Register for the iXsystems Community to get an ad-free experience and exclusive discounts in our eBay Store.

Another bad performace raidz thread.

Status
Not open for further replies.

image132

Junior Member
Joined
Apr 23, 2012
Messages
19
Specs:

CPU: Intel core 2 duo E6700 2.66Ghz
RAM: 2gb ddr2
HDD: 4X2TB in raid-z
Using onboard sata.


I'm getting about 50mb/s write and 60mb/s read. I'm pretty unhappy with that as I did some testing before buying the hdd's with the same setup, same setting except the hdds I used were 2X250gb and 1X320 all in raid-z. One of the 250gb was an ide drive. With the test setup I was getting 90-100 mb/s throughput. Freenas is servicing windows 7 machines. I've enable large RW and AIO, I'm even copying the same 42gb file for both setups.

Anyone know why there is a massive difference in performance? Any advice on setting I can change? I find it hard to believe newer 64mb cache drivers are slower than a IDE 16mb cache drive.

Any help would be appreciated.
 

ProtoSD

Dedicated Sage
Joined
Jul 1, 2011
Messages
3,353
Look in one of the OTHER bad performance threads ;) The settings have been posted several times. Also try turning off AIO.
 

image132

Junior Member
Joined
Apr 23, 2012
Messages
19
I have looked through lots but many don't seem to be relevant. Also turning off AIO did nothing.
 

Hexland

Member
Joined
Jan 17, 2012
Messages
110
To begin, 2Gb RAM is too small. 4Gb is a recommended minimum to start with.

Also, make sure that your new 2Tb drives are not advanced format... if they are, ensure that when you format them - you use the 4K formatting option. My read/write speed was about 1/8th because one of the drives in my pool was a WD-EARS drive until I changed the formatting.
 
Status
Not open for further replies.
Top