HP ProLiant BL660c ISS Technology Focus, Number 12 - Page 3

the MBR partitioning scheme. LBA 0, called the Master Boot Record MBR

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30% more energy than the IT equipment consumes. Let's estimate the energy savings of the EcoPOD compared to a traditional data center with a PUE of 2.4. The energy cost for a traditional data center with a1.26 MW IT load (1.76 MW facility load) is approximately $1.54 million per year based on 10 cents per kilowatt-hour (kW-Hr). At the same IT load but with a facility load ranging from 0.063 MW (PUE=1.05) to 0.378 MW (PUE=1.3), the energy costs of the EcoPOD ranges from $55,200 to $331,000 per year. This translates to energy savings between $1.48 million and $1.21million per year. For more information » HP Performance Optimized Datacenter 240a QuickSpecs » EcoPOD Interactive Demo Booting from high-capacity drives As drive capacities continue to expand, it has become important to understand the proper way to configure an OS boot drive when using highcapacity drives. Although you can configure non-boot data drives to virtually any capacity (with the addressability of 64-bit Logical Block Addresses (LBAs)), in some cases the capacity of the boot drive is limited to the addressability of 32-bit LBAs. How do you boot the OS? HP ProLiant servers HP ProLiant servers are legacy BIOS-based systems. The boot drive uses the MBR partitioning scheme. LBA 0, called the Master Boot Record (MBR), contains x86 boot code and an MBR partition table, which uses 32-bit fields for the starting LBA and the size(s) of a maximum of four partitions. This partitioning scheme can describe drives up to 2.2 TB (2 TiB). To boot an OS on a legacy BIOS-based system, you must designate one of the partitions as "Bootable." The system BIOS loads the contents of LBA 0 into memory and begins executing that code. The MBR code searches the MBR partition table for a partition marked "Bootable." The system BIOS loads the contents of the bootable partition's first LBA (called the volume boot record or VBR)) into memory and begins executing the VBR code. The VBR code understands the file system on the partition (for example, NTFS for Microsoft Windows, ext4 for Linux) and bootstraps the OS. HP Integrity servers HP Integrity servers are Unified Extensible Firmware Interface (UEFI)-based systems. The boot drive uses the GPT partitioning scheme. LBAs 1 through 33 contain the GPT partition table, which uses 64-bit fields for the start and end LBAs of a virtually unlimited list of partitions. The GPT partitioning scheme does not have a boot drive limitation. But some OSes do not support booting from GPT drives.

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30% more energy than the IT equipment consumes.
Let’s estimate the energy savings of the EcoPOD compared to a traditional
data center with a PUE of 2.4. The energy cost for a traditional data center
with a1.26 MW IT load (1.76 MW facility load) is approximately $1.54 million
per year based on 10 cents per kilowatt-hour (kW-Hr). At the same IT load
but with a facility load ranging from 0.063 MW (PUE=1.05) to 0.378 MW
(PUE=1.3), the energy costs of the EcoPOD ranges from $55,200 to
$331,000 per year. This translates to energy savings between $1.48 million
and $1.21million per year.
For more information
»
HP Performance Optimized Datacenter 240a QuickSpecs
»
EcoPOD Interactive Demo
Booting from high-capacity drives
As drive capacities continue to expand, it has become important to
understand the proper way to configure an OS boot drive when using high-
capacity drives. Although you can configure non-boot data drives to virtually
any capacity (with the addressability of 64-bit Logical Block Addresses
(LBAs)), in some cases the capacity of the boot drive is limited to the
addressability of 32-bit LBAs.
How do you boot the OS?
HP ProLiant servers
HP ProLiant servers are legacy BIOS-based systems. The boot drive uses
the MBR partitioning scheme. LBA 0, called the Master Boot Record (MBR),
contains x86 boot code and an MBR partition table, which uses 32-bit fields
for the starting LBA and the size(s) of a maximum of four partitions. This
partitioning scheme can describe drives up to 2.2 TB (2 TiB).
To boot an OS on a legacy BIOS-based system, you must designate one of
the partitions as “Bootable.” The system BIOS loads the contents of LBA 0
into memory and begins executing that code. The MBR code searches the
MBR partition table for a partition marked “Bootable.” The system BIOS
loads the contents of the bootable partition’s first LBA (called the volume
boot record or VBR)) into memory and begins executing the VBR code. The
VBR code understands the file system on the partition (for example, NTFS
for Microsoft Windows, ext4 for Linux) and bootstraps the OS.
HP Integrity servers
HP Integrity servers are Unified Extensible Firmware Interface (UEFI)-based
systems. The boot drive uses the GPT partitioning scheme. LBAs 1 through
33 contain the GPT partition table, which uses 64-bit fields for the start and
end LBAs of a virtually unlimited list of partitions. The GPT partitioning
scheme does not have a boot drive limitation. But some OSes do not
support booting from GPT drives.