This documents the steps to replace a failed drive in a mirror configuration in FreeNAS 11.1-U7. This process is really easy with FreeNAS.<\/p>\n
This scenario is in contrast to replacing a failed drive before it fails<\/a> (in a Centos “ad-hoc” ZFS system).<\/p>\n (Note: at this time, FreeNAS 11.3-U4.1 is available. It has a different GUI from the description below.)<\/p>\n First, confirm FreeNAS agrees that the drive is dead. Your alert in the upper right corner will be showing red “Critical”.<\/p>\n Second, physically replace the drive with an equal-or-larger sized drive.<\/p>\n Third, from the FreeNAS 11 GUI:<\/p>\n At this point, all of the disks should show “ONLINE”, and the top status changes to “Resilver”. Extra tidbit: the 4TB drive resilver (2.7TB used) took 8h35m, which is 91MB\/second.<\/p>\n","protected":false},"excerpt":{"rendered":" This documents the steps to replace a failed drive in a mirror configuration in FreeNAS 11.1-U7. This process is really easy with FreeNAS. This scenario is in contrast to replacing a failed drive before it fails (in a Centos “ad-hoc” … Continue reading \n
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note: the failed disk will probably have a number, like 11421970349345372421, instead of a device, like ada4p2
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after you do this, a “Replace” button appears at the bottom of the screen<\/p>\n
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after you do this, a dialog “Replacing disk 11421970349345372421”
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The drop-down dialog will be pre-populated with the newly-inserted disk, by device name, like ada5 (X.Y TB)<\/p>\n
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after you do this, the dialog changes to “Please wait…”
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after about 60 seconds, the dialog closes, and returns to your pool status\n<\/ol>\n
\nEventually, a “Progress: NN.nn%” will start showing the resilvering status of the drive.
\nYou can also run “zpool status” to see the resilver progress.<\/p>\n