Hi,
I got 4 new SATA disks (WD Green, 1TB, WD10EADS) I want to use to replace
my old 250GB disks attached to my 3ware controller.
I want to reuse the old 250GB disks in some systems running old PATA disks
ight now as system drives. So what I did now was gathering SATA performance
tatistics with the new 1TB drive to just find out what would be the maximum
performance I would get out of these disks to compare them later with my
3ware when they are configured as RAID-5.
A colleague of mine has the same disks in a new Nvidia Atom 330 system and
he told me that he reaches around 70MB/sec write speed with a single large
file on a single disk running linux 2.6.
I hooked the disk up to my client:
FreeBSD 7.2-STABLE #0: Tue Jul 28 12:59:47 CEST 2009
CPU: AMD Athlon(tm) 64 Processor 3500+ (2200.10-MHz K8-class CPU)
usable memory = 2138615808 (2039 MB)
atapci0: <VIA 6420 SATA150 controller> port
0xd000-0xd007,0xc800-0xc803,0xc400-0xc407,0xc000-0xc003,0xb800-0xb80f,0xb400
-0xb4ff irq 20 at device 15.0 on pci0
ad4: 953869MB <WDC WD10EADS-00L5B1 01.01A01> at ata2-master SATA150
because the on-board controller is a VIA 6420 I had to set the SATA150
Jumper on the harddisk to have the controller detect the drive.
On FreeBSD I used gpart+gpt to create a 1TB partition and then simply ran
newfs /dev/ad4p1 and mounted the new filesystem afterwards.
I then ran a dd in=/dev/zero of=/mnt/tmp/test.dd bs=1M count=4069 and dd
reported me a write speed of around 25MB/sec. This made me feel kinda bad
so I gave bonnie++ a try. The result was:
Version 1.96 ------Sequential Output------ --Sequential Input-
--Random-
Concurrency 1 -Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec
%CP
kartoffel.salats 4G 548 96 28924 3 14617 2 1141 96 36869 3 199.7
2
Latency 167ms 71702us 1759ms 23957us 75351us 2286ms
Version 1.96 ------Sequential Create------ --------Random
Create--------
kartoffel.salatschu -Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec
%CP
16 552 1 +++++ +++ 1486 2 531 1 +++++ +++ 1278 1
Latency 91403us 156us 28424us 22901us 87us 22820us
1.96,1.96,kartoffel.salatschuessel.net,1,1254282805,4G,,548,96,28924,3,14617
,2,1141,96,36869,3,199.7,2,16,,,,,552,1,+++++,+++,1486,2,531,1,+++++,+++,127
8,1,167ms,71702us,1759ms,23957us,75351us,2286ms,91403us,156us,28424us,22901u
s,87us,22820us
This also did not look that good comparing to the bonnie output the
colleague gave me from his shiny new ION system.
I then booted the latest knoppix (Also a 2.6.whatever linux kernel),
created a filesystem on /dev/sd1a (mkfs.ext3 /dev/sd1a) and mounted the
filesystem as well. The same dd I ran on FreeBSD I also ran on Knoppix
and this gave me 57.3MB/sec (wow compared to 25MB/sec). I then also
started bonnie++ just to see that this one is also much better:
Version 1.96 ------Sequential Output------ --Sequential Input-
--Random-
Concurrency 1 -Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec
%CP
Microknoppix 4G 305 99 55905 18 31896 9 959 98 80414 10 211.7
3
Latency 28579us 1075ms 1046ms 26376us 20962us 272ms
Version 1.96 ------Sequential Create------ --------Random
Create--------
Microknoppix -Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec
%CP
16 27135 59 +++++ +++ +++++ +++ 29369 62 +++++ +++ +++++
+++
Latency 23535us 9969us 9927us 11680us 1182us 9985us
1.96,1.96,Microknoppix,1,1254262392,4G,,305,99,55905,18,31896,9,959,98,80414
,10,211.7,3,16,,,,,27135,59,+++++,+++,+++++,+++,29369,62,+++++,+++,+++++,+++
,28579us,1075ms,1046ms,26376us,20962us,272ms,23535us,9969us,9927us,11680us,1
182us,9985us
Does anyone know if there is something I can tune on FreeBSD to get more
speed? hw.ata.wc is enabled of course.
hw.ata.wc: 1
hw.ata.atapi_dma: 1
hw.ata.ata_dma_check_80pin: 1
hw.ata.ata_dma: 1
I'll retest both setups with a plugged in Promise SATA300 PCI controller
but I doubt that it will get faster. I tried the controller before, and
on an dual PIII-850 system with L440GX chipset and 2GB of RAM the
controller gave me around 40MB/sec on write and on my amd64 system I also
only got around 25MB/sec (even this makes no sense to me why my old PIII
is faster then my much newer amd64) but I'll come back with better
numbers for this controller later.