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11-09-2009 03:09 AM
11-09-2009 03:09 AM
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
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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11-09-2009 03:18 AM
11-09-2009 03:18 AM
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
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
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11-09-2009 03:20 AM
11-09-2009 03:20 AM
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
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
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11-10-2009 12:18 AM
11-10-2009 12:18 AM
Re: HPUX 11.31 I/O stack
I was informed that this forum is not the proper place for my question
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