topic Re: Alternate paths are not visible in Operating System - HP-UX

Alternate paths are not visible

Umamaheswara Reddy — Thu, 11 Mar 2010 12:08:06 GMT

Hi There,
Today I have assigned new LUNs on SAN storage to our HP-UX server with 11i V3.But when I run the ioscan -m dsf, the alternate paths are not visible to the newly assigned disks.Please help me with this.

In the below output,disk34 to disk42 are newly assigned ones.

root.uxblrh05:(/) >ioscan -m dsf
Persistent DSF Legacy DSF(s)
========================================
/dev/pt/pt3 /dev/rscsi/c2t0d0
/dev/rdisk/disk3 /dev/rdsk/c1t0d0
/dev/rdisk/disk3_p1 /dev/rdsk/c1t0d0s1
/dev/rdisk/disk3_p2 /dev/rdsk/c1t0d0s2
/dev/rdisk/disk3_p3 /dev/rdsk/c1t0d0s3
/dev/pt/pt5 /dev/rscsi/c4t0d0
/dev/rdisk/disk11 /dev/rdsk/c5t0d0
/dev/rdsk/c3t0d0
/dev/rdisk/disk12 /dev/rdsk/c5t1d4
/dev/rdsk/c3t1d4
/dev/rdisk/disk13 /dev/rdsk/c5t1d5
/dev/rdsk/c3t1d5
/dev/rdisk/disk14 /dev/rdsk/c5t1d6
/dev/rdsk/c3t1d6
/dev/rdisk/disk15 /dev/rdsk/c5t1d7
/dev/rdsk/c3t1d7
/dev/rdisk/disk16 /dev/rdsk/c5t2d0
/dev/rdsk/c3t2d0
/dev/rdisk/disk17 /dev/rdsk/c5t15d1
/dev/rdsk/c3t15d1
/dev/rdisk/disk34 /dev/rdsk/c3t3d1
/dev/rdisk/disk35 /dev/rdsk/c3t3d2
/dev/rdisk/disk36 /dev/rdsk/c3t3d3
/dev/rdisk/disk37 /dev/rdsk/c3t3d4
/dev/rdisk/disk38 /dev/rdsk/c3t3d5
/dev/rdisk/disk39 /dev/rdsk/c3t3d6
/dev/rdisk/disk40 /dev/rdsk/c3t3d7
/dev/rdisk/disk41 /dev/rdsk/c3t4d0
/dev/rdisk/disk42 /dev/rdsk/c3t4d1

Re: Alternate paths are not visible

Modris Bremze — Thu, 11 Mar 2010 12:28:50 GMT

If you are connected to SAN via multiple FC interfaces, all of their WWNs should be specified when assigning disks. Looks like you only specified one of them. Just poking around in the dark, so maybe a more detailed information on your setup and `ioscan -kfnC disk` would be more helpful if this has nothing to do with your case.

Re: Alternate paths are not visible

Torsten. — Thu, 11 Mar 2010 12:38:03 GMT

Not sure what array you have, but maybe the device files are still not there yet (insf?) or the LUN is not visible over this path.

Re: Alternate paths are not visible

Umamaheswara Reddy — Thu, 11 Mar 2010 12:44:55 GMT

Hi,
I have assigned the LUNs to the both HBAs using I SAN administration GUI and I am able to view them in SAN administration GUI.I am attaching the ioscan output as well.

Re: Alternate paths are not visible

Torsten. — Thu, 11 Mar 2010 12:49:37 GMT

If not in ioscan, the server cannot see them (for whatever reason). Double check the "presentation" settings.

Re: Alternate paths are not visible

Umamaheswara Reddy — Thu, 11 Mar 2010 12:56:22 GMT

I am not getting any output when I run insf command.Can this be the reason for not being able to view the alternate paths?.

root.uxblrh05:(/) >insf -C disk
root.uxblrh05:(/) >

Re: Alternate paths are not visible

Torsten. — Thu, 11 Mar 2010 13:05:29 GMT

insf will create special device files for **visible** devices in that case; no device - no device file!

Re: Alternate paths are not visible

Kapil Jha — Thu, 11 Mar 2010 14:39:56 GMT

u can try from scratch
check storage thing then
#ioscan -fn
#insf -e

then check, one more thing ur quesion says u not able to see alternate path, are you able to see one disk.

BR,
Kapil+

Re: Alternate paths are not visible

Duncan Edmonstone — Thu, 11 Mar 2010 15:08:10 GMT

I notice these new LUNs appear to be on a different port - have you checked the director bits set on the symmm port to make sure they match those LUNs already presented (IIRC you need to set the SPC2 and OS2007 bits for 11iv3)

HTH

Duncan

Re: Alternate paths are not visible

Chandrahasa s — Fri, 12 Mar 2010 05:58:58 GMT

Hi,
There may be issue with zoning.

Provide "syminq" and "powermt display all" out put

Regards,
Chandra