Error threshold exceeded and drive channel degraded

[arsajal]

in below give the brief description of my storage DS4800 error. if any one can help me then pls help. and give me suggestion to resolve this error.



DETAILS

DRIVE CHANNEL 1

Status: Degraded
Reason: Error threshold exceeded
Max. Rate: 4 Gbps
Current Rate: 4 Gbps
Rate Control: Auto
Controller A link status: Up
Controller B link status: Up

DRIVE COUNTS

Total # of attached drives: 16
Connected to: Controller A, Port 4
Attached drives: 16
Drive enclosure: 0 (16 drives)


CUMULATIVE ERROR COUNTS

Controller A
Baseline time set: 7/21/07 2:51:03 PM
Sample period (days, hh:mm:ss): 306 days, 01:29:50
Controller detected errors: 2
Drive detected errors: 0
Timeout errors: 0
Link down errors: 1
Total I/O count: 2082471618

Controller B
Baseline time set: 7/21/07 2:51:04 PM
Sample period (days, hh:mm:ss): 306 days, 01:29:49
Controller detected errors: 1063
Drive detected errors: 0
Timeout errors: 0
Link down errors: 0
Total I/O count: 426955475

CAPTURED INTERVAL ERROR COUNTS

Controller B
Start time: {0} 7/21/07 2:51:04 PM
End time: {0} 5/22/08 4:20:46 PM
Controller detected errors: 1063
Drive detected errors: 0
Timeout errors: 0
Link down errors: 0
Total I/O count: 426954632

 

[groener]

If it's not pointing to a drive failure, I would say by looking at the data that Controller B has exceeded a error threshold and has failed over to controller A. With drives they call this same thing "Predictive Drive failure". If a drive has too many "minor errors" it places it offline like it has experienced a major failure. (and fails it over to a hot spare)

I've never seen that with a controller before, though.

I would probably call hardware support ASAP (especially if the DS4800 is a production system). They will walk you through collecting support data, plus they have tools that can give you a more accurate description of what has failed. It might just be a bad SFP.