Noticed this when testing Kanex tbolt/USB 3.0 adapter

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so goal see difference in speed through new kanex tbolt ethernet + usb 3.0 adapter on usb-speed-deprived 2011 2.7 i5 imac.

no surprise read & write speeds have improved considerably, going 2.0 3.0 on same external hd (sp armor 30, 1 tb 5400 rpm). example, using black magic speed test, see approximately 3x speed change. speed through adapter same if hd connected directly or through powered hub (12v 2a anker ah111).

thing noticed bit strange ~25% difference in speed running 2.0 usb (i.e., not through kanex) directly vs. through hub.

easier see through numbers. these numbers pretty consistent no matter how many times run test. i'm not paying attention actual mb/s speeds don't know how accurate blackmagic app is, more relative speeds, i.e., percentage difference.

usb2, directly mac - ~31 write/~37 read
usb2, through hub - ~24 write/~30 read
usb3, directly mac - ~100 write/~108 read
usb3, through hub - ~104 write/~107 read

drops in speed when running usb 2 through hub, speed stays same when running usb 3 through hub. dunno, maybe common knowledge, new me though... usb 3.0 is. :d
 



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