4 ms·
Oh, for sure! And rotational disk semantics are different from SSD ones. It isn't hard to start to realize that there are some things you can ask the controll
by taeric 3y ago
Oh, for sure! And rotational disk semantics are different from SSD ones.
It isn't hard to start to realize that there are some things you can ask the controller to do, that they just can't do. They can pretend to for you, though.
- ilyt 3y agoUntil we start talking about SMR magnetic drives, then they go back to being similar to "need to read to rewrite sector and write it back", althought that's mostly hidden by disk's controller.
- toast0 3y agoOnly some drive-managed SMR drives hide the need to do writes in large blocks. Of course, they hide it the only way they know how: buffer writes as much as possible, but eventually do the slow thing and hope nobody notices the performance fell off a cliff. As I understand it, host-managed SMR drives for enterprise require the host software to do writes in the correct sequence.