IBM ServeRAID User Reference page 95

Important
Before using FlashCopy, consider the following:
v The source and target partitions must be on the same controller.
v You can have up to four FlashCopy links active at one time.
v There is no limit on source and target partition size. However, the size of the target
partition must be equal to or larger than that of the source partition. For optimal space
usage, the target partition should be the same size as the source partition.
v The source and target partitions must have the same file-system type, allocation-unit
size, and compression setting.
v The source and target drives must be part of the same type of array. That is, either both
drives are part of a spanned array, or both drives are part of a nonspanned array.
v If the source and target drives are part of a spanned array, the following conditions must
apply:
– Each array must have the same number of sub-arrays.
– Each logical drive on the spanned array can have only one partition.
v Normal I/O functions can be performed on the source partition while the FlashCopy
operation is in progress.
v If you are performing a FlashCopy backup, do not write to the target partition until the
FlashCopy backup process is complete. If you are performing a FlashCopy nobackup, do
not write to the target partition at all.
v You can use the noprompt option to run some FlashCopy functions without receiving any
interactive prompts.
Chapter 8. Installing and using the IPSSEND command-line program
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