If the following message occurs while expanding a logical volume or file system:
# chfs -a size=+5G /fs01 0516-787 extendlv: Maximum allocation for logical volume fslv01 is 512. #
Then the cause is a limitation of the logical volume. The size of a logical volume is limited by the maximum number of LPs (logical partitions) that can be allocated for the logical volume. The error message says exactly that and even gives the current value for the maximum number of LPs. This is a changeable attribute of the logical volume and can be displayed with the lslv command:
$ lslv fslv01 ...MAX LPs: 512 PP SIZE: 8 megabyte(s) ...$
The attribute can be changed with the command chlv:
# chlv -x 768 fslv01 #
With a PP (Physical Partition) size of 8 MB, 768 PPs are sufficient for exactly 6 GB. Of course, you could consider the next expansion and set the value accordingly higher.
If there are enough 0516-787 extendlv: Maximum allocation for logical volumes free in the underlying volume group and no other limits are exceeded, the file system or logical volume should now be able to be expanded:
# chfs -a size=+5G /fs01 Filesystem size changed to 12582912 Inlinelog size changed to 24 MB. #