Klistvud put forth on 12/18/2010 3:32 PM: > Before partitioning and formatting: > > obelix# hdparm -tT /dev/sda > > /dev/sda: > Timing cached reads: 1726 MB in 2.00 seconds = 713.98 - 862.86 > MB/sec (several iterations performed) > Timing buffered disk reads: 336 MB in 3.01 seconds = 100.01 - 111.72 > MB/sec (several iterations performed) > > After partitioning the drive, aligned on modulo 8 sector boundaries: > > obelix:# hdparm -tT /dev/sda > > /dev/sda: > Timing cached reads: 1264 MB in 2.00 seconds = 631.97 MB/sec > Timing buffered disk reads: 252 MB in 3.08 seconds = 81.80 MB/sec
> expected, the rsync results for the last partition became consistent > with the other partitions (i.e. around 60 MB/s). > All testing was done with a ~700-MB ISO file What is the result of? dd if=/dev/zero of=/some/filesystem/test count=100000 bs=8192 That will write an 810MB file of all zeros, and will give you a much better idea of the raw streaming write performance vs copying files from the old 160GB drive to the new one. I would think the result should be a bit higher than 60MB/s. Also, make sure you're using the deadline elevator instead of CFQ as it yields better performance, especially on SATA systems that don't support NCQ: $ echo deadline > /sys/block/sda/queue/scheduler You may want to add this to your boot scripts to make it permanent. I roll this option as the default in my custom kernels. -- Stan -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/4d0d8aa9.3050...@hardwarefreak.com