On Mon, 2009-05-04 at 17:11 +0200, Douglas Gilbert wrote: > Another aspect, especially if a large amount of storage > is to be trimmed, is how long will it take? This relates > to the timeout value we should associate with such an > invocation. The FORMAT UNIT and START STOP UNIT commands > have an IMMED bit, but not WRITE SAME. I was assuming it would be more or less instantaneous ... if it's not then the plan of trying to keep thin provisioning happy just by sending down a maximal trim from the filesystem is going to run into trouble. > Speaking of FORMAT UNIT, some words were added into sbc3r18 > that suggest a FORMAT UNIT command could be interpreted as > unmap/trim the whole disk. Seems reasonable ... if you format the device it could be argued you're not relying on the data contents any more ... James -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
