On Mon, Sep 02, 2024 at 08:30:03PM +0200, to...@tuxteam.de wrote:
On Mon, Sep 02, 2024 at 01:49:03PM -0400, Michael Stone wrote:
On Mon, Sep 02, 2024 at 01:11:24PM -0400, The Wanderer wrote:
> I have always treated the *nix equivalent to "eject", for the purpose of
> a USB flash drive, as being 'umount /path/to/mount/location' - which, if
> I'm not mistaken, does include an implicit sync operation.
Yes. Windows actually does have an option to eliminate the eject step by
performing all writes synchronously (I think it may even be the default in
current versions) but it makes working with removable media painfully slow.
Linux has a similar option (mount with the "sync" option) but it is
generally not used because of the really significant performance impact, and
because it can cause much faster wear on flash devices (because there is no
opportunity to coalesece small writes into larger writes).
This is exactly why I'm always trying to "sell" the "oflag=sync" option of
dd. You are going to write each block exactly once, then plop the medium
out. So whithout, it'll take you 10 sec, with it'll take you as much. But
it's more transparent with, because without, the OS is flushing cache in
the background.
It's a waste of time but if you make it happy you do you. Please don't
impose it on others.
