EVA 3K, HPuX and missing LUNS

[Marius Pana_1]

Hi all,

After an unfortunate overheating and sudden power outage of all equipment we are left with an EVA3k system that apparently has lost both cache batteries and our servers no longer see any of the LUNS presented.

We have verified all servers (hpux and one windows management server). We have configured all zoning on the switches, tried direct connections (controller => HBA) and still the servers see no LUNS.

What is strange is that the windows management server communicates in-band and is able to communicate with the controllers. The only errors we can see are in command view eva and they are about the batteries that are both defect.

On hpux running an ioscan produces the output attached and what is strange is that some communication seems to happen between the servers and eva but no luns are visible.

Could someone tell me what the rscsi devices are? They seem to be from EVA but have no idea what to do with them.

Any help would be greatly appreciated.

Regards,
Marius

[sreekanthtm · Accepted solution]

Hi,

Hope you are in a big trouble :(

>>After an unfortunate overheating and sudden power outage of all equipment we are left with an EVA3k system that apparently has lost both cache batteries and our servers no longer see any of the LUNS presented. --> This can leads to the vdisk corruption. You have to check the vdisk status in Command view EVA. You have to click on vdisk even if there is no yellow exclamation mark. Once you clicked, it will show all the details, Check the presentation details. If the vdisk is corrupted, then you have to recreate ( All data would be loss).

>> While powering up the fabric, you have to switch on the SAN switches first, Once SAN switches finished the booting process and came up, you can power ON the Storage device (EVA), Finally Servers. If you didn't follow this procedure, It can leads to misbehavior in the fabric.

Rgds
Sreekanth

[sreekanthtm]

One more doubt....
Are you facing problem with all your servers? Or only with one HPUX box?

Rgds
Sreekanth

[Marius Pana_1]

Hello Sreekanth,

The vdisks seem to be fine. The san switches are also OK. We have even changed the san switches at one point as we thought they were faulty.

I read somewhere on this forum that without cache batteries, EVA wont present the LUNS. Can anyone confirm this behavior as this could be easily solved with new batteries.

Regards,
Marius

[Marius Pana_1]

The problem is for all servers. We tried windows and hpux but the symptoms are the same. There is connectivity for management purposes but no LUNS are visible.

[sreekanthtm]

Oh!!
I didn't noticed that, If both cache batteries are down, then EVA won't function.
You have to replace the cache bateries first in order to bring them up.

Rgds
Sreekanth

[Marius Pana_1]

Thanks! I have ordered new batteries and this will hopefully resolve our problems!