8 Apr
2014
8 Apr
'14
1:25 a.m.
Tim Connors <tconnors@rather.puzzling.org> writes:
On Mon, 7 Apr 2014, Chris Samuel wrote:
That fs-devices->rotating variable is populated when initialising or opening a btrfs device by something like:
· if (!blk_queue_nonrot(bdev_get_queue(bdev))) . · root->fs_info->fs_devices->rotating = 1;
I wonder if a fibre channel SAN gets marked as "non rotating"? It might be rotating today, and non-rotating tomorrow when the data is a bit hotter.
OBVIOUSLY the SAN doesn't rotate, even if its disks do :-P Modulo the Earth's rotation &c.