Hi,
I've noticed that mpathadm states that one of our luns has no active paths:
/dev/rdsk/c6t60000970000298700009533031324333d0s2
Total Path Count: 4
Operational Path Count: 4
/dev/rdsk/c6t60000970000298700009533031333037d0s2
Total Path Count: 4
Operational Path Count: 0
/dev/rdsk/c6t60000970000298700009533031324634d0s2
Total Path Count: 4
Operational Path Count: 4
The same lun shows up in iostat:
c6t60000970000298700009533031333037d0 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: EMC Product: SYMMETRIX Revision: 5874 Serial No:
Size: 103.08GB <103080591360 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 2 Predictive Failure Analysis: 0
And is mirror in a zpool:
pool: export
state: ONLINE
scrub: resilver completed after 0h2m with 0 errors on Wed Oct 30 14:42:42 2013
config:
NAME STATE READ WRITE CKSUM
export ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
c6t6001438002A57F6C0000800009B60000d0 ONLINE 0 0 0
c6t60000970000298700009533031333037d0 ONLINE 0 0 0 36.4G resilvered
If the lun had no active paths, surely zfs would have complained? I only just added this lun to the zpool recently too. Is this a reporting anomoly - or deeper issue here?
root@server02 # mpathadm show lu /dev/rdsk/c6t60000970000298700009533031333037d0s2
Logical Unit: /dev/rdsk/c6t60000970000298700009533031333037d0s2
mpath-support: libmpscsi_vhci.so
Vendor: EMC
Product: SYMMETRIX
Revision: 5874
Name Type: unknown type
Name: 60000970000298700009533031333037
Asymmetric: no
Current Load Balance: round-robin
Logical Unit Group ID: NA
Auto Failback: on
Auto Probing: NA
Paths:
Initiator Port Name: 10000000c978d125
Target Port Name: 50000975f0002581
Override Path: NA
Path State: unavailable
Disabled: no
Initiator Port Name: 10000000c978d0c3
Target Port Name: 50000975f0002589
Override Path: NA
Path State: unavailable
Disabled: no
Initiator Port Name: 10000000c978d0c3
Target Port Name: 50000975f0002585
Override Path: NA
Path State: unavailable
Disabled: no
Initiator Port Name: 10000000c978d125
Target Port Name: 50000975f000258d
Override Path: NA
Path State: unavailable
Disabled: no
Target Ports:
Name: 50000975f0002585
Relative ID: 0
Name: 50000975f0002589
Relative ID: 0
Name: 50000975f0002581
Relative ID: 0
Name: 50000975f000258d
Relative ID: 0
---------- Post updated at 04:03 AM ---------- Previous update was at 03:28 AM ----------
the plot thickens, after checking messages, I found the following. And the lun paths are offline/onlining constantly.
WARNING: kstat_create('mdi', 0, 'ssd301.t4.fp1'): namespace collisi
on
Oct 30 14:35:39 ldn-ux-kon02 genunix: [ID 834635 kern.info] /scsi_vhci/ssd@g60000970000298700009533031333037 (ssd301) multipath
status: optimal, path /pci@3,700000/SUNW,emlxs@0,1/fp@0,0 (fp1) to target address: w50000975f0002585,4 is online Load balancin
g: round-robin
googling does not reaveal much. I'll see if I can log a case with Oracle.