On Fri, 2008-10-03 at 09:48 +0300, Artem Bityutskiy wrote: > Hi David, > > David Woodhouse wrote: > > It's intended to prepare the command which will be sent to the device, > > much like the prepare_flush_fn does. See sd_prepare_flush() in > > drivers/scsi/sd.c for an example (all the devices we've hooked up for > > discard in Linux so far are virtual ones, so they don't make good > > examples). I do have a real ATA drive with TRIM protocol support on its > > way to me though, so I'll be looking at that some time soon. > > Sorry for my ignorance, but why "discard" is used in hard drive? What > may it improve? I've always been thinking it is only useful for SSD and > other FTL-enabled beasts. I said 'real ATA drive'. I didn't say it was magnetic. -- David Woodhouse Open Source Technology Centre David.Woodhouse@xxxxxxxxx Intel Corporation -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
