LV Creation doesn't work correctly. about blivet HOT 4 CLOSED

@dwlehman, do you remember why you put 500 MiB there?

from blivet.

The minimum free space per disk of 500 MiB is fairly arbitrary. I suppose it could just as easily be 200 MiB. The reason we use the smaller of 500 MiB and the requested device's size is to allow requests for devices smaller than 500 MiB. What I really did not expect is people trying to use disks with such small amounts of free space.

from blivet.

For LV creating on single disk, if free space is less than 500 MiB, the request LV size must be less than or equal to free space. If free space is greater than 500 MiB, the request LV size can be less than or equal to or more than the free space. I can accept the different behavior above for single disk.

For LV creating on multiple disks, if free space of disk is less than 500 MiB, for example, I have 5 disks with free space 400 MiB. If I want to take all free space to create LV with size 2 GiB on these disks with new VG created, It's not possible for blivet to handle this request. Blivet will complain that "not enough free space for new device". I expect blivet can handle above request successfully.

from blivet.

For creating such small LVs the best approach is to use Blivet.new_partition, Blivet.new_vg, Blivet.new_lv instead of the device factory. I would prefer to remain on the safe side than to spend a great deal of time trying to get really smart about how to know the smallest possible size.

from blivet.