You might consider issuing a sync call in your scripts before splitting off
a mirror.  You do not want to miss any dirty block in the I/O buffer cache
that have not made it to the disk storage.  If the mirror split process
already contains a sync, then it will take little additional time as there
will be few new dirty blocks in the buffer cache after you have already
issued one sync.

Mark A. Baldridge
Principal Consultant
North American Lab Services
DB2 Information Management, IBM Software Group
(607) 351-5666
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