On Tue, 2011-07-05 at 22:09 +0200, Reindl Harald wrote: > Am 05.07.2011 18:14, schrieb Patrick O'Callaghan: > > Flash drives can become slow because of their internal > > architecture, fragmentation, wear leveling etc. > > flash drive and fragmentation? > jokingly?
No, not joking, though fragmentation is probably the wrong term. What I meant was that flash drives work in fixed-size units which a) are usually not the same as the filesystem allocation size, and b) must be erased before being written on, i.e. writing one byte costs almost the same as writing a full unit (in fact it could conceivably cost more because in the one-byte case the rest of the unit has to be read first). If a file is not aligned with these units then more of them than necessary will need to be read, erased and rewritten, slowing the process down. One could probably design a pathological worst case that takes twice as long as the best case. poc -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
