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Re: HPUX 11.31 I/O stack

 
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New Member

HPUX 11.31 I/O stack

Hi Everybody,

I have an issue with my Customer.
He is using EMC array to present luns to server. This array is not providing WWID (see below output)
#scsimgr get_info -D /dev/rdisk/disk260 all_lpt



STATUS INFORMATION FOR LUN PATH : lunpath118



Generic Status Information



SCSI services internal state = UNOPEN

Open close state = ACTIVE

Protocol = fibre_channel

EVPD page 0x83 description code = 0

EVPD page 0x83 description association = 0

EVPD page 0x83 description type = 0

World Wide Identifier (WWID) = N/A

Total number of Outstanding I/Os = 0

Maximum I/O timeout in seconds = 30

Maximum I/O size allowed = 2097152

Maximum number of active I/Os allowed = 8

Maximum queue depth = 8

Queue full delay count = 0

Asymmetric state = NA

Device preferred path = No

Relative target port identifier = NA

Target port group identifier = NA

#scsimgr get_info -D /dev/rdisk/disk118 all_lpt



STATUS INFORMATION FOR LUN PATH : lunpath46



Generic Status Information



SCSI services internal state = UNOPEN

Open close state = ACTIVE

Protocol = fibre_channel

EVPD page 0x83 description code = 0

EVPD page 0x83 description association = 0

EVPD page 0x83 description type = 0

World Wide Identifier (WWID) = N/A

Total number of Outstanding I/Os = 0

Maximum I/O timeout in seconds = 30

Maximum I/O size allowed = 2097152

Maximum number of active I/Os allowed = 8

Maximum queue depth = 8

Queue full delay count = 0

Asymmetric state = NA

Device preferred path = No

Relative target port identifier = NA

Target port group identifier = NA

In fact both are paths to one lun but HPUX created two different device files.

I have two questions for that:
Q1. is it allowed to modify WWID with command "scsimgr save_attr" ?

Q2. if answer to Q1 is yes, would this change trigger I/O stack to see those devices as two paths to one device ?

I will realy appreciate any advice/suggestion/recommendation.

Zbigniew
3 REPLIES 3
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Re: HPUX 11.31 I/O stack

Presumably this is a Symmetrix/DMX?

This is down to director bit settings on the EMC ports - the settings are different for 11iv3 vs. 11iv1 or 11iv2 - last time I looked you needed the following set:

Common Serial Number (C)
Enable Volume Set Addressing (V)
Host SCSI Compliance 2007 (OS2007)
SCSIâ 3 SPCâ 2 Compliance (SPCâ 2)
Unique World Wide Name (UWN)

Chek the latest EMC HP-UX connectivity guide for details (or have your storage folks do this)

HTH

Duncan

I am an HPE Employee
Accept or Kudo
Highlighted

Re: HPUX 11.31 I/O stack

obviously that list should read:

Common Serial Number (C)
Enable Volume Set Addressing (V)
Host SCSI Compliance 2007 (OS2007)
SCSI-3 SPC-2 Compliance (SPC-2)
Unique World Wide Name (UWN)


HTH

Duncan

I am an HPE Employee
Accept or Kudo
New Member

Re: HPUX 11.31 I/O stack

I was informed that this forum is not the proper place for my question