User Manual

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Set the Jumpers
It is not necessary to add a jumper shunt on the drive for
workstation/desktop use. For enterprise storage enviroments, use
the following advanced settings:
SSC Mode: spread spectrum clocking feature enabled or
disabled. Default setting is disabled or no jumper shunt placed on
pins 1–2. Adding the jumper to pins 1–2 enables the spread
spectrum clocking feature.
PM2 Enabled Mode: to enable power-up in standby (power
management 2 or PM2) mode, place a jumper on pins 3–4. This
mode enables controlled spinup by spinup command in
accordance with ATA standard and is mainly for server/workstation
environments operating in multiple-drive configurations.
Note: The PM2 feature is not available on all WD SATA drives.
OPT1: 150 MB/s data transfer speed enabled or disabled. Default
setting is disabled. To enable 150 MB/s data transfer speed, place
a jumper on pins 5–6.
OPT2: reserved for factory use (pins 7–8).
Important: DO NOT change the default setting if you intend to
use the drive in a desktop computer. Change the jumper settings
ONLY if you intend to use the drive in an enterprise storage
environment. For more information on these advanced settings,
visit support.wdc.com.
Important: PM2 mode requires a compatible BIOS that
supports this feature. If PM2 is enabled and not supported by
BIOS, the drive does not spin up and therefore is not detected by
the system.
Figure 1
Default
Standard configuration (no jumper added).
Spread spectrum clocking disabled.
SSC Enabled
Spread spectrum clocking enabled
(jumper on pins 1-2).
PM2 Enabled
PM2 enabled (jumper on pins 3-4). Controlled
spinup via spinup command (ATA standard).
OPT1 Enabled
1.5 Gb/s data transfer speed enabled
(jumper on pins 5-6).
Figure 2
Mounting frame
Note: Jumper shunt not included.
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