I have a three node iScisi-Cluster running NW 6 SP5 and NCS 1.6.5.
Ther Servers are connected via a seperate switch to an iScsi-Raid.

Frequently followinf error apears on different pools:
----------------------------
Deactivating pool
"MAN"...

6 Apr 2007 12.23.26 NSS<COMN>-3.05-xxxx:
comnPool.c[2534]
Pool MAN: System data I/O error
20204(zio.c[1895]).
Block 13449652(file block 49534)(ZID
3)

Deactivating volume
"MAN"...
Dismounting Volume
MAN
The share point "MAN" has been deactivated due to dismount of volume
MAN.
------------------------------

Entering
cluster offline xxx
cluster obline xxx
its okay for then next one or two days.

Any advice?

Thank You
akunberger