I have a low read and write speed for my array (running 4.7).  It doesn't peak above 11MB/s for reads and 8MB/s for writes (no cache drive).  When reading and writing, speeds will drop and fluctuate between the peaks and lows around 1-1.5MB/s.

 

I had a problem with one drive (it was 28MB/s in the unMenu user script speed test: hdparm -t), but I replaced the SATA cable and the drive speed test went back up to over 100MB/s.   Regardless of fixing this, the speeds are still poor.

 

Attached is my syslog, and below is a speed test I just did.  The three drives that are under 100MB/s are older Hitachi 500GB 5400rpm drives.

 

-----------------------------------------------------------------------

 

/dev/hdc:

Timing cached reads:   1298 MB in  2.00 seconds = 648.66 MB/sec

Timing buffered disk reads:  240 MB in  3.01 seconds =  79.79 MB/sec

 

/dev/hdd:

Timing cached reads:   1382 MB in  2.00 seconds = 691.25 MB/sec

Timing buffered disk reads:  334 MB in  3.01 seconds = 111.14 MB/sec

 

/dev/sda:

Timing cached reads:   1306 MB in  2.00 seconds = 652.91 MB/sec

Timing buffered disk reads:  238 MB in  3.02 seconds =  78.91 MB/sec

 

/dev/sdb:

Timing cached reads:   1346 MB in  2.00 seconds = 673.52 MB/sec

Timing buffered disk reads:  250 MB in  3.02 seconds =  82.71 MB/sec

 

/dev/sdc:

Timing cached reads:   1338 MB in  2.00 seconds = 668.83 MB/sec

Timing buffered disk reads:  362 MB in  3.01 seconds = 120.13 MB/sec

 

/dev/sdd:

Timing cached reads:   1362 MB in  2.00 seconds = 681.16 MB/sec

Timing buffered disk reads:  354 MB in  3.00 seconds = 117.87 MB/sec

 

/dev/sde:

Timing cached reads:   1274 MB in  2.00 seconds = 637.55 MB/sec

Timing buffered disk reads:  326 MB in  3.00 seconds = 108.61 MB/sec

 

/dev/sdf:

Timing cached reads:   1306 MB in  2.00 seconds = 653.16 MB/sec

Timing buffered disk reads:  314 MB in  3.01 seconds = 104.39 MB/sec

 

/dev/sdg:

Timing cached reads:   1262 MB in  2.00 seconds = 631.29 MB/sec

Timing buffered disk reads:  360 MB in  3.01 seconds = 119.66 MB/sec

 

/dev/sdh:

Timing cached reads:   1312 MB in  2.00 seconds = 656.04 MB/sec

Timing buffered disk reads:  322 MB in  3.01 seconds = 106.84 MB/sec

syslog-2011-06-14-1.txt

give us a hardware breakdown of the pieces and parts that are running in your server.

 

Also, what kind of router are you connecting to the unRAID machine.  the 11MB/s you are seeing would be peak for a non GB connection.

give us a hardware breakdown of the pieces and parts that are running in your server.

 

Also, what kind of router are you connecting to the unRAID machine.  the 11MB/s you are seeing would be peak for a non GB connection.

 

Forgot to mention that it's reporting as connecting at 1000Mb speed:

 

NIC info (from ethtool)

 

Settings for eth0:

Supported ports: [ TP MII ]

Supported link modes:  10baseT/Half 10baseT/Full

                        100baseT/Half 100baseT/Full

                        1000baseT/Half 1000baseT/Full

Supports auto-negotiation: Yes

Advertised link modes:  10baseT/Half 10baseT/Full

                        100baseT/Half 100baseT/Full

                        1000baseT/Half 1000baseT/Full

Advertised auto-negotiation: Yes

Speed: 1000Mb/s

Duplex: Full

Port: MII

PHYAD: 0

Transceiver: internal

Auto-negotiation: on

Supports Wake-on: pumbg

Wake-on: g

Current message level: 0x00000033 (51)

Link detected: yes

 

NIC driver info (from ethtool -i)

 

driver: r8169

version: 2.3LK-NAPI

firmware-version:

bus-info: 0000:03:00.0

 

Ethernet config info (from ifconfig)

 

eth0      Link encap:Ethernet  HWaddr 00:1f:d0:56:75:bb 

          inet addr:192.168.2.102  Bcast:192.168.2.255  Mask:255.255.255.0

          UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:3133799 errors:0 dropped:0 overruns:0 frame:0

          TX packets:7710681 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:3000727060 (2.7 GiB)  TX bytes:2093435804 (1.9 GiB)

          Interrupt:27 Base address:0xc000

 

And the router indicator lights also verify the connection speed at 1000Mb/s.

I am having a similar issues in this thread http://lime-technology.com/forum/index.php?topic=13448.15.

 

I have noticed that it is only my Windows Machines and PBO that are having the slow speeds. 

 

Have you tried yours with a OSX or Linux?

I am having a similar issues in this thread http://lime-technology.com/forum/index.php?topic=13448.15.

 

I have noticed that it is only my Windows Machines and PBO that are having the slow speeds. 

 

Have you tried yours with a OSX or Linux?

 

I have the same problem with my Macbook Pro (wired gigabit) and 2 Windows machines (using Teracopy).

Ok at least you ruled out the OS

 

Have you ever had it run at faster speeds?

give us a hardware breakdown of the pieces and parts that are running in your server.

 

Motherboard is GA-MA78GM-DS2H (4 SATA ports populated):

http://www.gigabyte.com/products/product-page.aspx?pid=2902#ov

 

Rosewill PCI-E card in the 16x slot (Marvell 88SX7042 chipset, 4 SATA ports populated):

http://www.rosewill.com/products/1128/productDetail.htm

 

Promise TX4 SATA PCI card (2 ports populated, using 2 of the slow Hitachi drives)

 

Hard Drives (HPA turned off in Bios):

2TB Seagate Barracuda LP (parity)

3x Hitachi 500GB 7200rpm

2x Samsung F1 1TB 7200rpm

1TB Western Digital Caviar Blue 7200rpm

640GB Western Digital Caviar Blue 7200rpm

Seagate Barracuda 7200.12 1TB

Western Digital SE16 7200rpm 500GB

Western Digital Green 2TB

 

Antec 850W Signature power supply

Antec P180 case

2x 5.25" drive bays that give an extra 5 spaces for 3.5" drives total (1 gives 4 spaces, 1 gives 1)

 

I have a m0n0wall PC based router, but all the computers in my house are connected between 2 Trendnet 8-port gigabit switches.  I am able to copy quickly between other PCs in my house via the same network.  I also tried swapping the network cables between computers that are known to copy fast and the server.  They are all Cat6 cables.

Ok at least you ruled out the OS

 

Have you ever had it run at faster speeds?

 

Yea I used to, but I never really paid too much attention to speeds in terms of MB/s before.  I just remember it being a lot faster to copy tv shows from the server to my laptop... a big noticeable change in speed, it was at least 3 times faster before.

I am running a parity check and it's at 25MB/s, seems slow to me.

 

Do you think I would get a significant change in speed if I changed from the Promise TX4 SATA150 PCI card to a Si3132 PCIe 1x card?  I have 2 drives hooked up to the Promise card right now.  I'm wondering if that card is the bottleneck.