ZFS pool importing works for pools exported or disconnected from the current system, those created on another system, and for pools you reconnect after reinstalling or upgrading the TrueNAS system.
The import procedure only applies to disks with a ZFS storage pool. Do I need to do anything different with disks installed on a different system? When physically installing ZFS pool disks from another system, use the zpool export poolname command in the Linux command line or a web interface equivalent to export the pool on that system.
Hard drives and solid-state drives (SSDs) have a finite lifetime and can fail unexpectedly. When a disk fails in a Stripe (RAID0) pool, you must recreate the entire pool and restore all data backups. We always recommend creating non-stripe storage pools that have disk redundancy.
To prevent further redundancy loss or eventual data loss, always replace a failed disk as soon as possible! TrueNAS integrates new disks into a pool to restore it to full functionality.
The wipe function deletes obsolete data off an unused disk.
This is a destructive action and results in permanent data loss! Back up any critical data off the disk to be wiped. To wipe a disk, go to Storage > Disks. Click the chevron_right for a disk to see all the options.
The wipe option is only available when the disk is not in use. Click WIPE to open a dialog with additional options:
Disk Namespace The disk namespace has 12 commands and is based on disk management functions found in the SCALE API and web UI. It provides access to disk management methods through the disk commands.
Disk Commands The following disk commands allow you to view and edit disk properties.
You can enter commands from the main CLI prompt or from the disk namespace prompt.
The SCALE CLI guide is a work in progress!
Hard drives or solid-state drives (SSDs) have a finite lifetime and can fail unexpectedly. When a disk fails in a Stripe (RAID0) pool, the entire pool has to be recreated and all data restored from backups. Creating non-stripe storage pools that have disk redundancy is always recommended.
To prevent further loss of redundancy or eventual data loss, always replace a failed disk as soon as possible! TrueNAS integrates new disks into a pool to restore the pool to full functionality.
To manage disks, go to Storage and click Disks on the top right of the screen to display the Storage Disks screen.
Select the disk on the list, then select Edit.
The Disks page lets users edit disks, perform manual tests, and view S.M.A.R.T. test results. Users may also delete obsolete data off an unused disk.
Performing Manual S.M.A.R.T. Testing Select the disk(s) you want to perform a S.M.A.R.T. test on and click Manual Test.
The Disks screen lists the physical drives (disks) installed in the system. The list includes the names, serial numbers, sizes, and pools for each system disk.
Figure 1: Disks Screen Use the Columns dropdown list to select options to customize disk the information displayed. Options are Select All, Serial (the disk serial number), Disk Size, Pool (where the disk is in use), Disk Type, Description, Model, Transfer Mode, Rotation Rate (RPM), HDD Standby, Adv.
The disk wipe option deletes obsolete data from an unused disk.
Wipe is a destructive action and results in permanent data loss! Back up any critical data before wiping a disk. TrueNAS only shows the Wipe option for unused disks.
Ensure you have backed-up all data and are no longer using the disk. Triple check that you have selected the correct disk for the wipe. Recovering data from a wiped disk is usually impossible.
Advanced settings have reasonable defaults in place. A warning message displays for some settings advising of the dangers of making changes. Changing advanced settings can be dangerous when done incorrectly. Use caution before saving changes.
Make sure you are comfortable with ZFS, Linux, and system configuration, backup, and restoration before making any changes.
The Advanced settings screen provides configuration options for the console, syslog, audit, kernel, sysctl, storage (system dataset pool), replication, WebSocket sessions, cron jobs, init/shutdown scripts, allowed IP addresses, isolated GPU device(s), self-encrypting drives, and global two-factor authentication.
The SCALE CLI guide is a work in progress! New namespace and command documentation is continually added and maintained, so check back here often to see what is new! Snapshot Namespace The pool namespace has 23 commands, and is based on pool creation and management functions found in the SCALE API and web UI. It provides access to storage pool methods through the pool commands.
Snapshot Commands The following pool commands allow you to create new pools and manage existing pools.
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