Raid 5 speed on intel H87

[Mads-Ejnar]

Hallo :)

 

I have build a small HTPC/file server.

 

MB: Asus H87I-Plus

CPU: I5-4570T

Ram: Kingston 2x4GB 1600MHz

HDD: 3x3TB WD RED

OS HDD: Seagate XT 320gb

 

I have make a Raid 5 with the 3 WD Drive.

The stribe size is 64KBs

 

Read speed 280-290MBs

Write speed 50-60MBs

 

Is that normal or whats wrong with the write speed? 

I thing is really slow and i know i have to make a Calculation on all the data but i have hope on write speed of 150MBs

 

The cpu only use 2-5% when i write data to the raid.
What can i do to get a better write speed or do i really need cache for this?

 

I dont like cache becurse then i need a UPS so i not lose any data.

 

Is there some one that know about raid i can tell what i can try or is 60MBs write speed okey?
 

 

 

 

[andi1455]

The problem is the built in raid controller on the h87 chipset. 

 

For raid5 the controller makes parity calculation for one drive and if you don`t have a high end dedicated raid card, the write speeds will be a little bit slow, like in your case. 

[Mads-Ejnar]

so 50-60mbs is okey ?

i will like to have better but most of the time im reading from the drive so maybe okey :)
 

Thanks for your replay :) 

[charlie2k]

Hi Mads-Ejnar,

 

I'm planing a very simular system (same CPU, board and WD Red's). Can you tell me which power supply you use and how the idle consumption looks like (watt)?

 

Thanks...

[montago]

I have the same motherboard and almost the same cpu (4570) .. I tried the same with 3x WD 3TB Green

Raid5: 300MB/s read and 200MB/s write

Raid0: 400MB/s read and 350MB/s write

Green and Red are almost identical...

How did you make the raid ?, in Windows or in the controller ?

[montago]

Hallo

 

I have build a small HTPC/file server.

 

MB: Asus H87I-Plus

CPU: I5-4570T

Ram: Kingston 2x4GB 1600MHz

HDD: 3x3TB WD RED

OS HDD: Seagate XT 320gb

 

I have make a Raid 5 with the 3 WD Drive.

The stribe size is 64KBs

 

Read speed 280-290MBs

Write speed 50-60MBs

 

Is that normal or whats wrong with the write speed? 

I thing is really slow and i know i have to make a Calculation on all the data but i have hope on write speed of 150MBs

 

The cpu only use 2-5% when i write data to the raid.

What can i do to get a better write speed or do i really need cache for this?

 

I dont like cache becurse then i need a UPS so i not lose any data.

 

Is there some one that know about raid i can tell what i can try or is 60MBs write speed okey?

 

 

You need to enable WriteBack Cache... in Intel RST... then you will be able to write with 250 MB/s 

[Mads-Ejnar]

But i dont have a UPS and with WriteBack Cache on and the Power goes out i will lose data. So i dont want to use Cache without a UPS

[montago]

You worry too much...

I've run on this setup for 2 months with 4 virtual machines on the system.. no problems so far.. and I've crashed it 3 times