HP Pro 3305 GPT Hard Disk Drives for HP Business Desktops
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- HP Pro 3305 | 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 Record (MBR) partition method. A new method called GUID Partition Table (GPT)) is now used for large-capacity - HP Pro 3305 | GPT Hard Disk Drives for HP Business Desktops - Page 2
the overall Unified Extensible Firmware Interface (UEFI) specification, allows for much larger hard drives than with or 512 byte sector emulation, this means an MBR disk supports 2^32 bit LBAs multiplied by 512 bytes/sectors = the header and one for the partition table. Figure 1 on the following - HP Pro 3305 | 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 3305 | GPT Hard Disk Drives for HP Business Desktops - Page 4
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 has defined - HP Pro 3305 | GPT Hard Disk Drives for HP Business Desktops - Page 5
data is useful in identifying the computer for targeted delivery of model-specific software and firmware content through third-party content distribution services. 3 When set, UEFI specification is supported. 4 When set, the SMBIOS table describes a virtual machine. When cleared, no inference - HP Pro 3305 | GPT Hard Disk Drives for HP Business Desktops - Page 6
Windows Vista™ SP1 32-bit No Yes Linux™ No direct support from HP No direct support from HP Storage Driver Support Since GPT drives have capacities beyond 2.2TB, support is required through updated storage drivers. Storage driver support can be provided with certain newer operating systems' AHCI - HP Pro 3305 | GPT Hard Disk Drives for HP Business Desktops - Page 7
will need to be manually selected to install in MBR 5. Figure 5. BIOs menu of HP UEFI BIOS system Drive Encryption For problem. Other drive encryption tools, such as McAfee Endpoint™ software encryption tools, may or may not have specific GPT support at this point. Consult the particular software - HP Pro 3305 | GPT Hard Disk Drives for HP Business Desktops - Page 8
GPT, partition and formatting support of ever-increasing drive sizes : For the UEFI specification, go to the 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.