pantz.org banner
Areca 1160 raid card performance and testing
Posted on 10-11-2005 02:35:00 UTC | Updated on 10-11-2005 02:35:00 UTC
Section: /hardware/hostbusadapters/ | Permanent Link

The Areca line of SATA RAID cards seem to be the best I've found. All parity calculations are done on the cards dedicated processor and it does not used the systems processor in anyway. Other cheaper cards will do this like the Rocket Raid or Broadcom cards. You may get higher throughput but at the expense of high system processor usage. Areca card processors are also very fast compared to other SATA RAID cards that use a dedicated processor on card like 3ware. I found 3ware cards to be much slower in write speeds (like twice as slow) compared to the Areca line of cards.

The speeds I've seen with bonnie++ on the Areca 1160 (16 port) with 8 Seagate ST3400832AS and 8 Seagate ST3160023AS with native command queuing (NCQ) turned off is 254MB/s writes and 388MB/s reads. For some reason if you don't turn off NCQ the your read speeds go down the drain. We are not sure why this is but I think it's a problem with the Areca cards and have reported it to Areca. The ST3160023AS don't support NCQ but the ST3400832AS's do. Not sure if mixing NCQ and non-NCQ drives on the same controller are doing it but if you leave it on read speeds go down by 60% which is nuts.

The Areca card is a 64bit PCI-X 133/MHZ RAID card. It is in a 64bit PCI-X 133/MHZ slot. The machine is a dual 3.06 Xeon with 2G of ram. In a RAID 6 setup bonnie++ was run with the following line:

sync;bonnie++ -d /disk1/ -s:80g -mAreca1160 -r2048 -x1 -u root -f -b -n 2:10000000:1000000:64 >>Areca1160

80G was used so we would saturate all the ram in the system and get a better reading of the cards actual speed. Usually 40 times the systems ram is good. You can limit the systems memory by using a kernel option at boot. So the test is shorter and your sure you can saturate the RAM. Don't for get to turn the swap off (command is just "swapoff") also! The entry to limit the memory is below. The example was done with CentOS 4.1 and a GRUB boot menu:

title CentOS (2.6.9-11.106.unsupportedsmp) Raid Test Memory Limit 64M
root (hd0,0)
kernel /boot/vmlinuz-2.6.9-11.106.unsupportedsmp ro root=LABEL=/ mem=64M
initrd /boot/initrd-2.6.9-11.106.unsupportedsmp.img

Del.icio.us! | Digg Me! | Reddit!

Related stories


RSS Feed RSS feed logo
About


3com
3ware
alsa
alsactl
alsamixer
amd
android
apache
areca
arm
ati
auditd
awk
badblocks
bash
bind
bios
bonnie
cable
carp
cat5
cdrom
cellphone
centos
chart
chrome
cifs
cisco
cloudera
comcast
commands
comodo
compiz-fusion
corsair
cpufreq
cpufrequtils
cpuspeed
cron
crontab
crossover
cu
cups
cvs
database
dbus
dd
dd_rescue
ddclient
debian
decimal
dhclient
dhcp
diagnostic
diskexplorer
disks
dkim
dns
dos
dovecot
drac
dsniff
dvdauthor
e-mail
echo
editor
emerald
ethernet
expect
ext3
ext4
fat32
fedora
fetchmail
fiber
filesystems
firefox
firewall
flac
flexlm
floppy
flowtools
fonts
format
freebsd
ftp
gdm
gmail
gnome
greasemonkey
greylisting
growisofs
grub
hacking
hadoop
harddrive
hba
hex
hfsc
html
html5
http
https
idl
ie
ilo
intel
ios
iperf
ipmi
iptables
ipv6
irix
javascript
kde
kernel
kickstart
kmail
kprinter
krecord
kubuntu
kvm
lame
ldap
linux
logfile
lp
lpq
lpr
maradns
matlab
memory
mencoder
mhdd
mkinitrd
mkisofs
moinmoin
motherboard
mouse
movemail
mplayer
multitail
mutt
myodbc
mysql
mythtv
nagios
nameserver
netflix
netflow
nginx
nic
ntfs
ntp
nvidia
odbc
openbsd
openntpd
openoffice
openssh
openssl
openvpn
opteron
parted
partimage
patch
perl
pf
pfflowd
pfsync
photorec
php
pop3
pop3s
ports
postfix
power
procmail
proftpd
proxy
pulseaudio
putty
pxe
python
qemu
r-studio
raid
recovery
redhat
router
rpc
rsync
ruby
saltstack
samba
schedule
screen
scsi
seagate
seatools
sed
sendmail
sgi
shell
siw
smtp
snort
solaris
soundcard
sox
spam
spamd
spf
sql
sqlite
squid
srs
ssh
ssh.com
ssl
su
subnet
subversion
sudo
sun
supermicro
switches
symbols
syslinux
syslog
systemrescuecd
t1
tcpip
tcpwrappers
telnet
terminal
testdisk
tftp
thttpd
thunderbird
timezone
ting
tls
tools
tr
trac
tuning
tunnel
ubuntu
unbound
vi
vpn
wget
wiki
windows
windowsxp
wireless
wpa_supplicant
x
xauth
xfree86
xfs
xinearama
xmms
youtube
zdump
zeromq
zic
zlib