HP-UX 11.31 - Legacy special files of a LUN does not exists

[Marcelo Pablo Eguia]

Hi,

I've just added a LUN from a Symmetrix DMX to an HPUX 11iv3 host. I see the corresponding persistent DSF but I can't see the legacy DSF. The previously added disks, have the persistent and legacy DSFs.

rx3 # ioscan -m dsf
Persistent DSF Legacy DSF(s)
========================================
/dev/rdisk/disk3 /dev/rdsk/c0t0d0
/dev/rdisk/disk3_p1 /dev/rdsk/c0t0d0s1
/dev/rdisk/disk3_p2 /dev/rdsk/c0t0d0s2
/dev/rdisk/disk3_p3 /dev/rdsk/c0t0d0s3
/dev/rdisk/disk13 /dev/rdsk/c1t0d2
/dev/rdsk/c2t0d2
/dev/rdisk/disk16 /dev/rdsk/c2t0d0
/dev/rdsk/c1t0d0
/dev/rdisk/disk17 /dev/rdsk/c1t0d1
/dev/rdsk/c2t0d1
/dev/rdisk/disk17_p1 /dev/rdsk/c1t0d1s1
/dev/rdsk/c2t0d1s1
/dev/rdisk/disk17_p2 /dev/rdsk/c1t0d1s2
/dev/rdsk/c2t0d1s2
/dev/rdisk/disk17_p3 /dev/rdsk/c1t0d1s3
/dev/rdsk/c2t0d1s3
/dev/rdisk/disk19 /dev/rdsk/c1t0d3
/dev/rdsk/c2t0d3
/dev/rdisk/disk22 /dev/rdsk/c1t0d4
/dev/rdsk/c2t0d4
/dev/rdisk/disk25 /dev/rdsk/c1t0d5
/dev/rdsk/c2t0d5
/dev/rdisk/disk26 /dev/rdsk/c1t0d6
/dev/rdsk/c2t0d6


rx3 # ioscan -fnNkC disk
Class I H/W Path Driver S/W State H/W Type Description
===========================================================================
:
:

disk 27 64000/0xfa00/0x13 esdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/disk/disk27 /dev/rdisk/disk27

Why disk27 does not appear en the "ioscan -m dsf" command output ?.

The scsimgr command show me that disk27 have two paths, like the other disks.


Thanks !
Marcelo.

[Michael Leu]

Hi,

What does "ioscan -m hwpath" and a "ioscan -fnNkH" of each hwpath say?

[kevin_m]

Try running 'ioscan -fnNC disk' and 'insf' just in case. If it still doesn't show up, is it possible that LUN was presented to the server in the past?

- Kevin

[Marcelo Pablo Eguia]

Hi Michael,

I've attached the "ioscan" output.


Thanks !
Marcelo.

[Marcelo Pablo Eguia]

Hi Kevin,

I did the "ioscan" and "insf" and the problem persist. That LUN was not presented in the past.

Thanks,
Marcelo.

[Torsten.]

Does a "normal" ioscan -fn list them?
Maybe they are disabled?

[Michael Leu]

Can you check syslog if it has messages like "inquiry page 83h/80h failed or the current page 83h/80h data do not match the previous known page 83h/80h data"?

Because if you previously had another disk presented at LUN 30 (0x1e) with a different WWID, then HP-UX 11.31 will want a "scsimgr replace_wwid" before allowing it to be accessed.

[Michael Leu]

Sorry, forgot:
# scsimgr get_info -H64000/0xfa00/0x13
would be interesting...

[Marcelo Pablo Eguia]

Hi Torsten,

The normal "ioscan" shows the others disks correctly but did not show anything about the "disk27". When I execute "ioscan" with the "-N" option, "disk27" is listed. Without the "-N" I can't see it.

rx3 # insf -L -v
insf: Legacy mode is enabled

Regards,
Marcelo.

[kevin_m]

Any reason you need to use legacy mode? Addressing the LUN as disk27 will gain the benefit of native multipathing, better performance, etc.