Yesterday i found out than one the Samsung disks has bad sectors (very common to this drive. It's the third one i catch with bad sectors ): Code (text): freenas# zpool status pool: volume1 state: ONLINE status: One or more devices has experienced an unrecoverable error. An attempt was made to correct the error. Applications are unaffected. action: Determine if the device needs to be replaced, and clear the errors using 'zpool clear' or replace the device with 'zpool replace'. see: http://www.sun.com/msg/ZFS-8000-9P scrub: none requested config: NAME STATE READ WRITE CKSUM volume1 ONLINE 0 0 0 raidz1 ONLINE 0 0 0 gptid/be4f7e18-91d9-11e0-869c-f46d04923303 ONLINE 56.8K 14.3M 0 gptid/bea6a51b-91d9-11e0-869c-f46d04923303 ONLINE 0 0 0 gptid/bf1702f1-91d9-11e0-869c-f46d04923303 ONLINE 0 0 0 gptid/bf6feb92-91d9-11e0-869c-f46d04923303 ONLINE 0 0 0 gptid/bfd28ef2-91d9-11e0-869c-f46d04923303 ONLINE 0 0 0 errors: No known data errors So, my question now is: what are the best steps to take now to replace this disk ? What i want to know, is the sequence of commands to give on the command line or steps to take in the GUI. Regards.