➜ nbilal sudo f3probe /dev/sdb [sudo] password for nbilal: F3 probe 7.1 Copyright (C) 2010 Digirati Internet LTDA. This is free software; see the source for copying conditions. WARNING: Probing normally takes from a few seconds to 15 minutes, but it can take longer. Please be patient. Probe finished, recovering blocks... Done Bad news: The device `/dev/sdb' is a counterfeit of type limbo You can "fix" this device using the following command: f3fix --last-sec=55433159 /dev/sdb Device geometry: *Usable* size: 26.43 GB (55433160 blocks) Announced size: 1.91 TB (4096000000 blocks) Module: 2.00 TB (2^41 Bytes) Approximate cache size: 511.00 MB (1046528 blocks), need-reset=no Physical block size: 512.00 Byte (2^9 Bytes) Probe time: 1:11:42 ➜ nbilal