RAID51 indicates that the virtual volume resides on a primary server
and the volume is mirrored to another Facilis device (TerraBlock
Server or TX16 Expansion Chassis). The primary server is the
TerraBlock Server where the RAID51 volume was created, formatted
and is mounted.
For RAID51 volumes, the RAID5 parity data is independent on each on
each Facilis device. Because the RAID5 data is independent on each
Facilis device, an individual physical drive failure on one device will not
affect any additional devices. In other words, you can have an
individual failed drive on server A and it will not affect server B.
If an individual physical drive failure occurs on one of the Facilis
devices, the necessary RAID5 data is decompressed and used in place
of the missing primary data.
If the individual Facilis device (TerraBlock Server or TX16 Expansion
Chassis) containing the RAID51 mirrored data becomes unavailable,
the RAID51 volume will still be accessible by the primary TerraBlock
Server; however, the volume will only be available as Read-only.
RAID51 volumes require a Windows 7 or Windows 10 TerraBlock
Server and must be created on the TerraBlock Server itself. RAID51
DynaRAID protection is set at volume creation time and cannot be
changed.
If working with a RAID51 volume and one of the individual Facilis
devices where the RAID51 volume was created becomes unavailable,
do not attempt to write additional data to the RAID51 volume.
Any data written to a RAID51 volume while an individual Facilis device
(TerraBlock Server or TX16 Expansion Chassis) is unavailable is
written to disk cache only. Data may appear to write successfully to
the volume, but it is not saved to disk and this data WILL NOT be
accessible when the individual Facilis device becomes available again.
Server – Multiple servers can be employed to increase capacity and bandwidth in a
Facilis network. The names of the servers will be displayed in this column for ease of
volume location. If a volume is spanned across multiple Facilis devices, (RAID50,
RAID51, ATTO Power Center) “Tandem” will be displayed.
Creation Date – This column reports the date and time of volume creation. If
updating from a TerraBlock version prior to version 3.0, the creation date will be the
date of upgrade.
Mount Type – This column displays the volume sharing attribute. Volumes may be
created as either Single-user Write or Multi-user Write.
Note: Multi-user Write volumes require a Shared File System license.
Persistent Mount – This column displays the setting as chosen in the Mount
properties under “Use Persistent Mount”. The choices are ‘R’ and ‘W’. If the column
is empty, the user will be asked to specify how the volume will be mounted at the
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