On Thu, 14 Jun 2012, Mike Clarke wrote:
On Thursday 14 June 2012 07:05:11 Polytropon wrote:
I don't think that's a problem. I've got a USB stick here
that has a blinkenlight as soon as it's powered on (plugged
in), even if there is no reading / writing / mounting activity.
After you've successfully performed umount, the USB stick _is_
synced and can safely be removed, no matter what you assume
the funny lights want to tell you.
Is it possible that there is volitile memory buffering in the stick that
may not have been written to flash when umount thinks it is complete, and
the flashing light is an indication that power is still required to
complete the write to non-volitile memory?
Futhermore, are we sure that umount even waits for a sync? There is no
mention of that in the man page and I don't recall any long waits for
umount to return.
daniel feenberg
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