Capacity Expansion with the SnapServer DX
With the numerous options available to store, protect and share data across a
network, there are many considerations to make when selecting a storage
server. Being that it is crucial to select a storage system that can grow with
your data, and at the same time minimize downtime, one of the most important
considerations is storage scalability. The SnapServer DX series introduces
DynamicRAID, the industry’s most automated form of data protection and most
non-disruptive form of storage scalability.
Internal Expansion with
Growing the available storage in a SnapServer DX is a simple
process. Install a SnapServer with as few as two hard drives and simply add
more capacity over time by inserting drives into empty slots or replacing
smaller drives with drives of larger capacities. DynamicRAID
the available capacity and data protection depending on the number of drives
inserted and the parity selection chosen
during setup, even when the drives
are of mismatched sizes. All drives present in the SnapServer DynamicRAID set
will then contribute to a single, easy to manage storage pool.
The SnapServer DX series uses LED indicators on the drive bays to
notify the administrator when drives can be removed and replaced, thus
reducing error when adding storage. As long as a drive LED displays a green
light, the drive can be safely removed. Once a new drive is inserted, the
GuardianOS will display that a new drive has been detected; and at that
point, the drive can be added to the existing storage pool and will
automatically grow the amount of available storage to all of the Dynamic
Volumes. Although the RAID builds in the background, the new storage volume
space is instantly available to network users.
Hard Drive Addition
Administrators can add hard drives at any time as long as a SnapServer DX has
empty chassis slots available. Once the GuardianOS detects the new drive, the administrator will have multiple options with which to handle the drive. The new
capacity can be added to an existing storage pool to grow the current
volumes; it can be used to migrate from single or dual parity DynamicRAID
protection, or used to expand an existing snapshot volume.
External Expansion with the SnapExpansion Chassis
For adding storage
beyond the SnapServer head unit, the SnapServer DX Series supports the
attachment of the 2U, 12-bay SnapExpansion DX chassis. The expansion chassis are
attached to the SnapServer using a 6Gb SFF-8088 SAS connection and are
daisy-chained to one another when multiple expansion chassis are utilized.
Each SnapExpansion contains its own DynamicRAID set with associated storage
pool. Although the storage pools and volumes cannot span between chassis for the
purposes of performance and data protection, the SnapServer head unit will
manage all of the storage under a single interface.
The SnapServer DX1
supports up to three of the SnapExpansion DX units for a total of 40 drives and
a maximum capacity of 120TB. When attaching the SnapExpansion DX to the DX1, the
SAS HBA must also be installed to provide the SAS expansion port. The SnapServer
DX2 includes the SAS HBA and supports up to seven expansion chassis for a total
of 96 drives and 288TB.
Protect your data with GuardianOS features such as snapshots, replication
and DynamicRAID; and with multiple expansion options, the SnapServer DX allows
you to pay as you grow and always have the right amount of storage for your