- Thread Author
-
- #1
I have connected my computer through USB 3.0 cable with an external (backup) hard disk (Hitachi HDS724040ALE640, SATA III, 7200rpm, 4TB, NTFS formatted, empty).
The USB controller in external case box and the
USB port on mainboard are USB 3.0 compatible.
When I benchmark now the transfer rate with well know, wide spread tools like
CrystalDiskMark (see: Download)
then I can see a huge difference between the sequential read/write and the random access read/write transfer rate.
See the attached snapshot (top 2 lines: sequential read/write; Bottom 2 lines for random read/write).
Is this a general observation?
Since users need on 99% of the usage a random access the sequential values are almost meaningless.
720-760 KBps (NOT: MBps) for random read speed? Is this normal?
USB 3.0 and SATA III shouldn't be the bottleneck.
Is there any way to improve the random access read/write speed in Windows?
E.g enabling Write cache or USB property value or driver setting?
Does defragmentation help (significantly)?
What has the most impact on the transfer speed with random access?
The USB controller in external case box and the
USB port on mainboard are USB 3.0 compatible.
When I benchmark now the transfer rate with well know, wide spread tools like
CrystalDiskMark (see: Download)
then I can see a huge difference between the sequential read/write and the random access read/write transfer rate.
See the attached snapshot (top 2 lines: sequential read/write; Bottom 2 lines for random read/write).
Is this a general observation?
Since users need on 99% of the usage a random access the sequential values are almost meaningless.
720-760 KBps (NOT: MBps) for random read speed? Is this normal?
USB 3.0 and SATA III shouldn't be the bottleneck.
Is there any way to improve the random access read/write speed in Windows?
E.g enabling Write cache or USB property value or driver setting?
Does defragmentation help (significantly)?
What has the most impact on the transfer speed with random access?
Last edited: