Mr. Greg,
You don't get to go Bob Z on me until you've actually made it to OKI Dog. I haven't discounted your suggestion but I want to experiment with multiple OS drives and compare clean install performance with my cloned MBP startup drive. Once I get things dialed in I will find the sweat spot and do what you say with an SSD. This is my chance to get more familiar with the new recovery partition approach and the difference between archiving the recovery partition vs. creating a new recovery partition etc. Once I move to a 4 drive stripe with the SSD startup I'll at least have had a chance to play/break the raid configuration and check performance. I've read on the L2 that 2 way stripe should be approx double the throughput and 3 way approx 3 times the throughput over the single drive performance. That's not what I'm seeing so I'm curious what elements are in play that I'm not understanding. As far as problems with 4TB drives, I too have some issues with them being recognized properly over firewire with my IDX enclosure. Same enclosure using ESata and the 4TB is fine. My Voyager dock is fine with firewire and esata using 4TB. I figure it must have to do with the chipset or some such thing in the particular unit. Does that mirror your problems with external boxes and 4TB. Frankly I was quite disappointed with the otherwise robust idx enclosure but haven't bothered to jam them up on this point.
--- In Avid-L2@yahoogroups.com, Greg Huson <Greg@...> wrote:
>
> John,
>
> I'm going to get all Bob Z on you here and ask, 'Why don't you just do what I tell you?'
>
>
> MacPros don't run at SATA3- they only run SATA2, but the drives are backwards compatible. I've had some trouble with 4tb drives in 'toasters' or external FW cases, but they seem to work reliably in the macpro. I don't have access to any of our bays now, but I'm pretty sure I get better speeds than that.
>
> Keep your boot drive lean- get rid of all the 'template' content you install when you install when you install all FCP and Adobe - it should be 80-90 gig if you have a bunch of apps. Go to Fry's and get the biggest SSD you can afford - certainly no smaller than about 120, but 256 is better. (You could also order it from crucial or someone like that - you don't need the top-end, anything will do, but fry's runs a loss-leader specials all the time)
>
> Install the SSD drive in the lower optical drive slot. You can attach it to the side with a single screw, or buy a fancy adapter plate, but, honestly, they're so lightweight it doesn't seem to hurt just to let it hang in there.
>
> Clone your OS to the SSD, restart the computer on the SSD. You'll find boot times, software install times, and general responsiveness to be dramatically improved. I get very annoyed now when working on a machine that DOESN'T have an SSD boot drive because they seem so slow.
>
> Then, re-configure the raid as a 4-way stripe. Not sure you'll get better access times, but you should.
>
> Remember to keep your desktop fairly clean and clear caches, download files, etc., periodically so you don't fill up the no longer massive boot drive.
>
> There's a piece of free software that graphically shows you how your storage is being used - can't remember what it's called - grand overview or something like that - if you need to figure out what junk you can delete from your boot drive before cloning.
>
>
> Greg H, on vacation, waiting for my slumbering wife to appear. Happy New Mac, john.
>
> Sent from my iPad
>
> On Dec 28, 2012, at 10:33 AM, John Moore <bigfish@...> wrote:
>
> > I've put 4 4TB Hitachi Deskstar 7200 RPM drives in my new 12 core MacPro. Using one drive as startup and three for the raid strip made with disk utility. AJA system test yields 153.2MB/s Write and 240.4MB/s Read. AJA data calc shows 1920x1080 1080i 10 bit YUV data rate at 165.72 MBytes/sec. If both these are accurate wouldn't that mean I would have a potential bottleneck trying to capture uncompressed 1:1 in Avid? I was also surprised to see the AJA disk whack speed test came out around 100 MB/s write and 150MB/s read on the single startup drive. I would think the three way strip should be ball park 3 times faster. Is this lower than expected performance a product of the mac disk utility software raid? Am I oversimplifying the process thinking internal drives should be faster than some external connected storage solutions? I've been told internally the macpro is sata 2 not 3 but in googleing sata 2 can yield 300MB/s. Clearly I'm not
> > fully clear on the data balistics of the MacPro internal drives. I have had decent performance with a 2 drive strip with DNX 220 on a MacPro SNDX 4.x. Never tried uncompressed on that config. Curious what others have done. I set the raid block size to 256K after reading a tutorial on how to set up the raid. Does that seem like an optimal block size? TIA
> >
> > John Moore
> >
> > Barking Trout Productions
> >
> > Studio City, CA
> >
> > bigfish@...
> >
> > [Non-text portions of this message have been removed]
> >
> >
>
>
> [Non-text portions of this message have been removed]
>
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