Emulex MD21/S2, Техническое руководство

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General and Electrical Specifications
Table 3-1. General and Electrical Specifications (continued)
Parameter
Description
FUNCTIONAL
Subsystem
Configuration
One or two non-intelligent 5.25-inch
disk drives and one disk controller
per subsystem
Number of Heads Up to 16 read/write heads
Sector Size
Switch-selectable 256-byte sectors or
512-byte sectors
Data Buffering 32K bytes; approximately 14K bytes for
each LUN
Data Burst Rate 1.25 Megabytes/second
Self-Test Controller automatically executes
power-up self-test diagnostic routines
Error Detection/
Correction
48-bit ECC corrects up to 17-bit error
bursts. Bad sectors automatically
remapped to spare sectors; bad tracks
automatically remapped to spare
tracks .
INDICATORS
Fault/Activity
Di splay
Light-emitting diodes (LEDs) indicate
detected MD21 Controller fault
activity; MD21 Controller provides
signals that can be used to control
off-board LEDs
Option/Configuration
Switches
On-board switch module for burn-in
self-test procedures and MD21
Controller configuration
Operator Controls/
Indicators
Panel connector for remote control of
write-protect and display of
ready/busy and write protect status
(continued on next page)
3-2 Disk Controller Specifications