Category Archives: Hardware

Debian Jumbo Frames

Posted on February 22, 2013 by Null

2 NAS servers both with 802.3ad bonded gigE nics based on the Realtek 8169 chip.
The highest MTU I could set was 7000 even though the D-Link DGS-1210-24 Rev. A switch can support up to 10k.

Below is just a single sample, but all tests stayed within 57x Mbits for MTU=1500 and 77xMbits for MTU=7000.

The important bits.
iperf was used for this testing.

MTU 1500:
[ 3] 0.0-10.0 sec 687 MBytes 576 Mbits/sec


MTU 7000:
[ 3] 0.0-10.0 sec 926 MBytes 777 Mbits/sec


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Barracuda Green ST2000DL003

Posted on February 11, 2013 by Null

http://www.seagate.com/files/staticfiles/support/docs/manual/desktop/Barracuda%20Green/100649225c.pdf

Reformatted a bit to fit on page.

I have 6 of these (2TB) in each NAS Raid5 setup plus motherboard, AMD cpus, RAM etc.
This page is for researching a replacement PSU.

—

2.8.1 Power consumption
Power requirements for the drives are listed in Table 2 on page 15. Typical power measurements are based on an average of drives tested, under nominal conditions, using 5.0V and 12.0V input voltage at 25°C ambient temperature.

• Spinup power Spinup power is measured from the time of power-on to the time that the drive spindle reaches operating speed.


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Debian Squeeze 802.3ad

Posted on November 30, 2011 by Null

Debian Lenny and Squeeze
2x Realtek 8169
1x Reaktek 8169, 1x nForce
D-Link DGS-1210-24 Rev. A

Testing:
iptraf
cat /proc/net/bonding/bond0






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Seagate ST32000542AS 2TB Setup

Posted on March 5, 2011 by Null

A lot of ST32000542AS drives come with the CC34 firmware. Apparently it has various known problems, one of which is an annoying click (click of death). The first thing you’ll want to do is upgrade the firmware to CC35. A Link to the instructions is in the references section below.

Once that is done, the next step, if it exists, is removing HPA from the drive.
You’ll know it has HPA enabled by running hparm. HPA results in less capacity and so it’s not a good thing in an array.

We’ll be using Debian 6.0 (squeeze).

hparm -N /dev/sdb


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