Hello,

i am trying to rename a file X to file Y on different location .

lets say the mv command started but for some reason system crashed while it did not finish.

will file Y be created physically with lets say half the records of what was in file X???

thanks in advance.

From the AIX mv man page:
So it should delete the source only when the copying was successful. You can test it by moving a large file maybe and while it is copying, you send the mv a kill -9, which should bash it very hard, ie. like a crash.

However, yes, it's quite possible that the destination exists but only has a fraction of the complete file. Examine the file's size and maybe md5sum to be on the safe side.