On 10/02/13 08:32, Bill Broadley wrote: > SSDs and controllers often support NCQ which allows multiple > outstanding requests.
That's only useful if the SATA spec lists the command as being queueable, and until SATA 3.1 TRIM wasn't one of those (and so executing it hit performance, and not executing it can also harm performance for certain drives). http://techreport.com/news/21311/sata-3-1-spec-brings-swap-standard-improved-trim cheers, Chris -- Christopher Samuel Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.org.au/ http://twitter.com/vlsci _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
