Re: rsync 10 times slower in Etch than in Sarge!

on Fri, Jan 18, 2008 at 12:16:28PM -0500, Douglas A. Tutty wrote:

Why issue a 'sync' instead of just unmounting and waiting until the
thing stops flashing?



On Fri, Jan 18, 2008 at 09:24:22AM -0900, Ken Irving <fnkci@xxxxxxx> was heard
to say:

sync blocks, so you can tell from the command line when the job is done.


Daniel Burrows <dburrows@xxxxxxxxxx> writes:

So does umount. (I see you said that below, but I wanted to underline
it again; it looks like Rudolfo overlooked it) After "umount"
completes, it's safe to remove the stick.



I didn't overlook this, but:

1) in my experience, some time ago I used to extract the pendrive after
`umount' completes and the device often got corrupted. When I asked this
list for help to recover it, someone suggested to apply the `sync' option
to the mount option: since then I put that option in my fstab, until this
thread advised not to do so;

2) I measured the time, and it seems to me that the `sync' command takes a
little longer than `umount' to stop.

For these two reasons I presume that it is not safe to extract the device just
after `umounting' and without the sync option in fstab.

What do you think?

Thanks,
Rodolfo


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