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Disk-to-disk transfer rates - SATA to/from USB 3.0 is 3-5x faster than SATA to/from SATA

Tags:
  • Western Digital
  • Storage
  • USB3
  • SATA
Last response: in Storage
September 12, 2013 2:07:15 PM

Asus MA88T/M-USB3 Motherboard
AMD Phenom II 6-core 1090T 3.2GHz
16GB DDR-1600 (4x4)
Onboard 6-channel SATA II
WD, Hitachi and Seagate drives
Mediasonic USB 3.0 External
Seagate USB 3.0 External
Windows 7 Ultimate 64-bit

Test results:

WD 3TB (new) to WD 3TB (new)
SATA II to SATA II (onboard)
Video files (100MB - 4GB)
20-28MB/sec

WD 4TB (new) to WD 4TB (new)
SATA II to SATA II (onboard)
JPEG and CR2 (1MB - 60MB)
20-28MB/sec

WD 1.5TB (2yr old) to Hitachi 2TB (3yrs)
SATA II (onboard) to USB 3.0 Ext (Mediasonic)
Movies and TV (250MB - 4GB)
95-125MB/sec

Seagate 1TB (4yrs) to WD 1.5TB (2yrs)
USB 3.0 Ext (Seagate) to SATA II (onboard)
Movies and TV (250MB - 4GB)
85-110MB/sec

All tests done using Fastcopy 2.08, adjusting buffer size between 32MB and 1024MB to find optimum (128MB for small files, 512MB for large files)

Any idea what gives?

More about : disk disk transfer rates sata usb faster sata sata

a c 288 G Storage
September 12, 2013 2:27:43 PM

Were the sata/sata tests done to the same device, or different 3/4tb drives?
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September 12, 2013 3:00:39 PM

geofelt said:
Were the sata/sata tests done to the same device, or different 3/4tb drives?


I bought four brand new drives (2 x 3TB and 2 x 4TB Seagate, not WD (oops)). I installed one of each in my PC, copied files from smaller drives (5DMkII MOV Video files to the 3TB and JPEG/CR2 to the 4TB), then started to make duplicates on the other two corresponding new drives. Also reformatted 1.5 and 2TB drives, then started copying TV and movies (250MB - 4GB) to them, as well as making backups. I've tried most of the possible combinations, and each one seems to show copying onboard SATA to/from USB 3.0 is much faster than from SATA to SATA.
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