We've investigated this behavior and found that the Root Cause Analysis (RCA) has been established as an issue with Rapid Storage Technology (RST) legacy OROMs, which can affect some versions of Dell PC OEM BIOS.
Dell is providing (since April 20, 2015) BIOS updates on their public download pages.
For the Dell E3x50 and 3x50 models, the BIOS version
A05 update resolves this issue for the following:
- Latitude E3550
- Latitude 3550
For the Dell E5x50 and 5x50 models, the BIOS version
A06 update resolves this issue for the following:
- Latitude E5250
- Latitude 5250
- Latitude E5450
- Latitude 5450
- Latitude E5550
- Latitude 5550
For the Dell E7x5 and 7x50 models, the Dell BIOS version A03 update (apart from DELL E7350), was released on April 15, 2015 to resolve this issue for the following:
- Latitude E7450
- Latitude 7250
- Latitude E7250
NOTE: If your XPS model incurs this issue, visit the Dell download page for the latest posted BIOS update.
