HP Pro 3505 GPT Hard Disk Drives for HP Business Desktops
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HP Pro 3505 manual content summary:
- HP Pro 3505 | GPT Hard Disk Drives for HP Business Desktops - Page 1
system, a hard disk drive (HDD) must first be partitioned. Partitioning is done at the drive level and for many decades used the Master Boot Record (MBR) partition method. A new method called GUID OS, BIOS, driver, and SW tool support needed to successfully implement GPT drives in desktop systems. - HP Pro 3505 | GPT Hard Disk Drives for HP Business Desktops - Page 2
UEFI BIOS and UEFI-aware OS. GPT vs MBR There are a number of differences between MBR and GPT. Some of the key differences include the following: • MBR only supports 4 primary partition table entries while GPT supports 128 primary partitions with current Microsoft Windows™ operating systems. • MBR - HP Pro 3505 | GPT Hard Disk Drives for HP Business Desktops - Page 3
Primary GPT Protects MBR-based disk utilities from overwriting GPT drives Defines usable blocks on the disk List of drive partition entries (up to 128) Drive partitions (up to 128) LBA 0 LBA 1 LBA 2 LBA 3 Protective MBR Primary GPT Header Entries 1 thru 4 Entries 5 - 128 LBA 34 Partition 1 - HP Pro 3505 | GPT Hard Disk Drives for HP Business Desktops - Page 4
have a "UEFI aware" OS such as Microsoft Windows 7 ™64-bit. For selected desktops, HP implements the Type 0 BIOS Information data structure (as described in version 2.7 of the SMBIOS specification) to indicate UEFI BIOS support. The BIOS Characteristics Extension Bytes field within this structure - HP Pro 3505 | GPT Hard Disk Drives for HP Business Desktops - Page 5
Extension Byte 2 Bit Position Description 0 When set, BIOS boot specification is supported 1 When set, function key-initiated Network Service boot is supported. When function key-initiated Network Service boot is not supported, a network option ROM may choose to offer this functionality on - HP Pro 3505 | GPT Hard Disk Drives for HP Business Desktops - Page 6
). Table 2 summarizes current OS support for HP Desktops. Table 2. Summary of OS support for GPT drives by HP Desktops Operating system GPT Boot Support? GPT Data Storage Support? Windows 7™ SP1 64-bit Yes (requires UEFI BIOS) Yes Windows 7™ SP1 32-bit No Yes Windows Vista™ SP1 64-bit Yes - HP Pro 3505 | GPT Hard Disk Drives for HP Business Desktops - Page 7
HP UEFI BIOS system Drive Encryption For Opal-based SED (Self Encrypting Drive) hard drives, UEFI protocol definitions and usage for SED are part of the UEFI v2.3.1 Spec published in Feb 2011. To ensure proper operation of Opal-based SED drives with GPT formatting, users will need to use UEFI BIOS - HP Pro 3505 | GPT Hard Disk Drives for HP Business Desktops - Page 8
such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. Intel is a trademark of Intel Corporation in the U.S. and other countries. Microsoft and Windows are
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GPT hard Disk Drives
For HP Desktops
April 2011
Table of Contents:
Abstract
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1
Why GPT?
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1
GPT vs MBR
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2
Bootable vs Data Drives and UEFI BIOS
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4
OS Support
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6
Storage Driver Support
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6
Imaging Tool Support for GPT
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7
Drive Encryption
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7
Summary
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8
For more information
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8
Abstract
In order to be used in a computer system, a hard disk drive (HDD) must first be
partitioned. Partitioning is done at the drive level and for many decades used the
Master Boot Record (MBR) partition method. A new method called GUID Partition
Table (GPT)) is now used for large-capacity drives. GPT allows for volume sizes
much greater than 2.19TB, and therefore must be used on drives larger than the
MBR limit of 2.19TB. This white paper describes the rationale for GPT and the types
of OS, BIOS, driver, and SW tool support needed to successfully implement GPT
drives in desktop systems.
Why GPT?
HDD areal density (bits/sq in) and tracks per inch (TPI) continue to steadily
increase. For 2010, many typical desktop 3.5” hard drives have areal densities
and TPI that permit capacities up to 500GB per platter. In 2011, it is expected that
improvements in areal density and TPI will allow drive manufacturers to begin
shipping drives that have capacities of1TB/platter. At this density, drives of 2TB
and 3TB capacities become more easily producible and hence cheaper and more
widely available.