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hider
 
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slow RAID-0 performance

Hey,

I have 2x 250gb WD Caviar SATA drives in RAID-0 using a 3ware 8006 2-port controller card.

I've setup the appropriate RAID-0 array and installed linux. The system shows that I've got 500gb, but my performance is slow as shit!

Quote:
perryh@perry-home:~$ sudo hdparm -Tt /dev/sdb

/dev/sdb:
Timing cached reads: 10072 MB in 2.00 seconds = 5039.78 MB/sec
Timing buffered disk reads: 296 MB in 3.02 seconds = 98.11 MB/sec
Quote:
perryh@perry-home:~$ lspci
00:00.0 Host bridge: Intel Corporation 82G33/G31/P35/P31 Express DRAM Controller (rev 02)
00:01.0 PCI bridge: Intel Corporation 82G33/G31/P35/P31 Express PCI Express Root Port (rev 02)
00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 02)
00:1a.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 02)
00:1a.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 02)
00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 02)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 02)
00:1c.3 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 4 (rev 02)
00:1c.4 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 (rev 02)
00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 02)
00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 92)
00:1f.0 ISA bridge: Intel Corporation 82801IB (ICH9) LPC Interface Controller (rev 02)
00:1f.2 IDE interface: Intel Corporation 82801IB (ICH9) 2 port SATA IDE Controller (rev 02)
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 02)
00:1f.5 IDE interface: Intel Corporation 82801I (ICH9 Family) 2 port SATA IDE Controller (rev 02)
01:00.0 VGA compatible controller: ATI Technologies Inc Barts XT [ATI Radeon HD 6800 Series]
01:00.1 Audio device: ATI Technologies Inc Barts HDMI Audio [Radeon HD 6800 Series]
03:00.0 IDE interface: JMicron Technology Corp. JMB368 IDE controller
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 01)
05:00.0 RAID bus controller: 3ware Inc 7xxx/8xxx-series PATA/SATA-RAID (rev 01)
Are these speeds normal? I did some quick googling and I should be getting 140mb/s...

thanks,

perry
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Last edited by hider; 05-31-2011 at 02:18 AM..
Old 05-31-2011, 02:12 AM hider is offline  
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troublemike84
 
Looks pretty slooooooow to me.
Old 06-23-2011, 12:38 PM troublemike84 is offline  
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Typhoon43
 
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Is that 140 you saw in Google in Windows or Linux?
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Old 06-23-2011, 12:39 PM Typhoon43 is offline  
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