Deskstar T7K500
Jumper settings

Note: Serial-ATA models do not have jumpers. Serial-ATA does not require you to set jumpers and operates without them.

Models: (Parallel only) HDT725050VLAT80, HDT725040VLAT80, HDT725032VLAT80, HDT725025VLAT80

Jumper locations

Jumper settings

Note: Some systems may require you to use the 15 head logical architecture. This is because they translate a drive greater than 4 GB by multiplying the head count by 16. The result (16 x 16 = 256) is interpreted as 0 heads with a 0 capacity and is an illegal head count. Selecting the 15 head logical jumpers produces a legal translation (16 x 15 = 240). The translated cylinder count varies to achieve the drive's full capacity.

* "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.

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

Capacity clip to 2GB/32GB

The figure below shows the jumper positions used to select Device 0, Device 1, Cable Selection, or Device 1 (Slave) Present while setting the drive capacity down either to 2GB or 32GB for the purpose of compatibility. This option can be used in situations where there is a BIOS limitation and the drive is not recognized.

For the 20-GB model (factory default capacities less than 32GB):
The jumper setting acts as a 2GB clip which clips the CHS to 4096/16/63. The LBA is unchanged from the factory default setting (dependent on the particular model).  Installing the 2GB/32GB capacity clip jumpers reduces the drive capacity to 2GB.

For all other models (factory default capacities greater than 32GB):
The jumper setting acts as a 32GB clip which clips the LBA to 66055248. The CHS is unchanged from the factory default of 16383/16/63.  Installing the 2GB/32GB capacity clip jumpers reduces the drive capacity to 33.8GB.

Disabling auto spin

These jumper settings are used for limiting power supply current when multiple drives are used. The command to spin up is SET FEATURES (subcommand 07h).

Notes:

1. 16 head logical architecture is enabled as the shipping default. Master is set to on (i.e. jumper on pins A-B and G-H). No other jumpers are fitted.
2. Auto Spin Disable, disables the drive from automatically spinning up when power is applied.
3. The clip capacity 2GB/32GB option clips the capacity of the disk drive down to 2 GB for drives with a capacity of less than 34GB and clips the capacity down to 33.8GB for drives with a capacity of more than 34GB. For example, a 10.1GB drive with this option set will appear as a 2GB drive and a 40GB drive with this option set will appear as a 33.8GB drive.
4. When CABLE SELECT is specified, AT interface signal #28 CSEL  determines the drive address as follows:
   1. When CSEL is grounded or at a low level, the drive address is 0 (Device0).
   2. When CSEL is open or at a high level, the drive address is 1 (Device1).