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On 06 Sep 2013 13:11, CRPence wrote:
<<SNIP>> Because each WRITE operation to a save file is validated
synchronously <<SNIP>>
http://pic.dhe.ibm.com/infocenter/iseries/v7r1m0/topic/rzaiu/rzaiusfoperations.htm
IBM i 7.1 Information Center -> Systems management -> Backup and
recovery -> Backing up your system -> Preparing your media to save your
system -> Choosing your save media -> Save files
_i I/O operations on a save file i_
"Review these considerations which apply to input and output operations
on a save file.
* Records are always read and written sequentially. The records
read from a save file contain sequence and parity information that is
validated when the records are written into another save file. This
information ensures that the records are processed in sequence and have
not been changed.
You cannot write a record that has changed since it was retrieved
from another save file. You cannot write a record that is not the next
record in sequence. If you attempt either of these, an escape message is
sent to report the error.
..."
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