Drive health monitoring combines automated tests, attribute tracking, and alerts so you can act before failures impact uptime.
Schedule tests and checks
Use a simple schedule that fits your maintenance windows.
Weekly short S M A R T tests outside work hours
Monthly extended S M A R T tests with email alerts enabled
Quarterly review of logs and attributes
Key S.M.A.R.T attributes to watch
These attributes often change before a failure.
Attribute
Description
Action
Reallocated Sector Count (5)
Bad sectors remapped by the drive
Replace if the count grows
Reported Uncorrectable Errors (187)
Errors that could not be corrected
Investigate cabling and replace if persistent
Command Timeout (188)
Timeouts during operations
Check power and cables, monitor trend
Current Pending Sector (197)
Unstable sectors awaiting remap
Run extended test and consider replacement
Uncorrectable Sector Count (198)
Sectors that could not be corrected
Replace the drive
Temperature
Sustained high temperature reduces life
Improve airflow and keep within vendor guidance
Alerts and thresholds
Set alerts so you know when to act.
Enable email notifications for S M A R T failures and bad sector warnings
Set temperature alerts and adjust fan profiles if supported
Review test results after each extended test
Replacement guidelines
Replace proactively when risk increases.
Growing reallocated or pending sector counts
Repeat uncorrectable errors in logs
Abnormal noises, overheating, or frequent timeouts
Records and RMA
Good records speed up warranty claims and audits.
Keep logs, screenshots, and test results
Record serial numbers and install dates
Store purchase invoices and warranty terms
FAQs
Quick answers for common monitoring questions.
Are vendor tools required
DSM S M A R T tools are sufficient for most sites
Should I use SSDs for critical data
Use SSDs where low latency is required and monitor endurance
Do I need RAID if I have good monitoring
Yes, monitoring does not replace redundancy and backups
Need technical support or more detailed guidance? Please contact Synology via our Synology Support – Australia page. It includes ticket, Live Chat, warranty and downloads links.
Drive Health Monitoring on Synology: S.M.A.R.T, Tests, and Alerts