HP 3000 Enterprise Virtual Array - Manual (Page 66)

Reporting group numbers
The reporting group number (RGN) range is 0000 through 4099, decimal.
• 0000 is reserved for enclosures that are not part of any reporting group.
• 0001 through 0015 are RGNs reserved for use by the EMU.
• 0016 through 4095 are valid RGNs.
• 4096 through 4099 are invalid RGNs.
The reporting group numbers are displayed on the EMU alphanumeric display as a pair of two-digit
displays. These two displays are identified as rH and rL.
• Valid rH displays are in the range 00 through 40, and represent the high-order (most significant)
two digits of the RGN.
• Valid rL displays are in the range 00 through 99, and represent the low-order (least significant)
two digits of the RGN.
To view a reporting group number:
1. Press and release the bottom push button until the alphanumeric display is rG.
2. To display the two most significant digits of the Reporting Group Number, press and hold the
top push button unit the display is rH.
3. Press and release the top push button to display the first two digits of the RGN.
4. Press and release the top push button until the alphanumeric display is rH.
5. Press and hold the top push button until the alphanumeric display is rL.
6. Press and release the top push button to display the last two digits of the Reporting Group Number.
7. To exit the display, press and release the bottom push button until the alphanumeric display is rG.
Fibre Channel loop switches
The Fibre Channel loop switch acts as a central point of interconnection and establishes a fault-tolerant
physical loop topology between the controllers and the disk enclosures.
66 Enterprise Virtual Array hardware components