topic HP-UX and EVA 5k cache battery fail in Operating System - HP-UX

HP-UX and EVA 5k cache battery fail

Andrey Chipalyuk — Thu, 25 Feb 2010 05:15:52 GMT

I have a HP-UX (11.23 and 11.31) servers configuartion with EVA 5k (HSV110, VCS 3.x).
When cache battery failed on an EVA controller, the Secure Path on HP-UX 11.23 move LUN paths to the alternate controller:

TGT/LUN Device WWLUN_ID H/W_Path #_Paths
1/ 5 c9t1d5 6005-08B4-0001-0B85-0001-7000-008B-0000 2
255/255/0/1.5
Controller Path_Instance HBA Preferred? Path_Status
P5849D4AAOP01R no
c7t1d6 td0 no Active

Controller Path_Instance HBA Preferred? Path_Status
P5849D4AAOP02N no
c8t1d6 td0 no ****FAILED

The configuartion of HP-UX 11.31 is supporting EVA 5k (active-passive arrays) by the load_bal_policy attribute is set to preferred_path:

# scsimgr get_attr -D /dev/rdisk/disk18 -a preferred_path -a load_bal_policy

name = preferred_path
current = 0/5/1/1.0x50001fe1500123dc.0x4001000000000000(lunpath19)

name = load_bal_policy
current = preferred_path

Though when cache battery failed, the HP-UX 11.31 not move LUN paths to the alternate controller and disk operation failed.
Have any idea how to repair this issue?

Re: HP-UX and EVA 5k cache battery fail

Torsten. — Thu, 25 Feb 2010 06:35:04 GMT

According to the matrix a/p arrays are not supported with 11.31:

http://docs.hp.com/en/9529/hpux_io_devices.htm

Re: HP-UX and EVA 5k cache battery fail

Andrey Chipalyuk — Thu, 25 Feb 2010 07:45:50 GMT

http://docs.hp.com/en/native-multi-pathing/native_multipathing_wp.pdf

HP-UX 11i v3 Native Multi-Pathing for Mass Storage

Active-Passive Device Support

Active-passive arrays are supported if any of the following conditions is true:
...
...
...
â ¢ The LUN or disk array is connected to a single host OS instance, the load_bal_policy attribute is set to preferred_path or pref_tport, and the array is in auto-trespass mode.

Re: HP-UX and EVA 5k cache battery fail

Torsten. — Thu, 25 Feb 2010 08:13:35 GMT

Check if you can find your configuration here:

http://h20272.www2.hp.com/index.aspx

Re: HP-UX and EVA 5k cache battery fail

Andrey Chipalyuk — Thu, 25 Feb 2010 08:39:12 GMT

Thank for link:

http://h20272.www2.hp.com/index.aspx

I see:

EVA 5000 v3 are supported Legacy PDF files!

What do it mean?