Re: [Avid-L2] Re: 3 way internal stripped raid on MacPro Speed?

> You don't get to go Bob Z on me until you've actually made it to OKI Dog.

A late contender for L2 quote of the year!

Hau'oli Makahiki Hou to all.

- Rich

Rich Ford
San Diego

On 12/28/12 11:12 AM, johnrobmoore wrote:
>
>
> 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 <mailto:Avid-L2%40yahoogroups.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]
> >
>
>


------------------------------------

Search the official Complete Avid-L archives at: http://archives.bengrosser.com/avid/
Yahoo! Groups Links

<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/Avid-L2/

<*> Your email settings:
Individual Email | Traditional

<*> To change settings online go to:
http://groups.yahoo.com/group/Avid-L2/join
(Yahoo! ID required)

<*> To change settings via email:
Avid-L2-digest@yahoogroups.com
Avid-L2-fullfeatured@yahoogroups.com

<*> To unsubscribe from this group, send an email to:
Avid-L2-unsubscribe@yahoogroups.com

<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/