AVS › AVS Forum › Video Components › Home Theater Computers › Planning to rebuild my 20TB WHS Flexraid server: Information requested.
New Posts  All Forums:Forum Nav:

Planning to rebuild my 20TB WHS Flexraid server: Information requested. - Page 24

post #691 of 1049
Thread Starter 
Quote:
Originally Posted by Dark_Slayer View Post

Quote:
Originally Posted by Mfusick View Post

1TB = 100GB = 1048576MB

The middle part of this was incorrect

1TB = 1024GB = 1048576MB

lol.. Ok.
haha.

I was trying to be simple. I know the 1024 thing but I doubt it matters. I was just trying to explain the time value of the faster read/writes.
post #692 of 1049
Quote:
Originally Posted by Mfusick View Post

lol.. Ok.
haha.

I was trying to be simple. I know the 1024 thing but I doubt it matters. I was just trying to explain the time value of the faster read/writes.

Well 1024GB is much closer than 100GB. Missing about 900GB.
post #693 of 1049
Thread Starter 
True^
post #694 of 1049
Did you run ATTO on your pool yet?
post #695 of 1049
Thread Starter 
No... lol

I just don't believe in the results or that they matter. Your better off shutting down the pool and benching each drive one at a time. It's a better method. Aside from that I only worry about how fast I can copy paste to or from my server. Usually around 100MB/sec for me but it varies depending on what data is located on what drive and my LAN network seems to top out around 110MB/sec anyways.. I can't seem to sustain consistently over that. I know some claim a full 125MB/sec and I'd love that- but so far no luck. I read something about turning on larger packet size or something but I lost it. That's a project for another day tongue.gif
post #696 of 1049
Yea but I am trying to figure out the explanation behind these numbers. Posted on the FlexRAID forum as well, and this is the reply I got from Brahim
Quote:
Originally Posted by Brahim 
I wish I could tell you, but there are too many people trying to copy everything I do great.
This will have to remain a FlexRAID secret sauce

Fair enough. I asked him to PM me the explanation so that his secret remains safe, and it yielded this reply
Quote:
Originally Posted by Brahim 
Err... heck no?
Also want my bank account number?

Not sure why he's evading the question. I am beginning to feel that he doesn't know the answer himself or that he implemented some sort of bogus feature to fake these numbers in order to falsely woo potential customers.

Here's the link to the thread
http://forum.flexraid.com/index.php/topic,1708.0.html
post #697 of 1049
Thread Starter 
No it's the size and that your running in the cache I bet. You have 64mb caches ?

Try a bigger test.
post #698 of 1049
Thread Starter 
I'll run it for you later when I am home
post #699 of 1049
Thread Starter 


My guess is it uses DDR memory as a cache.
post #700 of 1049
Quote:
Originally Posted by Mfusick View Post

My guess is it uses DDR memory as a cache.

What's using RAM as cache? FlexRAID or ATTO?

Doubt it's ATTO otherwise the disks outside of FR pool would get those kind of speeds as well.

Doubt it's FR either. Real-world transfers would have been faster unless it was programmed to use RAM only during benchmarking.

EDIT
http://www.avsforum.com/t/1461478/what-kind-of-speeds-do-you-guys-get-on-your-flexraid-pool#post_23040330
Edited by amarshonarbangla - 3/4/13 at 3:05pm
post #701 of 1049
Thread Starter 
I think it uses RAM as a cache (flexraid) which gives faster benchmarks. You'll notice they slow down on the larger tests when it runs out.
post #702 of 1049
Quote:
Originally Posted by Mfusick View Post

I think it uses RAM as a cache (flexraid) which gives faster benchmarks. You'll notice they slow down on the larger tests when it runs out.

If it ran out of memory in the larger tests, the smaller test should have been faster. It doesn't run out but it is using RAM somehow to produce bogus numbers.
post #703 of 1049
Thread Starter 
I believe it is a "pre fetch" feature designed to improve performance of your flexraid pool. The side effect is it tricks ATTO into bogus benchmark numbers. It's certainly not a problem or something I would worry much about. Interesting find though.
post #704 of 1049
Quote:
Originally Posted by Mfusick View Post

I believe it is a "pre fetch" feature designed to improve performance of your flexraid pool. The side effect is it tricks ATTO into bogus benchmark numbers. It's certainly not a problem or something I would worry much about. Interesting find though.

Pre-fetching shouldn't cause such massive surges in speed.
post #705 of 1049
Thread Starter 
post #706 of 1049
Quote:

Not sure how it's related to FlexRAID producing weird numbers. Interesting read though, yes.
post #707 of 1049
Thread Starter 
Lol. I was not talking about the flexraid pool anymore. I think that is just some odd thing. I'm not worried about explaining it. I doubt it matters. If the pool works fine then it does matter.
post #708 of 1049
Quote:
Originally Posted by amarshonarbangla View Post

Pre-fetching shouldn't cause such massive surges in speed.

Exactly. FlexRAID cant read the file faster than the drive can serve it up.
post #709 of 1049
Thread Starter 
I think it stalls the benchmark until it reads some info then dumps it. It takes the same amount of time but the bench start is delayed causing overstated speed.
post #710 of 1049
Thread Starter 
post #711 of 1049
Why a Z77 board if I may ask?
post #712 of 1049
Thread Starter 
Quote:
Originally Posted by amarshonarbangla View Post

Why a Z77 board if I may ask?

Just his preference. I originally suggested a h77 or b75 ATX pro 3 for $79. But on a $2000 server build I guess he'd rather just spend the small amount on the z77. It was the most appropriate z77 with 8 SATA ports.


I actually have a z77 AsRock in my server too. Also in my HTPC. But mine is extreme 3 with only 6 SATA ports.

I'm going dual x8 cards though; 16 +4=20 and then a SATA 3 intel port on z77 for OS SSD. One free for skim line optical if I needed it.

I think if your not going dual SATA cards quickly its much easier to get a 8 port mobo. Two ports is usually 6 more TB of storage.
post #713 of 1049
There are H77 mobos that has 8 SATA ports also smile.gif
post #714 of 1049
Thread Starter 
I know wink.gif That was my first recommendation but he wanted the better Z77 and was not concerned with the small difference in cost.
post #715 of 1049
Is he going to run FlexRAID too?
post #716 of 1049
Thread Starter 
yup biggrin.gif
post #717 of 1049
Kewl
post #718 of 1049
Quote:
Originally Posted by Mfusick View Post

Flexraid still runs a free trial right ???

Yes, 14 days.
post #719 of 1049
Thread Starter 
Anyone know a good slimline Bluray reader for a Norco bay ?
post #720 of 1049
Quote:
Originally Posted by Mfusick View Post

Anyone know a good slimline Bluray reader for a Norco bay ?

Skip the optical drive in the Norco, unless you rip directly on the server. Less heat, less cost, one more Sata available to you through eSata...
I have a Norco 4020 and the only time I needed optical was when I installed the OS, from an external DVD player. I rip from a client machine.

One more thought : if you don't have an external DVD player handy, nothing prevents you from using a full size DVD player on an "open case" server while you install the base OS, then close the cover...
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Home Theater Computers
AVS › AVS Forum › Video Components › Home Theater Computers › Planning to rebuild my 20TB WHS Flexraid server: Information requested.