On 4/18/2017 11:28 PM, Wang Dong wrote: > The user offers an end, and if it is smaller than the partition end, > it is a shrinking. And this exception will only be raised when a shrinking > happens. I think we can check if it is a shrinking earlier. I mean > before to > change the disk layout.
The user may specify to add 1 sector to the end, but after applying it, the partition table code may decide to snap it down to a cylinder boundary, resulting it in now shrinking the partition. > "Your discard" can not be done without a device re-reading. User has to > re-read > the device to get the real disk layout. This is not good I think. It > will confuse > user. You don't have to re-read. As I said before, you just have to make a copy of the PedDisk, modify the copy, leaving the original alone, and then pick which to keep and which to discard.
