A comprehensive bash script for checking the health of various storage devices including SATA HDD/SSD, SAS HDD/SSD, NVMe drives, and RAID configurations. This script provides detailed SMART data analysis, lifespan estimation, and health status reporting.

Features

Multi-Device Support: Works with SATA HDD/SSD, SAS HDD/SSD, NVMe drives
RAID Controller Detection: Supports MegaRAID, 3ware, Areca, HP Smart Array, Adaptec, and software RAID (MDRAID)
Comprehensive Health Analysis:
- SMART attribute reading and interpretation
- Power-on hours tracking
- Temperature monitoring
- Reallocated and pending sector counts
Lifespan Estimation:
- HDD lifespan based on usage and error metrics
- SSD/NVMe TBW (Total Bytes Written) calculation and endurance estimation
- Wear level analysis
Enterprise vs Consumer Classification: Automatically detects drive class and applies appropriate endurance standards
Auto-Detection: Automatically discovers all connected storage devices
Color-Coded Output: Easy-to-read color-coded health status

Requirements

smartmontools package must be installed
Root privileges (for accessing all disk information)
Bash shell

Installation

Ensure smartmontools is installed:

# Ubuntu/Debian
sudo apt-get install smartmontools

# CentOS/RHEL
sudo yum install smartmontools

# Harvester OS
# smartmontools should be available in the package manager

Download the script:

wget https://raw.githubusercontent.com/yourusername/harvester-disk-health/main/harvester-v3.8.sh
chmod +x harvester-v3.8.sh

Usage

Basic Usage (Auto-detect all disks)

sudo ./harvester-v3.8.sh

Check Specific Disks

sudo ./harvester-v3.8.sh /dev/sda
sudo ./harvester-v3.8.sh /dev/nvme0n1
sudo ./harvester-v3.8.sh /dev/sda /dev/sdb /dev/nvme0n1

Help and Version Information

./harvester-v3.8.sh --help
./harvester-v3.8.sh --version

Output Interpretation

Health Status Colors

🟢 GREEN: Healthy - No immediate concerns
🟡 YELLOW: Warning - Monitor closely, some wear detected
🔴 RED: Critical - Immediate attention required

Key Metrics Explained

For HDDs:

Power On Hours: Total operational time
Reallocated Sectors: Bad sectors that have been remapped
Pending Sectors: Sectors waiting to be remapped
Start/Stop Count: Mechanical cycle count
Load Cycle Count: Head load/unload cycles

For SSDs/NVMe:

TBW Used: Total terabytes written to date
TBW Endurance: Manufacturer's estimated endurance
TBW Remaining: Estimated remaining write capacity
Media Wearout: SSD wear level indicator
Lifetime Used: Percentage of lifespan consumed

Supported Controllers & Protocols

Direct SATA/SAS: Standard AHCI drives
NVMe: Native NVMe protocol
Hardware RAID:
- MegaRAID (LSI/Broadcom)
- 3ware
- Areca
- HP Smart Array
- Adaptec
Software RAID: Linux MDRAID

Drive Classification

The script automatically classifies drives as Enterprise or Consumer based on:

Model name patterns (PRO, EP, DC, ENT, ENTERPRISE)
Interface type (SAS drives are always enterprise)
SMART feature detection

TBW Endurance Standards

Consumer SSDs

Capacity	Minimum TBW
250GB	150 TB
500GB	300 TB
1TB	600 TB
2TB	1200 TB
4TB	2400 TB
8TB	4800 TB

Enterprise SSDs

Capacity	Minimum TBW
250GB	450 TB
500GB	900 TB
1TB	1800 TB
2TB	3600 TB
4TB	7200 TB
8TB	14400 TB

Note: Actual TBW endurance may vary depending on the specific drive model and manufacturer. SAS SSDs often do not expose write statistics through SMART, so TBW information may not be available for these drives.

Known Model Database

The script includes a database of known drive models with their capacities for accurate reporting. Currently supported models include:

Seagate: ST91000640NS, ST2000NM0033, ST4000NM0033, etc.
Hitachi: HUC101212CSS600, HUC103012CSS600, etc.
Samsung: MZILT series
And many more...

Troubleshooting

"Cannot read disk information" Error

Ensure the disk is not offline or in standby
Try running with root privileges
For RAID controllers, specify the correct controller type

"smartctl is not installed" Error

sudo apt-get install smartmontools  # Ubuntu/Debian
sudo yum install smartmontools      # CentOS/RHEL

SAS Drive Detection Issues

SAS drives may require specific controller parameters. The script attempts auto-detection, but manual controller specification may be needed for some configurations.

Version History

v3.8: Enhanced SAS SSD support, improved TBW calculations, added enterprise classification
v3.7: Added NVMe support, improved RAID detection
v3.6: Initial release with basic SATA/SAS support

Contributing

Contributions are welcome! Please feel free to submit pull requests or open issues for:

New drive model additions
Additional RAID controller support
Bug fixes and improvements

License

This script is provided as-is under the MIT License.

Author

Adam T. Lau - Creator and maintainer

Disclaimer

This script is provided for informational purposes only. Always maintain proper backups and consult drive manufacturer documentation for specific health monitoring recommendations. The lifespan estimates are approximations based on standard industry metrics and actual drive performance may vary.