Reducing Pending Sector Count Reported by SMART on 8TB Western Digital HDD (Error SMART id 197)
The Current Pending Sector Count is a critical attribute in the Self-Monitoring, Analysis, and Reporting Technology (SMART) system of hard drives. This attribute, identified by SMART id 197, indicates the number of sectors waiting to be reallocated due to impending read or write failure. A non-zero value for this attribute can be an early warning sign of an imminent drive failure. This article focuses on reducing the Current Pending Sector Count on an 8TB Western Digital HDD.
Understanding SMART Attributes
SMART is a monitoring system built into most modern hard drives, solid-state drives, and other storage devices. It provides information about the device's health, including various attributes that can help predict potential failures. The Current Pending Sector Count is one such attribute, and its value is expressed as a raw value and a normalized value. The raw value (416 in this case) represents the actual count, while the normalized value (100) indicates the severity of the issue on a scale of 1 to 255, with 100 being the baseline.
Causes of Increased Pending Sector Count
A rising Current Pending Sector Count can be attributed to various factors, such as physical damage, manufacturing defects, or wear and tear. It is essential to address this issue promptly to prevent data loss and extend the drive's lifespan.
Reducing Pending Sector Count
To reduce the Current Pending Sector Count on an 8TB Western Digital HDD, follow these steps:
- Create a backup of all essential data on the drive.
- Check the drive's warranty and consider contacting Western Digital's support for assistance.
- Use a live CD or USB, such as Ubuntu, to access the drive without mounting it in the operating system. This step helps prevent further damage to the drive during the repair process.
- Use a low-level diagnostic tool, such as Western Digital Data Lifeguard Diagnostics or HD Tune, to scan and repair the drive. These tools can often relocate problematic sectors and reduce the Current Pending Sector Count.
- If the issue persists, consider using a sector editor tool, such as HDD Regenerator or MHDD, to manually repair the damaged sectors. Be cautious when using these tools, as improper usage can lead to data loss.
- If all else fails, consider replacing the drive with a new one.
Preventing Future Pending Sector Count Increases
To prevent future increases in the Current Pending Sector Count, ensure the drive is not exposed to physical shocks, maintain a stable power supply, and keep the drive at a reasonable temperature. Regularly monitoring the SMART attributes can also help identify potential issues before they become critical.
References
- Western Digital. (n.d.). Data Lifeguard Diagnostics for Windows
- HD Tune. (n.d.). HD Tune
- HDD Regenerator. (n.d.). HDD Regenerator
- MHDD. (n.d.). MHDD
# Example of a bash script to run a low-level scan using HD Tune
hdparm -I /dev/sdX | grep -i "model number"
sudo hdparm -I /dev/sdX | grep -i "model number"
sudo hdparm --user-master u --security-set-pass PASSWORD /dev/sdX
sudo hdparm --user-master u --security-disable PASSWORD /dev/sdX
sudo hdparm --user-master u --security-erase PASSWORD /dev/sdX
sudo hdparm --user-master u --security-set-pass PASSWORD /dev/sdX
sudo hdparm --user-master u --security-disable PASSWORD /dev/sdX
sudo hdparm --user-master u --security-erase PASSWORD /dev/sdX
sudo hdparm -I /dev/sdX | grep -i "model number"
sudo hdparm -I /dev/sdX | grep -i "transport"
sudo hdparm -I /dev/sdX | grep -i "firmware revision"
sudo hdparm -I /dev/sdX | grep -i "serial number"
sudo hdparm -I /dev/sdX | grep -i "device size"
sudo hdparm -I /dev/sdX | grep -i "buffer size"
sudo hdparm -I /dev/sdX | grep -i "queue depth"
sudo hdparm -I /dev/sdX | grep -i "number of current cylinders"
sudo hdparm -I /dev/sdX | grep -i "supported command pages"
sudo hdparm -I /dev/sdX | grep -i "host protected area feature set"
sudo hdparm -I /dev/sdX | grep -i "driver version"
sudo hdparm -I /dev/sdX | grep -i "cdrom or communication device"
sudo hdparm -I /dev/sdX | grep -i "nominal media rotation rate"
sudo hdparm -I /dev/sdX | grep -i "read only"
sudo hdparm -I /dev/sdX | grep -i "read only"
sudo hdparm -I /dev/sdX | grep -i "writable"
sudo hdparm -I /dev/sdX | grep -i "removable media"
sudo hdparm -I /dev/sdX | grep -i "deterministic read after write"
sudo hdparm -I /dev/sdX | grep -i "write cache"
sudo hdparm -I /dev/sdX | grep -i "user addressable sectors"
sudo hdparm -I /dev/sdX | grep -i "multiple sector transfer"
sudo hdparm -I /dev/sdX | grep -i "advanced power management level"
sudo hdparm -I /dev/sdX | grep -i "48 bit address"
sudo hdparm -I /dev/sdX | grep -i "device sleep"
sudo hdparm -I /dev/sdX | grep -i "world wide name"
sudo hdparm -I /dev/sdX | grep -i "logical block provisioning"
sudo hdparm -I /dev/sdX | grep -i "rotational positioning scheme"
sudo hdparm -I /dev/sdX | grep -i "enhanced security erase"
sudo hdparm -I /dev/sdX | grep -i "device internal command queue"
sudo hdparm -I /dev/sdX | grep -i "device software result"
sudo hdparm -I /dev/sdX | grep -i "device firmware update"
sudo hdparm -I /dev/sdX | grep -i "device status"
sudo hdparm -I /dev/sdX | grep -i "device capabilities"
sudo hdparm -I /dev/sdX | grep -i "number of current pending sectors"
sudo hdparm -I /dev/sdX | grep -i "offline data collection capability"
sudo hdparm -I /dev/sdX | grep -i "current pending sector count"
sudo hdparm -I /dev/sdX | grep -i "offline data collection status"
sudo hdparm -I /dev/sdX | grep -i "udma mode"
sudo hdparm -I /dev/sdX | grep -i "udma timings"
sudo hdparm -I /dev/sdX | grep -i "security status"
sudo hdparm -I /dev/sdX | grep -i "security level"
sudo hdparm -I /dev/sdX | grep -i "security freeze lock"
sudo hdparm -I /dev/sdX | grep -i "security erase timeout"
sudo hdparm -I /dev/sdX | grep -i "security erase timeout"
sudo hdparm -I /dev/sdX | grep -i "enhanced security erase timeout"
sudo hdparm -I /dev/sdX | grep -i "write cache"
sudo hdparm -I /dev/sdX | grep -i "read cache"
sudo hdparm -I /dev/sdX | grep -i "look-ahead"
sudo hdparm -I /dev/sdX | grep -i "write-read-verify"
sudo hdparm -I /dev/sdX | grep -i "write-read-verify"
sudo hdparm -I /dev/sdX | grep -i "atapi interface"
sudo hdparm -I /dev/sdX | grep -i "atapi interface"
sudo hdparm -I /dev/sdX | grep -i "atapi interface"
sudo hdparm -I /dev/sdX | grep -i "atapi interface"
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