topic Re: HP EVA8100 Loop Connection Lost in Disk Enclosures

HP EVA8100 Loop Connection Lost

kamel_88 — Tue, 02 Oct 2012 12:01:16 GMT

Hi All,

There is an issue occuring lately on the HP EVA8100, as it's giving attention on 10 Disk Enclosures.

The EVA consists of 2 Racks of 17 Disk Enclosures. There is attention status appearing on some of the Disk Enclosures in the Hardware part as shown:

All the disks, inside each of the enclosure giving attention, are stating One loop connection lost as shown in the picture:

I checked the hardware connectivity from the back, the loop switches & the IO modules (A & B) & all are giving fine & blinking green. The EVA controller HSV 210 is running firmware 6.25 which I think it's the latest & the disks are up- to-date as well with a faulty disk stating inacessable.

Can anybody assist?

Re: HP EVA8100 Loop Connection Lost

giladzzz — Tue, 02 Oct 2012 17:23:43 GMT

It seems you have on loop down on one of the 2 top loop switches it could be because of the disk that is inaccessible

that has the whole loop down try taking it out it's not working anyway

did this configuration work before ???

Regards

Re: HP EVA8100 Loop Connection Lost

kamel_88 — Wed, 03 Oct 2012 18:23:28 GMT

Hi giladzzz,

The configuration was working fine before.

Shouldn't the 2 down switches be responsible for Disk Enclosures 1->6 & 16 ->19. The EVA is almost full with disks.

Could it be because there is not too more space left?

Re: HP EVA8100 Loop Connection Lost

giladzzz — Wed, 03 Oct 2012 21:08:17 GMT

According to the picture you sent you have a hardware problem where one loop is down I enclose a EVA configuration document. Also you said one disk was marked inaccessible did you take it out ??

Regards

Re: HP EVA8100 Loop Connection Lost

kamel_88 — Mon, 08 Oct 2012 10:55:45 GMT

I couldn't take the risk of removing the inaccessable disk because the data is online.

It looks that the loop switch connection for the disk is good, even the disk has no prediction failure, but still some of the disks are giving attention.

Regards.

Re: HP EVA8100 Loop Connection Lost

giladzzz — Mon, 08 Oct 2012 19:49:45 GMT

According to what you sent the disk is failed.

If you have a service contract you must open a call with HP.

You have a problem with your EVA and you must fix it.

If you know which loop switch is not working you could disconnect it from power and reconnect.

But if your not sure you need a qualified service engineer.

Regards

Re: HP EVA8100 Loop Connection Lost

kamel_88 — Mon, 08 Oct 2012 22:00:06 GMT

According to the information found on the EVA Disk Placement document u gave, it shows that the last 3 disk bays of enclosures 16, 17, 19 & 20 should be empty.

In my case, most of these bays are not empty & the disk have been grouped in Disk Groups & were presented as luns.

It looks difficult to ungroup these disks & remove since data has been allocated.

I could disconnect a loop switch from power & put it back, but the the disks giving attention show the loop A & B as Good.

It's becoming confusing.

Regards,

Re: HP EVA8100 Loop Connection Lost

giladzzz — Wed, 10 Oct 2012 08:32:56 GMT

If you have empty disk slots you can ungroup a disk move it to a new location and then group it back.

You have not said why you are not calling HP support because you have a problem that needs taking care of.

If you want help with configuration I am enclosing a file follow the instructions inside and send the output maybe I can help.

Regards

Re: HP EVA8100 Loop Connection Lost

kamel_88 — Wed, 10 Oct 2012 16:28:09 GMT

Thank you giladzzz for your efforts. The 2nd rack contains 5 disk enclosures numbered 16 -> 20.

According to the disk placement recommendation, i swapped the disk enclosure cables for the enclosure identifiers leading to15 -> 19 disk enclosures as shown:

After that, I added an additional disk to the EVA & the loop connection problem was resolved.

There are still 2 failed disks that need replacement. The EVA will do some leveling on the Disk Groups which could take some time. After that, we'll try to reduce the allocated luns to give free space to the disks because the EVA is getting full & the traffic is high.

Thanks again for your support.

Cheers.

Re: HP EVA8100 Loop Connection Lost

IKA_KARCHAVA — Tue, 13 Nov 2012 22:05:07 GMT

Hi, check the HSV 210 controller battary state from console (it maybe faulty), it is working now in ,,safe mode" and not looping.