How to use terminal to retrieve lost drive

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asked by Vaughn Jarvi· 9d ago

Instant AI Answermedium confidenceGeneral Knowledge

9d ago· last updated 9d ago

AI starter answer — please verify with real-world experience. Awaiting trusted contributor review.

Using Terminal to retrieve a lost drive involves identifying the disk identifier, attempting to force-mount the volume, and running file system repair utilities like fsck or TestDisk to recover lost partitions.

What to do

1.Connect the drive and open Terminal (macOS/Linux).
2.Type 'diskutil list' (macOS) or 'lsblk' (Linux) to identify the drive's identifier (e.g., /dev/disk4 or /dev/sdb).
3.Attempt to force a mount by typing 'diskutil mountDisk /dev/diskX' (replacing X with your drive number).
4.Run a file system check using 'fsck_hfs -fy /dev/diskX' for Mac drives or 'chkdsk' on Windows PowerShell for NTFS drives.
5.If the partition table is missing, use a command-line tool like 'TestDisk' to scan for and recover lost partitions.

Common mistakes

×Using the 'format' or 'erase' command by mistake, which wipes all remaining data.
×Targeting the wrong disk identifier (e.g., wiping your internal OS drive instead of the external one).
×Continuing to stress a clicking or physically failing drive, which can lead to permanent head crashes.

Pro tip

Before running any repair commands, use the 'dd' or 'ddrescue' command to create a disk image of the drive. Working on a clone prevents further hardware degradation from permanent data loss.

Based on AI training data — may not reflect current information.

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