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- UPS Monitor
-
- HyperDisk can monitor the status of any Uninterruptable Power Supply (UPS) that
- has a serial port. This is very useful for machines that are run unattended
- such as file servers and communiation workstations. By monitoring the UPS,
- HyperDisk can help prevent data loss by shutting down whenever the computer is
- not running on normal power. This helps prevent any data that would be in a
- "staged write" buffer from being lost by turning off staged writes whenever
- normal power is not being used.
-
- The UPS Monitoring function is very flexible and can monitor any I/O port
- for active signals. Multiple signals can be monitored as well as signals with
- different polarity.
-
- The UPS Monitoring function can work in conjuntion with other monitors such
- as the monitors built into Lantastic and Novell.
-
-
- Use the UP: parameter to set up the UPS Monitoring function.
-
- UP:{IoPort}:{IoPolarity}:{IoMask}:{CacheMask}[:{PollSeconds}[:{PollCount}]]
-
- Items in {} are required, item in [] optional.
-
-
- IoPort Input port address. This is the address of the port to be monitored.
- This number must be in Hexidecimal format.
-
-
- IoPolarity Inverts sense of input port bits. Normally the monitor looks for a
- "high" signal for a true occurance of a state. By switching the
- polarity, the monitor will look for a low occurance of the state.
- 0 does not change value
- 1 inverts bits sense
-
- IoMask Determines which bits to test for non-zero conditions.
- 0 drops bit from test
- 1 retains IoPort bit value.
- Non-Zero results indicates active UPS (AC power off)
- Zero results indicates inactive UPS (AC power on)
-
- CacheMask is a bit field
- 1 disables function if this bit occurs
- 0 no change to function if this bit occurs
-
- Bit BitName A one (1) will disable the corresponding function
-
- 0 StagedFloppy Stage Write floppy drive write operations
- 1 StagedHard Stage Write hard drive write operations
- 2 VerifyFloppy Verify floppy drive write operations
- 3 VerifyHard Verify hard drive write operations
- 4 Reserved0 Reserved always 0
- 5 Reserved1 Reserved always 0
- 6 FloppyEnable Enable floppy caching
- 7 CacheEnabled Enable all caching functions
-
-
- PollSeconds Sets the period in seconds to sample IoPort value. Every nn
- seconds the I/O port will be checked for changes in status.
-
- PollCount Sets the number of identical IoPort samples before changeing
- the cache state. This tells the monitor how many times it should
- wait after seeing a change in the state of the UPS before it should
- change the status of the cache. This helps keep the cache from
- changing states if the UPS just goes onto battery power for a
- moment such as during a brown out.
-
-
-
- IoMask Values for COM port based UPS monitoring system
-
- To set the IOMask values you must determine which pin on the I/O port you
- are going to use to monitor the UPS. Most of the UPS' use the Carrier
- Detect Pin on a PC serial port to monitor the UPS status.
-
- To calculate the IOPort address to use you must first determine which
- port you are going to be monitoring, then, calculate the offset to the
- port register that you will be using. In most cases you will be using a
- serial port at either COM1 or COM2 and monitoring the Modem Status Register.
- To monitor the Modem Status Register on COM1 you would calculate the following
- address:
-
- COM1 is generally located at 3F8.
- COM2 is generally located at 2F8.
- Modem Status Register is 6 Bytes from the port address.
- The IOPort address would be 3F8 (COM1) + 6 (MSR) = 3FE for COM1
- The IOPort address would be 2F8 (COM2) + 6 (MSR) = 2FE for COM2
-
-
- Below is a list of the common pins used to monitor UPS functions.
-
- 9-Pin Port 25-Pin Port Signal Name IoMask IoPolarity
-
- Pin 1 Pin-8 Carrier Detect 80 00
-
- Pin 6 Pin-6 Data Set Ready 20 00
-
- Pin 8 Pin-5 Clear To Send 10 00
-
- Pin 9 Pin-22 Ring Indicator 40 00
-
-
- To make your own cable for the American Power Conversion (APC) UPS follow the
- pin-out details below:
-
-
- APC 9 pin interface Computer 9 pin interface
-
- Cable end: Male (Pins) Cable end: Female (Sockets)
-
-
- Pin 2 - AC Power Fault------------------Pin 1 - Modem Data Carrier Detect
-
- Pin 4 - Signal Ground-------------------Pin 5 - Signal Ground
-
-
- Example:
-
- Monitor COM2, Modem Status port: Bit 7, Carrier Detect, normal polarity
- If power fails disable Staged Writes on both hard and floppy drives
- 30 second sample period, 3 matching samples indicates active/inactive UPS
-
- HYPERDK UP:2FE:0:80:3:30:3