Compaq Portable 386 Compaq Portable 386 Personal Computer Maintenance and Serv - Page 161
Corporation uses one fixed disk drive expansion unit with two 300 megabyte
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To use MS-DOS and the device driver with two fixed disk drives and one fixed disk drive expansion unit: o A maximum of two controllers can be plugged into the system bus. o Each controller can support only two fixed disk drives. Example: With the use of two fixed disk drive expansion units, a total of 1.2 gigabytes of fixed disk drive storage is available, divided into four 300 megabyte volumes. This configuration is shown in Figure 10-1. NOTE: For maximum storage, the system is connected in the same way as for duplexing or mirroring. The only difference between maximum storage and mirroring or duplexing is that the Novell NetWare software does not need to be used when the system is configured for maximum storage. Mirroring IMPORTANT: Novell NetWare software must be used when setting up the system for proper operation of the mirroring function. A possible mirroring configuration currently supported by Compaq Computer Corporation uses one fixed disk drive expansion unit with two 300 megabyte fixed disk drives. A single external fixed disk drive controller, plugged into the system bus and connected with a cable to an external interface adapter mounted in the fixed disk drive expansion unit complete this implementation (Figure 10-2). Data written to one fixed disk drive is exactly duplicated in the other.