Zpool wizard

<span style="font-size:small;"><span style="font-family:arial,helvetica,sans-serif;"><tt><cite>This function allows you to create pools, that will be named as "'''zpools'''".</cite></tt>

<tt><cite>Pools are used for grouping disks that belong to storages.</cite></tt>

<tt><cite>'''1. - CREATE DATA GROUP''' - provides information of all hard drives that are connected to the storage server. <span style="white-space: pre-wrap;">To add first Data Group to your zpool please </span>select disks <span style="white-space: pre-wrap;">on the list on the left, </span>select redundancy <span style="white-space: pre-wrap;">type and click "Create group" button.</span></cite></tt>

<tt><cite><span style="white-space: pre-wrap;">It is also needed, to define to redundancy level for the created group. Available redundancy groups are :</span></cite></tt></span></span>

• <span style="font-size:small;"><span style="font-family:arial,helvetica,sans-serif;"><tt><cite>Single - each disks works as a single drive</cite></tt></span></span>

• <span style="font-size:small;"><span style="font-family:arial,helvetica,sans-serif;"><tt><cite>Mirror - All data that are stored on disk "A" will be automatically mirrored on the disk "B". At least two disks are needed for creating a mirror. They need to be the same size</cite></tt></span></span>

<span style="font-size:small;"><span style="font-family:arial,helvetica,sans-serif;"><tt>'''2. CREATE WRITE LOG''' - allows to configure the write log function, using a redundancy level (mirror or single drive).A separate-intent log device. If more than one log device is specified, then writes are load-balanced between devices. Log devices can be mirrored. However, raidz vdev types are not supported for the intent log.</tt>

<tt>3.CREATE READ CACHE - A device used to cache storage pool data. A cache device cannot be configured as a mirror or raidz group.These devices provide an additional layer of caching between main memory and disk. For read-heavy workload,where the working set size is much larger than what can be cached in main memory, using cache devices allow much more of this working set to be served from low latency media. Using cache devices provides the greatest performance improvement for random read-workloads of mostly static content.</tt>

<tt>'''4. CREATE SPARE DISK''' - <span style="color: rgb(0, 0, 0);"> A special pseudo-vdev which keeps track of available hot spares </span><span style="color: rgb(0, 0, 0);">for a pool.</span><span style="color: rgb(0, 0, 0);">ZFS allows devices to be associated with pools as "hot spares". These</span><span style="color: rgb(0, 0, 0);"> devices are not actively used in the pool, but when an active device</span><span style="color: rgb(0, 0, 0);"> fails, it is automatically replaced by a hot spare. To create a pool with</span><span style="color: rgb(0, 0, 0);"> hot spares, specify a "spare" vdev with any number of devices.</span><span style="color: rgb(0, 0, 0);">Once a</span><span style="color: rgb(0, 0, 0);"> spare replacement is initiated, a new "spare" vdev is created within the</span><span style="color: rgb(0, 0, 0);"> configuration that will remain there until the original device is </span><span style="color: rgb(0, 0, 0);">replaced. At this point, the hot spare becomes available again if another</span><span style="color: rgb(0, 0, 0);"> device fails.</span><span style="color: rgb(0, 0, 0);">If a pool has a shared spare that is currently being used, the pool can</span><span style="color: rgb(0, 0, 0);"> not be exported since other pools may use this shared spare, which may </span><span style="color: rgb(0, 0, 0);">lead to potential data corruption.</span><span style="color: rgb(0, 0, 0);">Spares cannot replace log devices.</span>

'''5. ZPOOL PROPERTIES''' -  allows to define a pool called as a " Z'''pool name ". This name '''<span style="color: rgb(102, 102, 102); line-height: 13px; background-color: rgb(251, 251, 251);">of the zpool  will be used in the system.</span></tt>

<tt>'''6. SUMMARY -''' sumarizes the zpool configuration : groups of disks that are used for data, and other groups of disks, used for caching, spare, etc.</tt></span></span>