Messages in this thread | | | Date | Mon, 26 May 2008 19:28:23 +0200 | From | "Bart Van Assche" <> | Subject | Re: Top 10 bugs/warnings for the week of March 23rd, 2008 |
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On Mon, May 26, 2008 at 7:09 PM, Oliver Neukum <oliver@neukum.org> wrote: > Am Montag 26 Mai 2008 19:01:48 schrieb Theodore Tso: >> If the USB stack folks would like to work on how to recognize that >> it's the same USB stick that had been previously pulled, so that it >> gets the same block device, and we can decide for how long we should >> keep dirty buffers around associated with a pulled USB stick, we can >> certainly have that conversation. :-) > > Even if we could tell whether the device has remained the same, how > would we know the medium wasn't exchanged?
Looking at the filesystem UUID could help -- this is an ID that is present as data on the disk, and that is even independent of the bus type. See also /dev/disk/by-uuid.
For the journaling filesystems I am familiar with the default value for the commit parameter is 5 seconds. Would it be a good idea to leave the default to 5s for non-removable devices, and to change this default to 1s for removable devices ?
Bart.
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