On Jan 30, 2014, at 12:48 PM, Andreas Rohner wrote: > > I have just finished a test with my 100 GB HDD and SSD. I filled it > with dd until it was 100% full. Then I cut power to the machine and > timed the following mount operation: > > 100GB HDD: > time sudo mount -o bad_ftl /dev/sda1 /mnt/ > > real 1m21.068s > user 0m0.020s > sys 0m0.770s > > 100GB SSD: > time sudo mount -o bad_ftl /dev/sdc1 /mnt/ > > real 0m2.124s > user 0m0.010s > sys 0m0.243s > > So it looks quite bad for hard drives. To scan a 1 TB hard drive would > take 13 minutes. > > But a 1 TB SSD would only take 20 seconds! > I think that it will be good to have comparable results for the same environment. I mean, for example, measurement in different situations for SSD (without your patch and this your patch). How much time do you need for scanning the whole SSD by your approach? I think that comparison of linear scanning results for the whole SSD drive and for sudden power-off situation can provide basis for consideration. But sudden power-off situation can be different, I suppose. Thanks, Vyacheslav Dubeyko. > I will test one of my SD cards next. > > Regards, > Andreas Rohner -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
