What Happens Before A Disk Fails?
Motivation
Just Before a Disk Fails...
* Which Logs on What System?
Outline
The Tertiary Disk Architecture
Example of A Log Message
What kind of messages are generated?
m0: SCSI Time Outs+Recovered Errors
Can we predict a disk failure?
m11: SCSI Time Outs
m11: SCSI Time Outs + Hardware Failures
Are the other connected devices in the system affected in any way?
m2: SCSI Bus 2 Parity Errors
Can We Predict Other Kinds of Failures?
Can We Distinguish a Failing Disk From a Non-Failing Disk?
Total Disk & SCSI Errors Per Machine
Summary and Conclusion
Back Up Slides
m0: SCSI Time Outs
Email: randit@cs.berkeley.edu
Home Page: http://www.cs.berkeley.edu/~randit
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