Jumper Setting Information

All Caviar drives have a jumper block (J8) located between the 40-pin IDE connector and the power connector. These jumpers select the physical detection options on the hard drive. All Caviar drives are factory set for Cable Select installation.

Single-Drive Installation

If you are installing the drive as the only IDE drive on the cable and the system plus the ribbon cable do not support Cable Select, place the jumper shunt in the neutral storage position.

Dual-Drive Installation

In dual drive installations (2 devices on the IDE cable), jumper shunts are needed to designate which device is master (first device detected) and which is slave (second device detected). Refer to Figure 1 or Figure 2 for an illustration of all jumper settings.

If you have a dual installation, you must designate one of the drives as the master and the other as the slave. The jumper pins on block J8 need to be configured for dual installation. If the other IDE device on the cable is not a Western Digital IDE drive, consult its installation guide for master/slave configuration.

To install a jumper shunt on the J8 jumper pins:

• Refer to Figures 1 or 2 to determine your configuration.
• Carefully place the shunt over the pins specified in the figure.
• Push the shunt into place until it is flush against the base of the jumper block.

Note: Designation of a drive as either master or slave is generally determined by jumper configuration, not by the order in which it is daisy-chained to the other drive. The only exception is if the drive is jumpered "cable select", and both the system and ribbon cable support cable select.In this case, master and slave is determined by the position on the data ribbon cable. Depending how the system controls the cable select line on the ribbon cable determines where the master and slave need to be attached. Refer to your system manual for more information.

Figure 1. (6 & 10 pin drives)

Figure 2. (9 pin drives)
The pins on the drive may be designated by either letters or numbers.

EIDE Drives Greater than 2.1 GB

This section pertains to the Western Digital drives such as
AC32500 - The cylinder count of this drive is greater than 4095.
AC313000 - The cylinder count of this drive is greater than 16383.
The 16383 cylinder limit affects any drive larger than 8.4GB. There is an additional BIOS limit of 32 GB. You may notice that a drive much larger than 8.4 GB, such as WD400BB, has the same cylinder count. This is because newer systems use INT13 extensions and no longer use the cylinder count to recognize the drive’s full capacity. However the symptoms and the solutions are identical.

Some system BIOS's CANNOT properly recognize hard drives that have more than 4095 cylinders, while others CANNOT properly recognize hard drives that have more than 16383 cylinders at the 8.4 and 32 GB capacity limits. You will know if your system BIOS has this limitation after installing your drive. On the initial boot your system may a) lock up, or b) show a much smaller drive capacity.

a) If your system locks up (i.e. does not respond after a few minutes), follow these steps:

1. Turn your system power off.Check the IDE interface and power supply cables to make sure that they are properly connected.
2. Check jumper settings.
3. Turn your system power on.
4. Try to enter your CMOS setup.

1. Use Data Lifguard Tools EZ-Install. If your system locks up before you can enter CMOS, you may need to turn your system power off and disconnect the IDE cable from the system to access your CMOS setup.
   • Enter your CMOS setup. Refer to your system manual for instructions.
   • Select the Hard Disk Type option for the new Western Digital hard drive. Select a User Defined drive type and enter: 1023 x 16 x 63.
   • Turn your system off and reconnect your IDE cable to the system. These new settings will allow your system to boot so that you can install Data Lifguard Tools EZ-Install to access the full capacity of your drive.

   - OR -

   If you don't have the User Defined drive type, use option 2 or 3 below.

2. If you have a 6 or 10-pin drive, re-jumper the drive using the alternate jumper settings as shown in figure 3 and install Data Lifguard Tools EZ-Install. This option changes the parameters reported to the BIOS. If later on you move this drive to another system, you must put the jumper back to the standard position.

   Note: These alternate jumper settings WILL NOT work for Windows NT, OS/2 Warp, Novell NetWare, or UNIX.

   If you have a 9-pin drive, alternate jumper settings can be used, however, this can cause problems. Therefore, we do not recommend using the alternate jumpers on 9-pin drives.

   - OR -

3. Upgrade your BIOS. A properly upgraded BIOS will support the drive. Contact your system manufacturer. See the list of common system and BIOS manufacturers and their phone numbers.

   Figure 3. Alternate Jumper Settings (6 & 10 pin drives)

   

• SCSI ID Jumpers
  NOTE: the jumper label on the top of your SCSI drive refers to the ID pins as SCSI ID0, SCSI ID1, SCSI ID2, and SCSI ID3. This refers to the SCSI ID BIT. Please follow this table for configuring the device ID.
  

  SCSI ID	Pins 7 & 8	Pins 5 & 6	Pins 3 & 4	Pins 1 & 2
  0
  1				X
  2			X
  3			X	X
  4		X
  5		X		X
  6		X	X
  7		X	X	X
  8	X
  9	X			X
  10	X		X
  11	X		X	X
  12	X	X
  13	X	X		X
  14	X	X	X
  15	X	X	X	X
  - applies to 8-bit drives                                X - jumper installed

• Option Pins

  WDE2170/4360

  Pins*	Feature
  X & 10	(Key) / LED-
  11 & 12	Reserved or Spindle Sync **
  13 & 14	Disable Auto-Start
  15 & 16	Auto-Start Delay
  17 & 18	SCAM
  19 & 20	Disable Unit Attention
  21 & 22	Disable Target Initiated Synchronous/Wide Negotiation
  23 & 24	SCSI Termination
  25 & 26	Reserved (TXD/RXD)
  27 & 28	Termination Power
  29 & 30	LED+ / Reserved
  31 & 32	Reserved
  33 & 34	Reserved

  WDE9100

  Pins*	Feature
  X & 10	(Key) / LED-
  11 & 12	11 - Ground / 12 - LED+
  13 & 14	Disable Auto-Start
  15 & 16	Auto-Start Delay
  17 & 18	SCAM
  19 & 20	Disable Unit Attention
  21 & 22	Disable Target Initiated Synchronous/Wide Negotiation
  23 & 24	SCSI Termination
  25 & 26	Reserved (TXD/RXD)
  27 & 28	Termination Power
  29 & 30	LED+ / Reserved
  31 & 32	Reserved
  33 & 34	Reserved

  * Jumpering the pins enables the feature.
  ** Spindle Sychronization was removed from later WDE2170/4360 models

• LED Support

If your system configuration allows the use of an activity LED external to the WD Enterprise drive, you can power the LED from the drive. Pins 10 and 29 (and 12 on the WDE9100) are dedicated to LED support. To install an external activity LED, connect the positive lead (anode) of the LED to pin 29 (or pin 12 on the WDE9100) and the negative lead (cathode) to pin 10.

• Reserved Pins

The remaining pins are reserved for development and manufacturing purposes.

• Remote Option Block

  68-pin models have a remote option block that is located between the data and power connectors of the drive. This jumper block is intended for use in systems where the drive is installed into a customized "sled" that plugs into the SCSI bus. The block is used to configure ID and termination and supplies power. Unless the drive is installed in this type of system, the remote option block should not be used.

You can find additional detailed information about the jumper pins on Enterprise SCSI drives in the installation guides and technical reference manuals available from our Technical library.

Drive Rails

Some computer systems have 5.25-inch drive bays that require unique sliding drive rails to complete the hard drive installation. Each system manufacturer has a different type of drive rail and for this reason, rails are not included with Western Digital hard drives. If your system requires drive rails, you must contact the computer system manufacturer directly to obtain the rails for your particular system. The following is a list of the most common system manufacturers and their corresponding phone numbers: