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Alternate paths are not visible

Umamaheswara Reddy
Occasional Contributor

Alternate paths are not visible

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
9 REPLIES
Modris Bremze
Esteemed Contributor

Re: Alternate paths are not visible

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.
Torsten.
Acclaimed Contributor

Re: Alternate paths are not visible

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.

Hope this helps!
Regards
Torsten.

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Umamaheswara Reddy
Occasional Contributor

Re: Alternate paths are not visible

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.

Torsten.
Acclaimed Contributor

Re: Alternate paths are not visible

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

Hope this helps!
Regards
Torsten.

__________________________________________________
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those who understand binary, and those who don't.

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Umamaheswara Reddy
Occasional Contributor

Re: Alternate paths are not visible

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:(/) >

Torsten.
Acclaimed Contributor

Re: Alternate paths are not visible

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

Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

__________________________________________________
No support by private messages. Please ask the forum!

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Kapil Jha
Honored Contributor

Re: Alternate paths are not visible

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+
I am in this small bowl, I wane see the real world......
Duncan Edmonstone
Honored Contributor

Re: Alternate paths are not visible

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

HTH

Duncan
Chandrahasa s
Valued Contributor

Re: Alternate paths are not visible

Hi,
There may be issue with zoning.

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


Regards,
Chandra