OWC JUPITER CALLISTO
STORAGE CONFIGURATION
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4.2 STORAGE CONFIGURATION
Jupiter Callisto uses ZFS to create and manage its storage. Your Jupiter Callisto has arrived with its storage pre-configured,
but you may wish to change the storage configuration to suit your specific needs.
4.2.1 Creating the Pool
To be able to use your Jupiter Callisto as a storage server, you must first create a pool. In simple terms, a pool is a collection
of all of the drives and RAID sets attached to the Jupiter Callisto. To create a pool, go to the ‘Storage’ tab, then click on the
‘Add/Extend ZFS Pool’ button to bring up the following window (
Figure 4.2.1
).
Create a name for your pool, then move to the ‘pool layout’ section below that. Notice that all of the disks not currently
members of a RAID are listed as ‘available disks’ and are grouped together by capacity. If you click on the ‘+’ icon next
to the list of available disks of one capacity, those disks will be added to the ‘pool layout’ section with an automatically
selected RAID configuration. This configuration is simply a default and can be changed easily. Click on the dropdown
menu on the left to modify the RAID level.
Each row in the chart to the right represents one RAID set. Each numbered block represents one disk. In order to create
more than one RAID set out of your group of disks, simply click on the circle icon at the lower right hand of the chart and
drag it down to create a new row. Dragging the circle icon from left to right will increase the number of disks assigned to
each RAID set. If you create multiple RAID sets, you can modify the RAID level of each by clicking the dropdown menu to
the left of each row (it is recommended to use the same RAID level for each RAID set in the pool). Each RAID set of the
same RAID level will be striped together automatically when the pool is created. It is recommended to create the pool
using multiple identical RAID sets rather than one large RAID. This will increase performance and reduce recovery time
after a disk failure. The total usable capacity of the pool is displayed at the top of the ‘pool layout’ section.
4.2.2 ZFS RAID Levels
ZFS has its own version of RAID, including some levels that are roughly equivalent to standard RAID levels and some that
are unique to ZFS.
• Mirror —
This RAID level is equivalent to RAID 1, except that you can choose more than two disks to be members of the
Figure 4.2.1