A TrueNAS dataset is a file system within a data storage pool. Datasets can contain files, directories, and child datasets, and have individual permissions or flags.
Datasets can also be encrypted. TrueNAS automatically encrypts datasets created in encrypted pools, but you can change the encryption type from key to passphrase. You can create an encrypted dataset if the pool is not encrypted and set the type as either key or passphrase.
Which is it, bit or byte? And what is the difference between a bit or a byte?
Both bit and byte are basic measurements for computerized data but they represent different measurements.
A bit is the smallest unit of measure for computerized storage, and when combined with a time measurement such as seconds, becomes the common basis for determining how fast raw data bits transfer across a network, as in bits per second (bps).
This procedure only applies to disks with a ZFS storage pool. To import disks with different file systems, see Import Disk. ZFS pool importing works for pools that were exported or disconnected from the current system, created on another system, and pools to reconnect after reinstalling or upgrading the TrueNAS system. To import a pool, go to Storage > Pools > ADD.
Do I need to do anything different with disks installed on a different system?
After creating a data storage pool, there are a variety of options to change the initial configuration of that pool. Changing a pool can be disruptive, so make sure you are aware of existing resources on the system and consider backing up any stored data before changing the pool. To find an existing pool, log in to the web interface and go to Storage > Pools.
The current status and storage usage of each pool is shown.
A ZFS Volume (Zvol) is a dataset that represents a block device. These are needed when configuring an iSCSI Share.
To create a zvol in a pool, go to Storage > Pools then click and Add Zvol.
Options To quickly create a Zvol with the default options, enter a name for the Zvol, a size, and click SAVE.
See Zvols Screen for more information on zvol settings.
Setting Zvol Block Sizes To set the zvol block size, click ADVANCED OPTIONS on the ADD ZVOL screen.
Use the Storage > Pools Add Zvol screen to add a zvol to a pool.
Basic Options
Setting Description Zvol name Enter a short name for the zvol. Using a zvol name longer than 63-characters can prevent accessing zvols as devices. For example, a zvol with a 70-character filename or path cannot be used as an iSCSI extent. This setting is required. Comments Enter any notes about this zvol. Size for this zvol Specify size and value.
A ZFS Volume (zvol) is a dataset that represents a block device or virtual disk drive. TrueNAS requires a zvol when configuring iSCSI Shares. Adding a virtual machine also creates a zvol to use for storage.
Storage space you allocate to a zvol is only used by that volume, it does not get reallocated back to the total storage capacity of the pool or dataset where you create the zvol if it goes unused.
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.
From repurposed systems to highly custom builds, the fundamental freedom of TrueNAS is the ability to run it on almost any x86 computer.
Minimum Hardware Requirements Processor Memory Boot Device Storage 2-Core Intel 64-Bit or AMD x86_64 processor 8 GB Memory 16 GB SSD boot device Two identically-sized devices for a single storage pool The TrueNAS installer recommends 8 GB of RAM. TrueNAS installs, runs, and operates jails. It also hosts SMB shares and replicates TBs of data with less.
The zvol screens and widgets, accessed from the Datasets screen, allow you to add or edit a zvol and manage the volume storage. Zvols are listed on the Datasets screen tree table.
Figure 1: Dataset Tree Table and Zvol Widgets The tree table includes storage space used and available for that zvol (or dataset), encryption status (locked, unlocked, or unencrypted), and the role of that zvol or dataset or what service uses it (i.
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