Data Center Tiers Explained

• Tier 1: composed of a single path for power and cooling distribution, without redundant components, providing 99.671% availability.
• Tier II: composed of a single path for power and cooling distribution, with redundant components, providing 99.741% availability
• Tier III: composed of multiple active power and cooling distribution paths, but only one path active, has redundant components, and is concurrently maintainable, providing 99.982% availability
• Tier IV: composed of multiple active power and cooling distribution paths, has redundant components, and is fault tolerant, providing 99.995% availability.

Recommended Data Center Temperature & Humidity

Temperature range:Expansion of the recommended data center temperature range, which should be taken at the server inlets. They should now be 18 degrees Celsius to 27 degrees (64.4 degrees Fahrenheit to 80.6 degrees), expanded from 20 degrees to 25 degrees (68 degrees Fahrenheit to 77 degrees).

Humidity levels: Data center humidity levels should now be measured by dew point and fall within 5.5 degrees Celsius to 15 degrees (41.9 degrees Fahrenheit to 59 degrees). The previous range was narrower and measured by relative humidity, which ASHRAE decided wasn't as accurate a metric as dew point

Remote monitoring Sun Systems using ipmitool

The open-source tools ipmitool can be used to help manage and monitor Sun via the IPMI.

 

 

Chasis Status

# ipmitool -I lan -U root -H 192.168.1.5chassis status

 

Change Password

# ipmitool -I lanplus -H <IP Address> -U root -P <oldpassword> user set password 2 <newpassword>

 

Managing the System Event Log

Use ipmitool's sel elist command to print out the contents of the System Event Log

# ipmitool -I lan -H 192.168.1.5-U root sel elist

 

If the System Event Log contains a large number of entries, the last modifier can be used with the sel elist subcommand to show only a specific number of the most recent events.

# ipmitool -I lan -H 192.168.1.5-U root sel elist last 2

 

Clear the System Event Log

# ipmitool -I lan -H 192.168.1.5-U root sel clear

 

Use the led get command to display the state of the LED lights on a system

# ipmitool -I lan -H 192.168.1.5-U root sunoem led get

 

Use the sdr command to display sensor values

# ipmitool -I lan -H 192.168.1.5-U root sdr type voltage

 

Display the Service Processor's network configuration

# ipmitool -I lan -H 192.168.1.5-U root lan print 1

 

Print a list of all Field Replaceable Unit (FRU) inventory data

# ipmitool -I lan _H 192.168.1.5-U root fru print

 

Use the restart_cause command to display the cause of the last system restart

# ipmitool -I lan -H 192.168.1.5-U root chassis restart_cause

 

Perform a hard reset of a remote system

# ipmitool -I lan -H 192.168.1.5-U root chassis power reset

 

Request a PXE boot on the next reboot

# ipmitool -I lan -H 192.168.1.5-U root chassis bootdev pxe

 

Some more….

 

Run the following against the Ilom:

ipmitool -I lan -H <ILOM IP address> -U <ILOM Username> bmc info
ipmitool -I lan -H <ILOM IP address> -U <ILOM Username> sel elist
ipmitool -I lan -H <ILOM IP address> -U <ILOM Username> fru
ipmitool -I lan -H <ILOM IP address> -U <ILOM Username> sensor
ipmitool -I lan -H <ILOM IP address> -U <ILOM Username> sunoem led get all

ipmitool -I lan -H <ILOM IP address> -U <ILOM Username> sunoem sbled get all

ipmitool -I lan -H <ILOM IP address> -U <ILOM Username> sdr elist
ipmitool -I lan -H <ILOM IP address> -U <ILOM Username> sdr elist full
ipmitool -I lan -H <ILOM IP address> -U <ILOM Username> sdr elist all
ipmitool -I lan -H <ILOM IP address> -U <ILOM Username> chassis status

 

 

 

 

When data center cabling becomes art

Ref: http://royal.pingdom.com/2008/01/24/when-data-center-cabling-becomes-art/

Courtesy of Digital:Slurp.
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Courtesy of ChrisDag.
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Courtesy of mbm3290. Swedish colors! How could we NOT include it?
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Courtesy of mmayo.
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Courtesy of Jef Newsom.
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Courtesy of Precision Fiber Optics.
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Courtesy of tim d.
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Courtesy of Network1 Cabling. (We're not sure this is practical or not, but it LOOKS impressive…)