4

Serial and Parallel ATA Drive Guidelines and

Features

✎

Serial ATA = SATA

Parallel ATA = PATA

HP only supports the use of SATA drives on these models of computer. No PATA drives are supported on these models.

Serial ATA Hard Drive Characteristics

Number of pins/conductors in data cable

Number of pins in power cable

Maximum data cable length

Data interface voltage differential

Drive voltages

Jumpers for configuring drive

Data transfer rate

7/7

15

39.37 in (100 cm)

400-700 mV

3.3 V, 5V, 12 V

N/A

3.0 Gb/s

SATA connectors on the system board are color coded to make identification easier.

SATA Identification

Primary channel, device 0

Primary channel, device 1

Secondary channel, device 0

Secondary channel, device 1

Color

Dark blue

Light Blue

White

Orange

Port

SATA 0

SATA 2

SATA 1

SATA 3

Attachment

Sequence

1

4

2

3

✎

If there is an error on the application of the attach rules, a POST error message may be displayed.

4–1 Service Reference Guide, dc5750 437963-001

Serial and Parallel ATA Drive Guidelines and Features

4.2 SATA Hard Drive Cables

4.2.1 SATA Data Cable

Always use an HP approved SATA 3.0 Gb/s cable as it is fully backwards compatible with the

SATA 1.5 Gb/s drives.

Current HP desktop products ship with SATA 3.0 Gb/s hard drives.

SATA data cables are susceptible to damage if overflexed. Never crease a SATA data cable and never bend it tighter than a 30 mm (1.18 in) radius.

The SATA data cable is a thin, 7-pin cable designed to transmit data for only a single drive. As shown in the table, each cable has 3 grounds, and 4 transmit/receive pins.

Pin Number

P1

P2*

P3*

Usage

Ground

A+

A-

Ground P4

P5**

B-

P6**

P7

B+

Ground

*P2 and P3 differential signal pair

**P5 and P6 differential signal pair

4.2.2 SATA Power Cable

Device Plug

Ground

Transmit data

Transmit data

Ground

Receive data

Receive data

Ground

Host Plug

Ground

Receive data

Receive data

Ground

Transmit data

Transmit data

Ground

P4

P5

P6

P7

P8

Pin

P1

P2

P3

Usage

V3.3

V3.3

V3.3

Ground

Ground

Ground

V5

V5

Notes

3.3 V power

3.3 V power

3.3 V power

5 V power

5 V power

Pin

P9

P10

P11

P12

P13

P14

P15

Usage

V5

Ground

Ground

Ground

V 12

V12

V12

Notes

5 V power

12 V power

12 V power

12 V power

4–2 437963-001 Service Reference Guide, dc5750

Serial and Parallel ATA Drive Guidelines and Features

4.3 PATA Device Information

No PATA drives are supported on these models.

4.4 ATA SMART Drives

The Self Monitoring Analysis and Recording Technology (SMART) ATA drives for the HP

Personal Computers have built-in drive failure prediction that warns the user or network administrator of an impending failure or crash of the hard drive. The SMART drive tracks fault prediction and failure indication parameters such as reallocated sector count, spin retry count, and calibration retry count. If the drive determines that a failure is imminent, it generates a fault alert.

4.5 Hard 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.

Because of the differences in the way that drive sizes are calculated, the size reported by the operating system may differ from that marked on the hard drive or listed in the computer specification. 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

File

System

FAT 32

NTFS

Controller

Type

ATA

ATA

Operating System

Windows 2000/ XP

Windows NT/2000/XP

Maximum Size

Partition Drive

32 GB

2 TB

2 TB

2 TB

Service Reference Guide, dc5750 437963-001 4–3

Serial and Parallel ATA Drive Guidelines and Features

4–4 437963-001 Service Reference Guide, dc5750