HP DC5000 4.5 Drive Capacities, File, Type, Drive, System, Partition, Controller, Maximum Size, Operating System, Operating System, Drive Manufacturers

Ultra ATA Drive Guidelines and Features

4.5 Drive Capacities

The combination of the file system and the operating system used in the computer determines the maximum usable size of a drive partition. A drive partition is the largest segment of a drive that may be properly accessed by the operating system. A single hard drive may therefore be subdivided into a number of unique drive partitions in order to make use of all of its space.

The table that follows identifies the capabilities and restrictions imposed on the computer by the combinations of file and operating systems.

Microsoft to Drive Manufacturer Size Conversion Table*

Drive Size as Identified by Microsoft	Drive Size as Identified by
Operating System	Drive Manufacturers
2 GB	2.1 GB
4 GB	4.3 GB
32 GB	34.4 GB
64 GB	68.7 GB
128 GB	137 GB
2 TB	2.199 TB

*Drive size calculations by drive manufacturers are bytes to the base 10 while calculations by Microsoft are bytes to the base 2.

Drive/Partition Capacity Limits

			Maximum Size
File	Controller
System	Type	Operating System	Partition	Drive
FAT 32	ATA	Windows 2000/ XP	32 GB	128 GB
FAT 32	SCSI	Windows 2000/ XP	32 GB	2 TB
NTFS	ATA	Windows NT/2000/XP	128 GB	128 GB
NTFS	SCSI	Windows NT/2000/XP	2TB	2TB

Service Reference Guide, dc5000 360201-002 4–7