Adaptec 1744 Installationsanleitung PDF herunterladen (Seite 24)

Section Two

NetWare 386 v3.1 Installation

2.2.2

Duplexing

Disk duplexing is when two host adapters are installed in a single file server, each with

its own disk mirrored together. These disk drives contain the same data. This ensures that

either one disk

one host adapter fails, the server will continue to operate.

386/486

•

Disks

contain

same

data

• Host adapters

different port

address/IRQ/DMA

• Driver must

loaded

twice

Mirroring and duplexing

are

both referred to as "mirroring" in the NetWare operating

system. During the "Installation" part

NetWare, the drive mirroring status will either

display "Not Mirrored"

"Mirrored". These drives may

on the

same

host adapter

(mirroring) or

separate host adapters (duplexing). Therefore, the procedure to mirror

duplex is exactly the same as far as NetWare is concerned. The only difference is the

hardware setup (one vs. two host adapters).

The following hardware considerations should be taken into account when preparing the

AHA-1540/1542/1640/1740/1744 disk drives for duplexing.

- The NetWare partitions should be nearly the saree size. NetWare will

not

allow partitions that vary greatly

size to be mirrored.

Consult

the

NetWare Installation manual for the limitations.

- Each drive should be connected to its own host adapter. Each host adapter

should have its own SCSI cable.

ASW-1440

2-12

adoptee

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