HP P2000 G3 MSA Array Systems - Manual (Page 52)

52 Troubleshooting
If the controller has failed or does not start, is the Cache Status LED on/blinking?
Transporting cache
To preserve the existing data stored in the CompactFlash, you must transport the CompactFlash from the
failed controller to a replacement controller using a procedure outlined in the HP P2000 G3 MSA System
controller replacement instructions, shipped with the replacement controller. Failure to use this procedure
will result in the loss of data stored in the cache module.
CAUTION: Remove the controller only after the copy process is complete, which is indicated by the
Cache Status LED being off.
Isolating a host-side connection fault
During normal operation, when a controller module host port is connected to a data host, the port’s host
link status LED and host link activity LED are green. If there is I/O activity, the host activity LED blinks green.
If data hosts are having trouble accessing the storage system, and you cannot locate a specific fault or
cannot access the event logs, use the following procedure. This procedure requires scheduled downtime.
IMPORTANT: Do not perform more than one step at a time. Changing more than one variable at a time
can complicate the troubleshooting process.
Host-side connection troubleshooting featuring SAS host interface ports
The procedure below apples to P2000 G3 MSA controller enclosures configured with 6Gb SAS host
interface ports.
1. Halt all I/O to the storage system.
2. Check the host activity LED.
If there is activity, halt all applications that access the storage system.
3. Reseat the cable and inspect for damage.
Is the host link status LED on?
• Yes – Monitor the status to ensure that there is no intermittent error present. If the fault occurs again,
clean the connections to ensure that a dirty connector is not interfering with the data path.
• No – Proceed to the next step.
4. Move the cable to a port with a known good link status.
Answer Actions
No, the Cache LED status is off, and the
controller does not boot.
If valid data is thought to be in Flash, see Transporting
cache ; otherwise, replace the controller.
No, the Cache Status LED is off, and the
controller boots.
The system is flushing data to disks. If the problem persists,
replace the controller.
Yes, at a strobe 1:10 rate - 1 Hz, and the
controller does not boot.
See Transporting cache .
Yes, at a strobe 1:10 rate - 1 Hz, and the
controller boots.
The system is flushing data to disks. If the problem persists,
replace the controller.
Yes, at a blink 1:1 rate - 1 Hz, and the
controller does not boot.
See Transporting cache .
Yes, at a blink 1:1 rate - 1 Hz, and the
controller boots.
The system is flushing data to disks. If the problem persists,
replace the controller.