topic Re: EVA 8100 Operating System Type in Disk Enclosures

EVA 8100 Operating System Type

Brantley Fry — Fri, 14 Jan 2011 19:31:30 GMT

Is it possible to change the Operating System Type of a host 'on the fly'? Or do I need to unpresent LUNs, change the setting, then present the LUNs back to the host?

thanking all replies in advance.

Re: EVA 8100 Operating System Type

Torsten. — Fri, 14 Jan 2011 19:47:28 GMT

AFAIR it is possible on the fly, but it depends on the OS what it will do then ...

what OS is it?

Re: EVA 8100 Operating System Type

Brantley Fry — Fri, 14 Jan 2011 19:48:31 GMT

They are Linux hosts. The OS Type was set to MS Windows originally.

Re: EVA 8100 Operating System Type

hvhari — Tue, 18 Jan 2011 07:21:35 GMT

Yes, you can correct the OS type on the fly. Prefer to do this after stopping the host IOs, to ensure unexpected disturbance during the change.

Re: EVA 8100 Operating System Type

Brantley Fry — Tue, 18 Jan 2011 14:23:12 GMT

thanks for the feedback.

HP Support told me this:

"Hi Brantley,
I do not see any article or document about the risks involved in doing it online. But when I check with few of my next levels also they confirmed that this is a big risk and it might work for a month , a year , a day depends on what host does and the worst part is that it will be very hard to troubleshoot if/when the host has an issue and path failover could break, clustering could break which make troubleshooting difficult in future."

however, I am not convinced that this is the case. I would like to get some additional feedback before requesting an outage to unpresent LUNs..