Hitachi Serial ATA (SATA) hard disk drives do not have jumpers. Since SATA allows just one drive per port, SATA models do not require jumper addressing and will operate without them.

Standard Jumper Settings

16 Logical Head Jumper Settings (Normal Use)

"Device 0 (slave present)" means: the drive you are setting will be device 0 and, under this configuration, you will also have another drive, set as the "device 1 (slave)," as shown above.

Standard Jumper Configurations

Default factory settings: 16-head logical architecture, used in most systems, is enabled as the shipping default for drives sold through Hitachi Global Storage Technologies Buy Online partners. Master is set to “on” (i.e., jumpers on pins A-B and G-H). No other jumpers are fitted.

Master/Slave

Using master and slave jumper settings was formerly the most common way to configure an ATA drive, with one cable per port with two separate IDs on a port, 0 and 1, commonly called master ID0 and slave ID1. Now, cable select is more common and master and slave settings are used less frequently.

You can never have more than two devices per cable. In addition, some older PCs and most Macs are designed to support one ATA device per cable. Jumpers, not cable positioning, determine the ID, although the standard practice is to place the master (0) on the end of the cable, opposite from the end that plugs into the controller or motherboard. This is done because often there is only one drive attached to a cable, and an unused connector hanging on the end can cause interference.

While it is always a good idea to use the correct jumper setting, most systems will recognize a single boot drive, regardless of whether you jumper the drive to the master setting or use no jumpers at all.

Cable Select

Cable select is an alternative method to having separate jumper settings for master and slave. Cable select is the standard configuration for many systems and some system manufacturers provide drives with jumpers preset to use cable select. Your system documentation will indicate whether you need to jumper your hard disk drive to cable select.

To use cable select, jumper all devices to the cable select position (shown above), basing the ID on cable positioning (0 master at end, 1 slave in middle and dedicated controller connector). Cable select requires a cable that has a truncated line to allow the bus to locate each drive. Some of these cables have a visible hole in them or are color-coded.

With cable select, the jumper settings are the same on both drives (set to cable select) and the position on the cable determines whether a drive is master or slave."

Alternate Jumper Configurations

Setting the standard jumper settings as shown above will work for most scenarios that you will encounter. However, there are always some exceptions. If you have an older system that doesn't support the typical 16 logical head architecture, have an older BIOS, or need to disable auto spin, then the following settings may apply to you.

15 Logical Heads

Some systems may require a 15-head logical architecture because they translate greater than-4 GB drive by multiplying the head count by 16. The result (16 x 16 = 256) is interpreted as zero heads with a zero capacity and is an illegal head count.

Using the 15 logical head jumper setting produces a legal translation (16 x 15 = 240). The translated cylinder count varies to achieve the drive's full capacity.

15 Logical Head Jumper Settings

"Device 0 (slave present)" means that the drive you are setting will be device 0 and, under this configuration, you will also have another drive present in your system, set as the "Device 1 (slave)," as shown above.

Capacity Clip to 2 GB/32 GB

The figure below shows the jumper positions used to select Device 0 (master), Device 0 (slave present), Device 1 (slave), or cable selection, while setting the drive capacity down either to 2 GB or 32 GB for the purpose of compatibility. This option is used in situations where there is a BIOS limitation and the drive is not recognized at all.

The clip capacity 2 GB/32 GB option clips the capacity of the disk drive down to 2 GB for drives with a capacity of less than 34 GB and clips the capacity down to 33.8 GB for drives with a capacity of more than 34 GB. For example, a 10.1 GB drive with this option set will appear as a 2 GB drive and a 40 GB drive with this option set will appear as a 33.8 GB drive.

Settings - 20 GB Model

Settings for factory default capacities less than 32 GB.

The jumper setting acts as a 2 GB clip which clips the cylinder/head/sector (CHS) to 4096/16/63. The logical block address (LBA) is unchanged from the factory default setting (dependent on the particular model). Installing the 2 GB/32 GB capacity clip jumpers reduces the drive capacity to 2 GB.

Settings - All Other Models

Settings for factory default capacities greater than 32 GB.

The jumper setting acts as a 32 GB clip which clips the LBA to 66055248. The CHS is unchanged from the factory default of 16383/16/63. Installing the 2 GB/32 GB capacity clip jumpers reduces the drive capacity to 33.8 GB.

Disabling Auto Spin

This setting is rarely used and was most commonly used as a workaround for issues associated with older motherboards where hard drives did not spin up normally on boot.

These jumper settings are used for limiting power supply current when multiple drives are used. The “auto spin disable” setting disables the drive from automatically spinning up when power is applied.