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XP12000 - How to avoid Zero-Size LUNs ?

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Alzhy
Honored Contributor

XP12000 - How to avoid Zero-Size LUNs ?

While Igniting and even querying HP-UX machnes connected to recently expanded XP12000 systems - I started to notice zero length HP_DISK-SUBSYSTEM) LUNS. I recall a setting somewhere in CommandView to avoid this -- does any one remember?


* Querying disk device: 1/0/2/1/0/4/0.4.3.0.7.12.0 ... * Disk at 1/0/2/1/0/4/0.4.3.0.7.12.0 (HP_DISK-SUBSYSTEM) reported a size of zero


from Iosacan:
DISK-SUBSYSTEM
/dev/dsk/c8t7d0 /dev/rdsk/c8t7d0
disk 16 0/0/14/1/0/4/0.2.23.0.0.8.0 sdisk CLAIMED DEVICE HP
DISK-SUBSYSTEM
/dev/dsk/c8t8d0 /dev/rdsk/c8t8d0
disk 17 0/0/14/1/0/4/0.2.23.0.0.9.0 sdisk CLAIMED DEVICE HP
DISK-SUBSYSTEM
/dev/dsk/c8t9d0 /dev/rdsk/c8t9d0
disk 18 0/0/14/1/0/4/0.2.23.0.0.10.0 sdisk CLAIMED DEVICE HP
DISK-SUBSYSTEM

as examples...



Hakuna Matata.
3 REPLIES
krusty
Honored Contributor
Solution

Re: XP12000 - How to avoid Zero-Size LUNs ?

Hi Nelson,

You'll need to modify the Host Group - Set the option to "12" to eliminate the "Ghost LUNs"

You'll need to reboot to get rid of the old device files, tho.

Cheers,

Curt

"In Vino Veritas"
Alzhy
Honored Contributor

Re: XP12000 - How to avoid Zero-Size LUNs ?

Hmmm... so instead of HP-UX to sometihng else?
Hakuna Matata.
krusty
Honored Contributor

Re: XP12000 - How to avoid Zero-Size LUNs ?

Hi Nelson,

Not the host mode itself - it's still mode "08". But if you right click on the host group, click on "change host group". Next Click on the "Options" button and you will see mode 12 "Undisplay function a ghost LUN". Select it and thats' it!. Obviously, you'll need to do it on both ports. Then do another ioscan, and they will be gone. A reboot will clear out the "No H/W" on the old device files.

Curt

"In Vino Veritas"