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Lun number greater than 128 for hpux 11iv2

 
Respected Contributor

Lun number greater than 128 for hpux 11iv2

Hi ,

 

We had no problems whenwe awere assigning lun number till 127 , when mapping with host in 11iv2.

Butas soon as w touched 128 , we found that we are getting 8 paths instead of usual 4.

 

why is it so ??

 

for ex:

if lun no is 129 , we are getting 

root #/ >ioscan -fnC disk|grep t0d0
/dev/dsk/c33t0d0 /dev/rdsk/c33t0d0
/dev/dsk/c40t0d0 /dev/rdsk/c40t0d0
/dev/dsk/c39t0d0 /dev/rdsk/c39t0d0
/dev/dsk/c41t0d0 /dev/rdsk/c41t0d0
/dev/dsk/c32t0d0 /dev/rdsk/c32t0d0
/dev/dsk/c42t0d0 /dev/rdsk/c42t0d0
/dev/dsk/c38t0d0 /dev/rdsk/c38t0d0
/dev/dsk/c43t0d0 /dev/rdsk/c43t0d0

 

instead of earlier one prior to 128 :

/dev/dsk/c33t15d0
/dev/dsk/c39t15d0
/dev/dsk/c32t15d0
/dev/dsk/c38t15d0

 

Someboldy please clear it for me .

1 REPLY 1
Acclaimed Contributor

Re: Lun number greater than 128 for hpux 11iv2

You don't have 8 pathes per device, but 4 new devices on new controller instances:

c40
c41
c42
c43

Look at the hardware path, you should see the encoded LUN number there.

 

Example:

 

x/x/x.y.y.y.0.0.1  = LUN 1

x/x/x.y.y.y.0.15.7 = LUN 127

x/x/x.y.y.y.1.0.0  = LUN 128

x/x/x.y.y.y.1.0.1  = LUN 129

 

 

See the difference:

 

LUN 1     ... 0.0.1

LUN129 ...1.0.1

 

both will by c__t0d0, but a different c__


Hope this helps!
Regards
Torsten.

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