Wiki¶

Getting the Source Code¶

This project is open source. You can get the code on GitHub.

How failures are dedicated¶

Failures are identified based on the two things"

1. SMART health status
2. Known bad attributes

Monitoring SMART health status is easy. SMART will flag a disk as being a failure and indicate a failed test.

However, there are some other attributes that do not necessarily flagged by SMART as a failure but are known to be associated with failing disks. BackBlaze (see https://www.backblaze.com/blog/hard-drive-smart-stats/) has determined that the following can be used to flag drives as likely failing soon:

• SMART 5 – Reallocated_Sector_Count. (1-4 warning, > 4 replace)
• SMART 187 – Reported_Uncorrectable_Errors. (> 1 replace)
• SMART 188 – Command_Timeout. (1-13 warning, > 13 replace)
• SMART 197 – Current_Pending_Sector_Count. (> 1 replace)
• SMART 198 – Offline_Uncorrectable. (> 1 replace)

Contents¶

• Dependencies
• Installation
• Test Plan
• Troubleshooting