User's Manual

25176a
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1
3
2
4
1. Loop B—Connects to an HBA 3. Loop A—Connects to an HBA
2. Loop B—Connects to an HBA 4. Loop A—Connects to an HBA
Figure 1 FC-AL loops (direct connect)
Components
Figure 2 shows the components of the DS2500 from front and rear views.
DS2500 front view
The front of the DS2500 holds the following components:
• Up to 14 FC disk drives mount in bays numbered 1 through 14 sequentially, from left to right. For
simplicity, a drive is referred to by its bay number.
• Enclosure status indicators located in the lower corner to the right of bay 14.
DS2500 rear view
The rear of the DS2500 holds the following components:
• An Env
ironmental Monitoring Unit (EMU) that provides protection against catastrophic failures. It
monit
ors, records and reports disk enclosure status conditions to the operating system software.
• Redundant power supply and blower assemblies that provide protection against power overloads,
short circuits, and overheating
• Redu
ndant I/O modules that provide an interface between the disks and the HBA
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Overview