scsimgr SCSI Management and Diagnostics utility on HP-UX 11i v3 (March 2008)

• Vendor specific active-passive devices with a plug-in module provided on HP-UX 11i v3.
Determining whether a device supports explicit asymmetric access
To determine if a device supports explicit asymmetric access, run the ‘scsimgr get_info’ on the
device. The following table indicates whether the ‘scsimgr activate’ command applies based
on the values of fields ‘LUN access type’ and ‘Asymmetric logical unit access supported’.
Value of field ‘LUN access
type’
Value of field ‘Asymmetric
logical unit access
supported’
‘scsimgr activate’
applicable?
‘No’ N/A No
(No asymmetric access support)
‘Vendor specified Active-
Passive’
N/A Yes
(If the plug-in supports the
function)
‘T10 Symmetric Active-Active’ N/A No
(All lunpaths are active and can
be used for I/O transfer)
‘T10 Asymmetric Active-Active’
‘T10 Asymmetric Active-Passive’
‘T10 Asymmetric Active-
Unavailable’
‘Implicit’ No
(The device changes the state
based on internal conditions)
‘T10 Asymmetric Active-Active’
‘T10 Asymmetric Active-Passive’
‘T10 Asymmetric Active-
Unavailable’
‘Explicit’
‘Both Explicit and Implicit’
Yes
The following output of ‘scsimgr get_info’ command shows that disk54 supports T10 explicit
and implicit ALUA standard, and disk1292 is a vendor specific active-passive disk device. Therefore
the ‘scsimgr activate’ command can be applied to both disk54 and disk1292.
# scsimgr get_info -D /dev/rdisk/disk54
STATUS INFORMATION FOR LUN : /dev/rdisk/disk54
Generic Status Information
SCSI services internal state = ONLINE
Device type = Direct_Access
EVPD page 0x83 description code = 1
EVPD page 0x83 description association = 0
EVPD page 0x83 description type = 3
World Wide Identifier (WWID) = 0x600508b300903330ec569c5839ab003c
Serial number = P56350GX3QH0BE
Vendor id = HP
Product id = MSA VOLUME
Product revision = 7.00
Other properties =
SPC protocol revision = 2
Open count (includes chr/blk/pass-thru/class) = 0
Raw open count (includes class/pass-thru) = 0
Pass-thru opens = 0
LUN path count = 4
Active LUN paths = 2
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