Don’t store critical archives on only one drive. Use RAID 1 (mirroring) or regularly back up to external drives. A secondary copy protects against bad sectors.
dd if=damaged.gz bs=10 skip=1 2>/dev/null | gzip -dc decompression failed with error code-11
Here is the "story" or breakdown of why this happens and how to fix it: The Cause: Why Decompression Fails Don’t store critical archives on only one drive