![Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248) Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)](https://www.manualowl.com/manual_guide/products/lenovo-thinkpad-t520-english-user-guide-fc76789/thumbnails/243.png)
Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)
![Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248) Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)](https://www.manualowl.com/manual_guide/products/lenovo-thinkpad-t520-english-user-guide-fc76789/thumbnails/2.png)
Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)
![Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248) Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)](https://www.manualowl.com/manual_guide/products/lenovo-thinkpad-t520-english-user-guide-fc76789/thumbnails/251.png)
Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)
![systemd mounts EFI variables as rw by default, meaning you could brick your device with a simple rm -rf : r/sysadmin systemd mounts EFI variables as rw by default, meaning you could brick your device with a simple rm -rf : r/sysadmin](https://external-preview.redd.it/JLSN5Zz-vqS6ISmlm1y2XlBJahiQSUvs3EjKWRhFmU8.jpg?format=pjpg&auto=webp&s=7c5f6143543e07b62c384342872c54e950501507)
systemd mounts EFI variables as rw by default, meaning you could brick your device with a simple rm -rf : r/sysadmin
![Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248) Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)](https://www.manualowl.com/manual_guide/products/lenovo-thinkpad-t520-english-user-guide-fc76789/thumbnails/1.png)
Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)
![Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248) Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)](https://www.manualowl.com/manual_guide/products/lenovo-thinkpad-t520-english-user-guide-fc76789/thumbnails/247.png)
Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)
![Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248) Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)](https://www.manualowl.com/manual_guide/products/lenovo-thinkpad-t520-english-user-guide-fc76789/thumbnails/5.png)
Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)
![Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248) Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)](https://www.manualowl.com/manual_guide/products/lenovo-thinkpad-t520-english-user-guide-fc76789/thumbnails/252.png)
Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)
![Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248) Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)](https://www.manualowl.com/manual_guide/products/lenovo-thinkpad-t520-english-user-guide-fc76789/thumbnails/253.png)
Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)
![Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248) Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)](https://www.manualowl.com/manual_guide/products/lenovo-thinkpad-t520-english-user-guide-fc76789/thumbnails/245.png)
Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)
edk2-UefiDriverWritersGuide/513_handle_database_and_protocol_services.md at master · tianocore-docs/edk2-UefiDriverWritersGuide · GitHub
![Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248) Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)](https://www.manualowl.com/manual_guide/products/lenovo-thinkpad-t520-english-user-guide-fc76789/247.png)
Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)
![Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248) Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)](https://www.manualowl.com/manual_guide/products/lenovo-thinkpad-t520-english-user-guide-fc76789/thumbnails/249.png)
Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)
![Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248) Detection error on HDD0 Main HDD, 0253: EFI Variable Block Data was destroyed. | Lenovo ThinkPad W520 | (English) User Guide (Page 248)](https://www.manualowl.com/manual_guide/products/lenovo-thinkpad-t520-english-user-guide-fc76789/thumbnails/4.png)