iscsi high availability


 
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iscsi high availability

Hi,

I want to set up a iscsi high availability with sheepdog distributed storage.

Here is my system set up. Four nodes with sheepdog distributed storage and i am sharing this storage through iscsi using two nodes as well as using a virtual ip set up using ucarp.Two nodes using same iqn. And mounted the iscsi storage as lvm partition (sdc)

Problem: when a failover happens ie iscsi switching from node one to two, the iscsi disk fails on initiator

Code:
root@prox1:~# pvdisplay 
  /dev/sdc: read failed after 0 of 4096 at 0: Input/output error
  /dev/sdc: read failed after 0 of 4096 at 104792064: Input/output error

And here is my /var/log/messages errors

Code:
Apr 10 13:08:39 prox1 kernel: sd 30:0:0:1: [sdc] Add. Sense: Unrecovered read error
Apr 10 13:08:39 prox1 kernel: sd 30:0:0:1: [sdc] CDB: Read(10): 28 00 00 03 1f 80 00 00 08 00
Apr 10 13:08:39 prox1 kernel: sd 30:0:0:1: [sdc] Unhandled sense code
Apr 10 13:08:39 prox1 kernel: sd 30:0:0:1: [sdc] Result: hostbyte=invalid driverbyte=DRIVER_SENSE
Apr 10 13:08:39 prox1 kernel: sd 30:0:0:1: [sdc] Sense Key : Medium Error [current] 
Apr 10 13:08:39 prox1 kernel: sd 30:0:0:1: [sdc] Add. Sense: Unrecovered read error
Apr 10 13:08:39 prox1 kernel: sd 30:0:0:1: [sdc] Add. Sense: Unrecovered read error
Apr 10 13:08:39 prox1 kernel: sd 30:0:0:1: [sdc] CDB: Read(10): 28 00 00 03 1f f0 00 00 08 00
Apr 10 13:08:39 prox1 kernel: sd 30:0:0:1: [sdc] Unhandled sense code

Can anyone give some idea on this? should i do anything on lvm.conf? is this the right right?

Moderator's Comments:
Mod Comment Please use code tags, thanks!

Last edited by zaxxon; 04-10-2012 at 06:07 AM.. Reason: code tags, see PM
 

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