[Users] way to edit iSCSI storage domain?

[Yuriy Demchenko]

I guess you misunderstood me
I'm going to try this scheme:
                |STORAGE|
FC             /           \
     |SERV1/tgtd|    |SERV2/tgtd|
iSCSI       \              /
          |ethernet switches|
iSCSI            ||||||||
        |blades|blades|blades|

serv1/serv2 - connectivity isnt a problem, multipathed FC scheme, all 
good. Same lun accessible for both servers and than exported via tgtd to 
iSCSI: with different target names ("iqn.2013-03.serv1:store", 
"iqn.2013-03.serv2:store"), but same vendor_id, product_id, scsi_sn, 
scsi_id. That way client can login into both targets and see lun as 
multipathed device.
And multipath failover scheme (via custom config with 
path_grouping_policy=failover for corresponding vendor_id/product_id) is 
on blades-clients - so they use only one target at time (no round-robin 
or similar stuff), but with ability to switch to another target in case 
one of serv1/serv2 is down.

However, in my case "serv2" would not be available during oVirt setup 
(need to setup ovirt and virtual servers to move stuff first), so i cant 
enter both targets on storage domain initialization - that's why I'm 
asking if there's any way to edit storage domain details after 
initialization without destroying it (maybe directly via sql or something).

Yuriy Demchenko

On 04/02/2013 06:26 PM, Shu Ming wrote:
> I am not sure if the multipathd can recognize the FC path to the 
> storage when the second server is available and regards it as the same 
> as the iSCSI path used before. If it is not, I think the device under 
> /dev/mapper may change when you cut the iSCSI path off and then enable 
> FC path. That will definitely corrupt the meta data of the volume 
> group which the storage domain is sitting on and the storage domain 
> will be corrupted finally.