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I/O transfer Statistics:
Bytes read
Bytes written
Total I/Os processed
Asynchronous IO read failures
Asynchronous IO write failures
i.
In HP-UX 1 1i v3, a device WWN (HP 3PAR Storage System VV) is closely tied to its
exported LUN ID (HP 3PAR Storage System VLUN). When seeing a different device WWN
(HP 3PAR Storage System VV) on a previously used LUN ID (VLUN) to prevent data
corruption, the host puts the LUN into an authentication failure state where the LUN path
cannot be used for I/O transfer. This state causes the host to log a message in
/var/adm/syslog/syslog.log and on the console to alert the user. The user should
rely on these messages and should apply the recommended corrective action, which
usually consists of running the scsimgr replace_wwid command.
NOTE:
used in earlier HP-UX releases.
Example: issuing showremovevlun and createvlun shows that the HP 3PAR Storage
System volume oracle1 is exported as LUN 6 and seen as /dev/rdisk/disk22 on the
host.
# showvv -d
590
Tue Oct
30 19:31:59 PDT 2007
591
Tue Oct
30 19:32:01 PDT 2007
# showvlun -a
Lun VVname
6
6
On the host, the following ioscan commands show that the host recognizes the VV.
# ioscan -kfnNC disk
Class I H/W Path Driver S/W State H/W Type Description
===================================================================
disk 22 64000/0xfa00/0x244 esdisk CLAIMED DEVICE 3PARdataVV
# ioscan -kfnNC lunpath
Class I H/W Path Driver S/W State H/W Type Description
==================================================================
....
lunpath 19 0/0/4/1/0.0x20420002ac000036.0x4006000000000000 eslpt CLAIMED
LUN_PATH LUN path for disk22
lunpath 20 0/0/4/1/1.0x21520002ac000036.0x4006000000000000 eslpt CLAIMED
LUN_PATH LUN path for disk22
# scsimgr get_attr -D /dev/rdisk/disk22
...
current = 0x50002ac0024e0036 --> Oracle1
28
Allocating Storage for Access by the HP-UX Host
scsimgr replace_wwid replaced the fcmsutil replace_dsk option
oracle1 RW 0/1/-
oracle2 RW 1/0/-
Host
oracle1
sqahpit2
oracle1
sqahpit2
/dev/disk/disk22 /dev/rdisk/disk22
---
---
---
---
---
---
---
---
-Host_WWN/iSCSI_Name-
50060B000068D5A4
50060B00001D1192
= 22816
= 912
= 512
= 0
= 0
- 50002AC0024E0036
- 50002AC0024F0036
Port
Type
0:4:2 host
1:5:2 host
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