Mac Pro very slow with NAS (network attached storage) after OSX Update
**I seem to have a rather unknown problem because after hours of google'ing I found nothing.**
**I'm working on a late 2008 Mac Pro with the 8 core Nehalem processor and 12 gigs of ram and some other hardware like a Blackmagic Decklink HD extreme.**
**(If you care to know the exact specs I can gives those to you, but right now I'm degrading the Mac Pro to 10.6.0.)**
**The Mac Pro connects via an ethernet cable > ethernet breakout > directly to an Mac Pro G5 PPC on a CAT5.E ethernet cable.**
**This G5 is running leopard and has our hard drives and RAID connected to it of which we work on our Mac Pro 2008. Normally this gives us the ability to read with over 100 mb/s and write at about 70 mb/s (Blackmagic diskspeed test).**
**But recently our drives got really, really slow. It wouldn't even play PAL footage realtime in our Final Cut timeline.**
**But as we downgrade to 10.6.0 this problem is gone. So we think that when we upgrade to 10.6.5, the problem initiates.**
**How does this happen and, more importantly, how do we get rid of this?!**
**Good to know; our 27" iMac or any other device in this building _does not have_ this problem. It's just the Mac Pro after an update.**
**Please help us out.**
**Kind regards,**
*W.*
24" iMac 2,8 GHz Intel core 2 Duo, 4GB 800 MHz DDR2 SDRAM, Mac OS X (10.6.1)