpt; queued-IOs=0
==============================================================================
--------------- Host --------------- - Stor - -- I/O Path -- -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
3072 pci@1f,4000/lpfc@2/fp@0,0 c1t5000097208131D60d19s0 FA 9f:00 active alive 0 0
3074 pci@1f,4000/lpfc@4/fp@0,0 c2t5000097208131D68d19s0 FA 11f:00 active alive 0 0
billy-the-kid# emcpadm renamepseudo -s emcpower525a -t emcpower527a<<===
billy-the-kid# zpool export tank
billy-the-kid# emcpadm renamepseudo -s emcpower525a -t emcpower527a<<---
billy-the-kid# powermt display dev=emcpower527a
Pseudo name=emcpower527a
Symmetrix ID=000192601223
Logical device ID=2D0E
Device WWN=60000970000192601223533032443045
state=alive; policy=SymmOpt; queued-IOs=0
==============================================================================
--------------- Host --------------- - Stor - -- I/O Path -- -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
3072 pci@1f,4000/lpfc@2/fp@0,0 c1t5000097208131D60d19s0 FA 9f:00 active alive 0 0
3074 pci@1f,4000/lpfc@4/fp@0,0 c2t5000097208131D68d19s0 FA 11f:00 active alive 0 0
billy-the-kid# zpool import tank
billy-the-kid# zpool status tank
pool: tank
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
emcpower527a ONLINE 0 0 0
emcpower526a ONLINE 0 0 0
errors: No known data errors