Replacing A Failed Disk Under FreeBSD

We just had a server with a failed hard disk, thanks to smartmon which sent a mail:

This email was generated by the smartd daemon running on:

  host name: hostN.rootaid.de
  DNS domain: rootaid.de
  NIS domain: [None]

The following warning/error was logged by the smartd daemon:

Device: /dev/ad6, not capable of SMART self-check

Device info:
XX3000XX001-1XX166, S/N:X1X0X1XX, WWN:5-000X50-04XXX9347, FW:CC43, 3.00 TB

For details see host's SYSLOG.

You can also use the smartctl utility for further investigation.
No additional email messages about this problem will be sent.

Ok, hey it’s Friday and… after my provider replaced the disk and booted the system we just have to tell GEOM to use the new disk:

Mirror is degraded

root@host # gmirror status
Name      Status    Components
mirror/gm DEGRADED  ad4 (ACTIVE)

Forget failed disks

root@host # gmirror forget gm0

Check again

root@host # gmirror status
Name      Status    Components
mirror/gm COMPLETE  ad4 (ACTIVE)

Insert new disk drive into mirror

root@host # gmirror insert gm/dev/ad6

Tadaa

The RAID-1 is rebuilding!

root@host # gmirror status
Name      Status    Components
mirror/gm DEGRADED  ad4 (ACTIVE)
                    ad6 (SYNCHRONIZING, 0%)

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