Barracuda 7200.7 Product Manual, Rev. E 19
3.3 Jumper settings
3.3.1 Master/slave configuration
The options jumper block shown in Figure 1 is used to configure the dr ive for operation. It is the 8-pin dual
header between the interface connector and the power connector. Use the following settings to c onfigure the
drive as a master or a slave.
Master or single drive. The drive is configured at the factory for a master or single-drive operation with a
jumper set on pins 7 and 8.
Drive as slave. Remove all jumpers.
Drive as master with a non-ATA-compatible slave.
Use this jumper setting only if the drive does not work as a master with no jumpers installed.
Figure 1. Master/slave jumper settings
3.3.2 Cable-select option
Computers that use cable select determine the master and slave drives by selecting or deselec ting pin 28,
CSEL, on the interface bus. Master and slave drives are determined by their physical position on the cable. To
enable cable select, set a jumper on pins 5 and 6 as shown in Figure 1. Refe r to your computer manual to
determine whether your computer supports this option.
3.3.3 Alternate capacity jumper
Some older computers may “hang” at startup if their BIOS detects a disc drive with a c apacity g reater th an 32
Gbytes. This limits the drive’s capacity to 32 Gbytes when the alternate capacity jumper is used. To access the
full capacity of the drive, you can:
• Update the BIOS
• Use third-party software such as DiscWizard™ or Disk Manager
• Use a third-party host adapter
For drives with capacities greater than 32 Gbytes, the alternate capaci ty jumper changes the total ava ilable
LBA sectors to 32 Gbytes to solve issues with some BIOS d uring power on. The ATA Set Features subcom-
mand “F1H Report Full Capacity Available” causes Identify Data words 60 and 61 to report the full capacity.
See Section 4.1.3 on page 30 for more details on the Set Features co mmand.
Options jumper block
Circuit Boa
rd
2
684
1753
Drive is slave
Master or single drive
Cable select
Master with non ATA-
compatible slave
Limit drive capacity
to 32 Gbytes