My Laptops internal 640 GB HDD ,WD Scorpio blue(WD6400BPVT). It has 5 partitions.
- 120 GB NTFS partition, primary, sda1
- 250 GB NTFS, extended, sda5
- 20 GB / (root), sda6
- 4 GB /swap, sda7
- ~ 202 GB /home, sda8
Those two NTFS partitions due to previous windows installation, but read/write speed on NTFS partitions is only around 42 MB/s, while read/write speed on ext4 partitions are over 85 MB/s. I'm am geting such slow speed since installed Ubuntu 14.04 .
What is the Problem ?
note
- I had defragmented both NTFS partitions before Installing Ubuntu
- I also tried to defragment with this command, but no luck.
fsck -t ntfs --kerneldefrag /dev/sda
fsck -t ntfs --kerneldefrag /dev/sda
does defrag on the whole disk where a valid NTFS structure doesn't even exist (well, you can't find the proper offsets for NTFS stuffs then), not on your partitition/dev/sda<num>
. Also try raw reading speed testing likedd if=/dev/sda<num> of=/dev/null bs=128M count=16
so you can confirm it's not a problem with the disk and there's really something to do with ntfs-3g. Many hard drives get slower as the physical location of the data on the disk gets to the inner tracks. Not-that-native filesystems are quite likely to be slow, so don't be surprised.dd if=/dev/sda1 of=/dev/null bs=128M count=16
, it is showing speed around 112 MB/s , surprising ! why ?