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Bay 1 WD Caviar Black 1TB - Users directory, Video, storage
Bay 2 WD Caviar 500 gig - Windows XP plus some other partitions
Bay 3 WD Caviar 750 gig - Music
Bay 4 WD Raptor 74 gig OSX (loud, so its the furthest bay from me)
Second optical bay - stock 320 gig Seagate for SuperDuper backup of OSX

I use the MP primarily for Logic Studio. I haven't used BootCamp or Fusion in ages. I may slick the 500 gig and try Windows 7. Not sure.

I have another 1TB Caviar Black to install. I also have a Seagate 500 gig. I may swap the stock 320 backup drive with the 500.
I'm not really happy with the setup now. I'd like to eventually have four 1 TB or 1.5 TB drives and a fifth OS drive on an SSD and sell the smaller capacity ones, or put them into some sort of JBOD NAS or something. Waiting to see "what's next" with SSD and of course some price drops.
 
I thought, from this thread - https://forums.macrumors.com/threads/758672/ that it wasn't possible to connect two ssd's in the 2nd OB (let alone 4 drives altogether!). If I could raid two X25-M 160 GB together in my 2nd OB for boot and apps and keep the other 4 bays for storage, I'd be very happy. Can you give a quick explanation how you guys did it? (I have an '09 Mac Pro, if that makes any difference?)

I think the reason it works for me is because I'm using the Apple RAID card to connect the 4 internal bays which opens up the miniSAS (ipass) connector on the logic board for the 4 drives in by optical bay. My machine is a 2008 Octo, I don't think the same set-up will work on a 2009.

I believe you only have one open SATA port on your logic board and the RAID implementation on the 2009s does not free up the onboard miniSAS port.
 
Bay 1: WD Cav. Black 1TB RAID 0 (w/Bay 2)
Bay 2: WD Cav. Black 1TB RAID 0 (w/Bay 1)
Bay 3: EMPTY
Bay 4: WD Cav. Green 2TB (Data Backup)

2 x Superdrives in the ODD Bays

Software development (app servers, db servers, dev tools, virtual machines)
Audio re-mastering
Video transcoding
Folding@Home
Browsing the web, reading email, listening to music, watching movies :)
 
Just upgraded all of my drives last week

Old arrangement:

Bay 1: Seagate 7200.10 400gb Raid 0 OSX and programs
Bay 2: Seagate 7200.10 400gb Raid 0
Bay 3: WD Caviar Black 500gb Raid 0 Data Files
Bay 4: WD Caviar Black 500gb Raid 0

ODD: WD Caviar Black 750gb - Back up of critical stuff

New setup: waiting on the Intel SSD to set up

Bay 1: Intel SSD 160gb OSX/Win7
Bay 2: Hitachi 2T 2k7000 back up
Bay 3: WD Caviar Black 1T OSX work files
Bay 4: WD Caviar Black 1T Win 7 work files

ODD_1: LG 8X BD
IDE: new Samsung 22x DVD/RW

Primary usage is playing solitare

I think you may want to get a beefier set-up for that sort of usage.
 
Current setup.

Bay 1: Intel 160gb G2 - OS X/Win 7 64 Boot
Bay 2: Seagate Barracuda 7200.11 1TB RAID 0
Bay 3: Seagate Barracuda 7200.11 1TB RAID 0
Bay 4: Seagate Barracuda 7200.11 1TB RAID 0

Visual FX/Digital Compositing/Video

But currently being used to......play World of Warcraft.
 
1: 300 GB WD Velociraptor (OS)
2: 1 TB WD Caviar Green (Time Machine)
3: 1 TB Samsung Spinpoint F1 (Data, Raid 0 with 4)
4. 1 TB Samsung Spinpoint F1 (Data, Raid 0 with 3)
 
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