Sun Microsystems Ultra 5, Service Manual

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Chapter 7 Storage Devices 7-11
7.2.4 Hard Drive Mirroring
This section describes the requirements and constraints of a hard drive mirroring
solution that utilizes Solstice DiskSuite™ software.
7.2.4.1 Hard Drive Mirroring Configuration
The IDE subsystem of the Ultra 5 system has two independent channels designated
“primary” and “secondary”. On the Ultra 5 motherboard there are two separate
connectors for each channel, allowing each channel to support two devices. One
device may be jumpered as “master” (device 0) and the other as “slave” (device 1).
When mirroring hard drives in an Ultra 5 system, use this hardware configuration:
■
Primary channel—One hard drive jumpered as master
■
Secondary channel—One hard drive jumpered as master
Two IDE cables are required for this configuration. Each cable is connected to the
motherboard at one end and to a hard drive (jumpered as master) at the “MASTER”
connector.
FIGURE 7-7
shows this hardware configuration (with an optional CD-ROM
drive jumpered as a slave device on the secondary channel).
FIGURE 7-7
Hard Drive Mirroring Configuration
7.2.4.2 Hardware Considerations
This section describes special considerations and requirements for hardware when
mirroring hard drives in an Ultra 5 system.
Note – The two hard drives that are mirrored cannot be on the same channel. Both
hard drives must be jumpered as the master device on two separate channels.
Primary IDE channel
Motherboard J15
(primary channel)
Primary hard drive
(master-device 0)
Secondary IDE channel
Optional CD-ROM Motherboard J14
(secondary channel)
Primary hard drive
(master-device 0)
(slave-device 1)