Internal SATA to SATA transfer speeds at 20Mb/sec... Please Help!

[ancientscream]

well thank you 4 your feedback. i am still kind of bumed , the HDD box says 300 MB/s and the mobo is 300MB/s and i get 130MB/s burst and about 63MB/s average......... o well. i think 4 now i will try a few 150 GB WD raptors in raid 0+1 and see what i get. with my system im waiting on my HDD's all the time. thanks again 4 your help

sadly its the difference between theoretical max's of the protocol itself ie sata and the real speeds of a mechanical drive connected via said protocol, and the fact marketing wise they make a much bigger deal of protocol speeds than actual speeds achieved in reality, the law needs to stifle anything other than in practice speeds being quoted for drives themselves

 

[Royalty_Rules]

well thank you 4 your feedback. i am still kind of bumed , the HDD box says 300 MB/s and the mobo is 300MB/s and i get 130MB/s burst and about 63MB/s average......... o well. i think 4 now i will try a few 150 GB WD raptors in raid 0+1 and see what i get. with my system im waiting on my HDD's all the time. thanks again 4 your help

sadly its the difference between theoretical max's of the protocol itself ie sata and the real speeds of a mechanical drive connected via said protocol, and the fact marketing wise they make a much bigger deal of protocol speeds than actual speeds achieved in reality, the law needs to stifle anything other than in practice speeds being quoted for drives themselves

are your bios setting correct? On my old AsRock MoBo, I don't have, but one option when it comes to SATA, either Raid or Non Raid for both On Board Sata ports... in Non Raid, my speeds are limited to around 90Mb/s, while in raid, they're limited to 125Mb/s ...

 

[ancientscream]

……………
I think im gonna check jumpers and throw the drive in a PC and reformat and run some low level WD tools if I can be bothered, I swear these manufacturers make these drives hide from us whats actually going on with their drives, as this might be some kind of fallback survival mode. and test a different drive in the imac to check sata on the MB isnt someway knackered ? maybe a dodgy cable as the sata cable in the imac is squished about ?……………

well i eliminated the sata cable as a cause, then changed the jumper from spread spectrum to forced 1.5gbps and did seem to get the drive upto 37 Mbytes a sec write yet only 28.7Mb sec read ? this still seems wrong to me but i cant find any decent performance tests for drive to compare it with, anybody know of any review transfer rates data for this drive WDC WD1600JD-75HBC0 ? its a WD160gb sata drive ? what should I be getting ? on a 1.5gbps sata chain ? I thought anywhere from 50 -80 Megabytes a sec, but am I dreaming on drives this age ?

 

[bangbangtang]

I also have this problem, maybe because I'm using only 1 HD (divided into 3 partitions) for primary drive and files

 

[popatim]

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