Troubleshooting; Advanced Jumper Settings - Western Digital WD SATA Hard Drives Installation Manual

Troubleshooting

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This section contains information on the following topics:

Advanced Jumper Settings

Frequently Asked Questions
Western Digital Service and Support Information
Advanced Jumper Settings
Western Digital Serial ATA hard drives ship with a jumper shunt in the Default position
(across pins 1 and 2). It is not necessary to move the jumper shunt on the drive for
workstation/desktop use. For enterprise storage environments, use the following advanced
settings:
SSC_DIS Mode (Default) – Spread spectrum clocking feature enabled or disabled. Default
setting is disabled or jumper shunt is placed on pins 1 and 2. Removing the jumper shunt will
enable spread spectrum clocking feature.
PM2 Mode – To designate the drive as power-up in standby (power management 2 or PM2)
enabled, install the jumper shunt on pins 3 and 4. The mode enables controlled spinup,
mainly used for server/workstation environments operating in multiple drive configurations.
IMPORTANT: PM2 mode requires a compatible BIOS that supports this feature. If PM2
is enabled and not supported by BIOS, the drive will not spin up and therefore will not be
detected by the system.
OPT1 - Factory use only.
OPT2 - Factory use only.
Jumper Settings for Western Digital Serial ATA Hard Drives
WESTERN DIGITAL SERIAL ATA HARD DRIVE
INSTALLATION GUIDE
TROUBLESHOOTING - 18