iPC osx86 10.5.6 System Stall HDD

[JonnyF]

Hello all,

Hopefully you can point me in the right direction?

I have an almost perfect install of iPC OSX86 10.5.6 using the default Vanilla settings.

i.e. EPI_V9, Vanilla kexts, no drivers required.

However I have one major issue!

Everything works fine, but when I copy a file - usually a large file, but that's not the problem - the system stalls, the file pauses in the copy process and applications hang.

After 30 seconds or so the system resumes, until it hangs again between 30 seconds and a minute later and the process is repeated.

If I cancel the copy operation the system resumes normal operation, it hangs in the same way now and again, but no where near as often as when there is a HDD WRITE in progress.

I have tested various things including

Installing to another drive.
Swapping SATA cable / moving to an alternate port with all other drives disconnected.
Partioning with GUID or MBR.
Installing or not installing Intel ACHI kexts (both variants on the disk)
Turning off Speedstep etc. in the bios.
Upgrading to 10.5.7 (which works flawlessly - the upgrade I mean!)
All sorts of other things I can't even remember!!

My System is as follows

Abit IP35 Mobo (Intel P35 chipset / ICH9R / on board ALC888)
4Gb RAM
NVidia 8800GTX
80Gb SATA HDD
Optiarc SATA DVD-ROM

Everything works 100% when running windows etc. (although this is installed on a 750Gb 3 way RAID array - not connected when running OSX)

Hope someone can help with this rather odd issue!!

Cheers,

Jon.