In the Pre-Boot environment, the system often loads a generic US English keyboard driver by default. If your password relies on a specific regional layout (like German QWERTZ or French AZERTY) to produce the € , the pre-boot environment might be "blind" to that combination. It sees the key press but translates it incorrectly, causing your password to fail every time you try to unlock the drive.
Lenovo often intentionally restrict character sets to prevent users from accidentally bricking their drives. If you set a complex symbol on a laptop in Europe and then try to unlock it on a replacement motherboard or in a different region with a different keyboard layout, you may find it impossible to replicate the exact "Euro" input. To ensure you can always access your data, most manufacturers stick to the "lowest common denominator": why can't i use the euro (€) symbol in my ssd password?
In the early stages of booting, most systems rely on basic character encoding standards, typically (American Standard Code for Information Interchange). In the Pre-Boot environment, the system often loads
Even if the system allows you to set the password using € , you are taking a massive risk. The system might record the password using one character encoding method, but attempt to unlock it using a different one during boot. Even if the system allows you to set
But the ATA Security spec (T13) expects a password of 1–32 bytes. Sending 3 bytes for one symbol either:
If the motherboard BIOS updates or resets its default keyboard language, your € might be interpreted as a question mark ? or a capital E , rendering your drive permanently locked.