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Very Slow SATA devices,please help

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The problem is the sata devices are slow and they stops sometimes, exept for the primary(where osx is installed) any solution?(i mean navigate in other sata hard drives and even on dvd drive is extremely slow/impossible,burn or read a cd/dvd take ages and in the mostly of the cases it freeze..for example last time i've tried to install hp printer from the cd and after 15 minutes installation block due dvd device fail....i've tried many kext but there's somebody have an ideas?? i've also fixed the hpet in dsdt but no luck.. any solution?


thank u very much


my specs:


sl 10.6.6

asus rampage 2 extreme bios 1502 x58

i7 920

4gb corsair ram dd3

Geforce gtx 275

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Many thanks guys,i've solved deleting all IRQNoFlag from dsdt exept for the HPET that i've set as forum says,really really thank you,It's a pleasure use this forum.


Thank you guys.



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