error message in eva5000 2c2d for lun presentation.

[arunkumar.p]

I have eva 5000 with 2c2d configration . when i am presenting a lun to a host . it gives me a error in management events saying " no devices found on the controllers back end loop
'. And newly created luns are not shown in the host o.s.All the batteries in both the hsv110 have discharged .i HAVE ATTACHED THE screen shot of the error log.Need some tips

[Rob Leadbeater]

Hi,

I suspect you have more than one problem.

The error message shown in the picture suggests that things aren't cabled correctly.

How are things connected up ?

The fact that LUNs are not seen by the the host OS, will probably be down to the flat batteries. These will prevent the LUNs from being seen.

Hope this helps,

Regards,

Rob

[Víctor Cespón]

If the batteries on BOTH controllers have failed, the EVA suspends ALL presentations. This is explained on EVA manual. Only LUN 0 is active (that's the one used by Command View to talk to controllers).
You must request replacement batteries ASAP.

[Víctor Cespón]

I located the document:

HP StorageWorks Enterprise Virtual Array
3000/5000 service manual

Table 43: Effect of battery state on cache policy

Primary controller battery system bad &
Secondary controller battery system bad =
No disk presentation except Storage Array Controller Device (SACD)

The SACD, located at LUN0, is a special type of LUN defined by the SCSI-3 specification that serves as a portal to the
controller, similar in function to the old Command Console LUN (CCL).

[arunkumar.p]

well guys Thanks for your valuable Tips ,i am getting 2 sets of new hsv 110 battery pack.I hope these will resolve the issue.BUT if the battery fails ,will it present the lun0 to SMA SERVER.