Purpose :
This guide is to provide a simple step-by-step guidance for users to follow on how to troubleshoot when an SSD's performance went wrong.
Requirement :
Environment with available smartctl utility.
Method :
This guide should also be helpful for user to troubleshoot. Take ”LITEON CV8-CE512” as an example.
1. Check whether Write Cache is off or not.
# hdparm -W /dev/sdX
2. If the response of step 1 is off, run the following command to enable Write Cache for SSD.
# hdparm -W1 /dev/sdX
3. If the response of step 2 is still off, please run the following command to check the status of SCT Control command flag.
# smartctl -g wcache-set /dev/sdX
4. Modify SCT Control command flag.
5. Run the command to enable Write Cache for SSD.
# hdparm -W1 /dev/sdX
6. User may proceed the SSD's performance tests.
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