Hi all,
Strange USB 3.0 behaviour !!!!!
System_ GA X58A UD5, i7 930, OSX 10.9.2.
So USB 3 chip is NEC/Renesas, and known issues are there.
I installed using UB 6.0, Everything was fine after installing including USB 3 tested
and was working fine with the drive I was testing.
After a week I connected another drive(Seagate Expansion Desk-2TB with Power).
With this particular Brand and model USB 3 is only reading at full speed. Writing speed
is terrific, some times less than 2 MB/s while read speed is always above 120 MB/s.
I further tested with different drives including Seagate portable drives which all are working as expected.
I even tested the USB 3 port by connecting a SD card, read- write- format all work and perform as expected. Tested with Toshiba and WD drives, works OK. Only trouble so far tested is the Seagate Expansion Dest- it is read only on USB 3. Working as usual in USB 2.0 port. Same system performs
well all USB 3 activities in Win 7. Any idea?. Can somebody help me. We have several Seagate drives here.
The kext currently installed is GenericUSBXHCI-Version 1.2.7.
mcity