Why do we still need "/etc/zfs/zpool.cache" file??? 
(I could understand it was useful when zfs import was slow)

zpool import is now multi-threaded 
(http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6844191), hence a 
lot faster,  each disk contains the hostname 
(http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6282725) , if a 
pool contains the same hostname as the server then import it.

ie This bug should not be a problem any more 
http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6737296 with a 
multi-threaded zpool import.

HA Storage should be changed to just do a zpool -h import mypool instead of 
using a private zpool.cache file (-h being ignore if the pool was imported by a 
different host, and maybe a noautoimport property is need on a zpool so 
clustering software can decided to import it by hand as it was)

And therefore this zpool zplit problem would be fixed.
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