Disk HW Paths

[Alan Casey]

I have a Clariion EMC 400 and a LUN attached to HP-UX 11.i

The hardware path to the disk was:
0/4/0/0.97.4.19.0.0.1

This has now changed to
0/4/0/0.97.4.19.0.0.2

And I'm unable to use it as the powerpath software holds the old address.

I have a call open with EMC about this, but was wondering if anyone knows what the last digit of the hardware path relates to?
Or if anyone has had a similar problem.

The path changed as I changed the default SP path to the SAN and then changed it back to the original.

[Patrick Wallek]

Well, with most arrays the last digit of the patch refers to the LUN on the array. EMC could very well be different though. Everything I've seen so far has the last digit, possibly the last 2 or 3 digits, representing the lun.

[Sanjay_6]

Hi Alan,

The last digit in the path normally refers to the lun id. it is surprising to see the lun id got changed this way unless it was reassigned using the sdr ( the emc disk relocator).

Hope this helps.

Regds

[Steven E. Protter]

It is possible to renumber instances of hardware within reason. /dev/dsk/c5t6d0 can be changed.

See this doc:
http://www1.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&admit=-682735245+1099407378919+28353475&docId=200000067424466


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