HP Pro 3330 GPT Hard Disk Drives for HP Business Desktops
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- HP Pro 3330 | GPT Hard Disk Drives for HP Business Desktops - Page 1
HP Desktops April 2011 Table of Contents: Abstract ...1 Why GPT?...1 GPT vs MBR ...2 Bootable vs Data Drives and UEFI BIOS 4 OS Support ...6 Storage Driver Support 6 Imaging Tool Support for GPT 7 Drive Encryption 7 Summary ...8 For more information 8 Abstract In order to be used in a computer - HP Pro 3330 | GPT Hard Disk Drives for HP Business Desktops - Page 2
uses 64-bit values to indicate the starting offset and length of a partition, a GPT disk can theoretically support up to 2^64 LBAs. Assuming 512 byte sectors or 512 byte sector emulation, this means the maximum capacity of a GPT disk = 9.4 x 10^21 bytes = 9.4 zettabytes (ZB). Microsoft Windows™ file - HP Pro 3330 | 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 3330 | GPT Hard Disk Drives for HP Business Desktops - Page 4
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 has defined a bit that, if set - HP Pro 3330 | GPT Hard Disk Drives for HP Business Desktops - Page 5
Byte 2 specifies UEFI specification support. Table 1. BIOS Characteristics 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 - HP Pro 3330 | GPT Hard Disk Drives for HP Business Desktops - Page 6
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 (requires UEFI BIOS) Yes Windows Vista - HP Pro 3330 | GPT Hard Disk Drives for HP Business Desktops - Page 7
. The user will need to check the particular tool documentation to ensure the software provides support for GPT. A certain percentage of users may choose to re-install the 64-bit OS with a Microsoft DVD. On machines with UEFI BIOS, the DVD setup utility may try to install the image in GPT format by - HP Pro 3330 | GPT Hard Disk Drives for HP Business Desktops - Page 8
UEFI-based system. With GPT, partition and formatting support of ever-increasing drive sizes is assured for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP
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GPT hard Disk Drives
For HP Desktops
April 2011
Table of Contents:
Abstract
..............................................................................................................
1
Why GPT?
...........................................................................................................
1
GPT vs MBR
........................................................................................................
2
Bootable vs Data Drives and UEFI BIOS
................................................................
4
OS Support
.........................................................................................................
6
Storage Driver Support
........................................................................................
6
Imaging Tool Support for GPT
..............................................................................
7
Drive Encryption
..................................................................................................
7
Summary
............................................................................................................
8
For more information
..........................................................................................
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.