Mirrored Memory Module - ESI -1000 Installation Manual

ESI Communications Servers Hardware Installation Manual

Mirrored Memory Module

Note: For full instructions on installing the M3, see its Installation Guide (ESI #0450-0912).
The Mirrored Memory Module (M3) ensures reliability and survivability of compatible ESI Communications Servers.
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Using RAID -1 hard-disk drive technology, mirrored hard drives are intended to maintain system operation on
one disk drive in the event a hard drive fails. No system programming is required for the M3 to function.
Note: The ESI-1000 has all M3 components built-in, so the installation on the ESI-1000 of the hard-drive Memory
Modules (see "Procedure for two hard-drive Memory Modules (ESI-1000)," page F.5) enables M3 operation
on that system. M3 components are optional for the ESI-600 and ESI-200, and must be installed onto the
ESI Communications Server main board.
The M3 is a printed circuit assembly that supports two identically configured hard drives, mounted on standoffs.
It also has LED indicators, an audible alarm, alarm reset button, and an IDE cable connector for connection to
the main board.
For the mirroring operation to function properly on the ESI Communications Server, each hard drive must be
formatted and prepared by ESI.
Installing the M3 (ESI-600 • ESI-200)
The M3 kit consists of an M3 printed circuit board, hard drive mounting plate, faceplate, four (4) 1 -inch
standoffs, 12 nylon spacers (washers), eight (8) screws, and an IDE cable for connection to the main board.
Refer to Fig. M3-1, below, to identify and locate where these components will be installed.
Memory Modules (hard drives, or HDDs) are obtained separately. Note that each hard drive must be an
ESI-formatted drive for the mirroring operation to function properly.
The M3 board itself includes LED indicators, cable connectors, an audible alarm, and alarm reset button.
Important: If the M3 is being installed on a system that already has an existing Memory Module (hard disk drive),
the existing Memory Module must be installed in the M3 as the primary HDD (see Fig. M3-3). If it is
not, then the drive synchronization will not operate correctly, and the system will have to be initialized
and reprogrammed.
Fig. M3-2: M3 faceplate
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Stands for redundant array of independent drives.
Fig. M3-1: Mounting locations of M3 hardware
Fig. M3-3: Hard-disk drive positions on M3
F.9
ESI-1000, ESI-600, ESI-200