[OmniOS-discuss] iSCSI target hang, no way to restart but server reboot

[Matej Zerovnik]

On Wednesday, the server crashed again. We switched to a new server(same 
model xServer 3550 M4), installed OmniOS r14 and updates LSI firmware 
from P15 to P19.

So far, everything is humming nicely, there are also no more errors in 
the logs (errors were from SAS expander and not from a particular drive, 
at least according to the target number).

New SAS drives are in order, since we want to go HA as well.

Thanks everyone for help and answers, Matej

On 28. 03. 2015 04:51, Dave Pooser wrote:
>> Having been on the receiving end of similar advice, it is a frustrating
>> situation to be in, since you have (and will likely continue to have) the
>> hardware in production, without much option for replacement.
>> When we had systems like this, we had a lot of success being aggressive in
>> swapping out disks that were showing signs of going bad, even before
>> critical failures occurred. Also looking at SMART statistics, and
>> aggressively replacing those as well.
> <snip>
>
>> Aggressively replace devices implicated by these, and hope for the best.
>> The best may or may not be what you're hoping for, but may be livable; it
>> was for us.
> Also bear in mind it's entirely possible to mix SAS and SATA drives in the
> same enclosure and even the same vdev-- so as you're aggressively
> replacing SATA drives replace them with SAS drives and your system will
> become less brittle. Assuming you're using enterprise SATA drives, their
> SAS siblings are not much more expensive (often about $20 difference) and
> the reliability gains will be significant.