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Drive pooling


Guest asrequested

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Happy2Play

is the difference down to the speed of the cpu's - intel vs AMD (old!) :)

 

I would guess the amount of data, 18TB vs 36TB.

 

Both seem to perform about the same for old technology.

http://cpuboss.com/cpus/Intel-Xeon-X3450-vs-AMD-Phenom-II-X4-955

Edited by Happy2Play
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PenkethBoy

i made a mistake and added lots of photo's to my "extrafanart" directories and that kills the scan speed went from a few minutes to over an hour  :o

 

also where the data is on a disc can have a large effect - fast on the outside edge and slow in the centre

 

DP is not raid so the speed you get is mainly down to the native speed of the disc

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Happy2Play

So in theory I should get better speeds if I had matching drive speeds.  I have a mix of Seagate, Western Digital, and Hitachi drives (5400, 5900, and 7200rpm).

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Guest asrequested

Seek times will definitely vary between those drives. All my pools have matching drives, especially my movie pool. For that pool they're all HGST 7200 rpm

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PenkethBoy

in Scanner from stable bit - if you have it installed - you can do a burst test on a drive to see how fast it is

 

or a better option would be HDTune which does a read test across all sectors and gives you a max and min - does take a few hours to run - although you can run multiple copies at the same time to test multiple drives

 

IIRC when i did this on my HGST 4tb drives it was 170 MB/s to 130 MB/s from outside to inside

 

Also size matters - bigger disk usually more buffer - so generally faster - have a Seagate Archive drive 8TB and that will do over 200MB/s

 

Faster drives also have better seek time so 7200 better than 5400 etc

 

And controllers will have an effect......

 

Happy - one thing to be careful of in the future as and when you move away from WHS to say win 10 - Rocket Raid controllers do not work well with Windows - had three 2720 and all they did was lock the system up with DP - driver/bios issues - this is with two different motherboards etc - very reproducible when put under load 

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Happy2Play

Don't really know know how useful the burst test really is.

SSD   461MB         off motherboard
5900  250MB 	    RR2720
7200  450-471MB	    RR2720  Depending on Manufacture

Drives on the RR2760 were 25-50MB slower.

Transfers from outside saturate my gigabit connection at 113MB and Pool to SSD about 137MB and SSD to Pool about 120MB.

 

@@PenkethBoy - Thanks for the warning for when I do upgrade.

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