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Hdisks in AIX5.3 bootlist
Hello, consider this:
Pseudo name=hdiskpower1
Logical device ID=60060160DE5022001C6735F647BDE011 [LUN 315]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP B, current=SP A Array failover mode: 1
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
1 fscsi1 hdisk16 SP B1 active alive 0 0
3 fscsi3 hdisk17 SP B0 active alive 0 0
0 fscsi0 hdisk2 SP A0 active alive 0 0
2 fscsi2 hdisk5 SP A1 active alive 0 0
Pseudo name=hdiskpower0
Logical device ID=60060160DE502200D81B3AD647BDE011 [LUN 314]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A Array failover mode: 1
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
0 fscsi0 hdisk0 SP A0 active alive 0 0
2 fscsi2 hdisk1 SP A1 active alive 0 0
1 fscsi1 hdisk3 SP B1 active alive 0 0
3 fscsi3 hdisk6 SP B0 active alive 0 0
bootlist_-m_normal_-o.txt
hdisk0 blv=hd5
hdisk16
-----------------------------
Lun 314 and 315 are mirrored rootvg disks.....
So my question is, do I need to add ALL paths to AIX bootlist?, or which ones? and why? AIX team tells me I can only add 5, and i dont see anywhere in the bootlist documentation that specifies a number....
Any help would be appreciated!
dd_emc
26 Posts
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October 25th, 2011 16:00
If you are limited to 5 disks in the bootlist (sorry I don't know enough AIX to question this), then I would suggest something like LUN 314 by default sp (hdisk0), LUN 315 by default sp (hdisk16), LUN 314 by default sp but via an alternate fabric/hba (hdisk1), LUN 314 by non-default sp (hdisk3) then LUN 315 by non-default sp and via alternate fabric/hba (hdisk5). The idea is to add enough paths to protect against SP/switch and/or HBA failures.
A couple of other points/questions:
Brion2
154 Posts
0
October 26th, 2011 11:00
Hi. This is failovermode 1. With PP 5.3 SP1 and above for AIX, failover mode 4 should be used.
There is the verbos –v option in bootlist which tells you have reached the maximum number of devices allowed is 5.