R.Smits wrote:
> Hello people,
>
> We have a problem and I hope someone can help us out here.
>
> One of our iscsi stacks had a fault. So the disk was gone for a couple
> of minutes.
>
> Now everything is back up. But when we want to access the disk we see
> the folowing with the format command:
> We can choose the disk, but it says "not formatted"
>
> 4. c2t0690A018E0F14991125844847700D063d0 <drive not available>
> /scsi_vhci/ssd@g0690a018e0f14991125844847700d063
>
> In messages file :
> Aug 8 21:35:51 srv1 scsi: [ID 107833 kern.warning] WARNING:
> /scsi_vhci/ssd@g0690a018e0f1499112
> 5844847700d063 (ssd0):
> Aug 8 21:35:51 srv1 offline or reservation conflict
>
> We have not rebooted the machine because this would cause a lot of
> trouble for our customers, so we want to avoid this.
>
> What is this and how can we make this disk available again ?
>
> We tried : "devfsadm -C" but no luck.
>
> Anyone ?
>
> Greetings... Richard

It looks to me as if the disk has become corrupted somehow or there is
still a hardware problem. Can you replace the disk drive and restore
from backup?

There is much to be said for both RAID and making regular backups.
Both, IMHO, are essential to the integrity and availability of your data!

There is also much to be said for having spare disk drives available.
If you have a really expensive field service contract, they can probably
get a new drive to you in a couple of hours. If you stock your own
spares, that becomes a couple of minutes!