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In the LUN path the 16 bits address following the target port ID
(0x20420002ac000036) represents the LUN number where the device is seen and
the addressing mode. For example, for 0x4001 (which translates to
0100000000000001) the first two bits 01 represents VSA mode and the remaining
14 bits represent the LUN number, which is LUN 1 in this example.
The host uses estp driver for target paths, eslpt for LUN paths and esdisk as
disk driver.
5)
You can find the health of a device, target, LUN path and determine whether it is
on or off line using the -P option. The -C option can be used to specify attributes
such as target ports, disks, or individual LUN paths. The status limited means some
paths are taken offline from the available multiple paths
# ioscan -P health -C tgtpath
Class
====================================
tgtpath
tgtpath
tgtpath
#ioscan -P health -C disk
Class
===============================
disk
disk
disk
disk
disk
# ioscan -P health -C lunpath
lunpath
lunpath
lunpath
lunpath
lunpath
lunpath
5.
A given DSF file (/dev/disk/diskXX) once allocated to a given unique device (HP 3PAR
Storage System VV) remains persistent and will not be reused for any other devices (VVs) even
after the original device (VV) is removed. Whenever the actual or original VV reappears, the
same DSF name is allocated.
Example:
Issuing showvlun -a on the HP 3PAR Storage System shows that the HP 3PAR Storage
System VV hpcheck is exported as LUN 20.
# showvlun -a
Lun VVname
20 hpcheck
20 hpcheck
0/0/4/1/0.0x20420002ac000036.0x4002000000000000
0/0/4/1/1.0x21520002ac000036.0x4002000000000000
I
H/W Path
2
0/0/0/3/0.0x6
0
0/0/4/1/0.0x20420002ac000036
1
0/0/4/1/1.0x21520002ac000036
I
H/W Path
health
2
64000/0xfa00/0x0
0
64000/0xfa00/0x23e
1
64000/0xfa00/0x23f
3
64000/0xfa00/0x240
4
64000/0xfa00/0x241
0
0/0/4/1/0.0x20420002ac000036.0x0
4
0/0/4/1/0.0x20420002ac000036.0x4001000000000000
5
0/0/4/1/0.0x20420002ac000036.0x4002000000000000
1
0/0/4/1/1.0x21520002ac000036.0x0
2
0/0/4/1/1.0x21520002ac000036.0x4001000000000000
9
0/0/4/1/1.0x21520002ac000036.0x4002000000000000
Host
-Host_WWN/iSCSI_Name-
sqahpit2 50060B00001D1192
sqahpit2 50060B000068D5A4
health
online
online
offline
online
online
online
limited
limited
Port Type
1:5:2 host
0:4:2 host
Setting Up Multipathing Software on 1 1i v3
online
online
online
offline
offline
offline
23
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