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In order to mount a RAID50 or RAID51 volume as Single-user Write on a
TerraBlock client workstation, there are specific conditions that must be met:
The client must be a Windows 7 or higher 64 bit system.
The client must have specific Facilis drivers installed in order to
properly mount the RAID50 or RAID51 volume as Single-user Write.
Contact
Facilis Customer Support
to obtain the required drivers
and additional details for mounting RAID50 or RAID51 volumes
as Single-user Write on TerraBlock clients.
ATTO Power Center (Windows / Macintosh):
Unlike RAID50 or RAID51 volumes, ATTO Power Center External Tandem volumes
are intended for use as Single-user Write only. When mounting an ATTO Power
Center External Tandem volume for the first time, all Tandem members will appear
as raw devices until the ATTO Power Center software is launched and the Tandem
span is created. ATTO Power Center External Tandem volumes are not cross-
platform when mounted as Single-user Write. See pg. 102
Appendix B – Working
with External Tandem Volumes
for more information.
Creating Tandem Volumes
In the ‘Create Volume’ dialog, the Tandem button allows selection of multiple drive
groups. Drive groups may be on the same TerraBlock Server, (if working with a
TerraBlock 24D (24 drives)), different servers (in a multi-server workgroup) or TX16
Expansion Chassis’. The resulting volume or set of volumes will depend on how many
groups were selected when creating of the volume.
Internal Tandem
Internal Tandem volumes use both groups
from the same server (24 drives). Here,
groups 1 and 2 from the “TERRABLOCK24D”
server are automatically selected when
choosing the ‘Tandem’ option. The
TerraBlock Manager will create a single
volume spanning the two drive groups
selected, and give the resulting volume a
designation of “1,2” in the ‘Group’ column of
the Volumes Tab. Volumes are managed the
same way, whether they are a single group
or Tandem volume.
There is no external software necessary to
use Internal Tandem volumes, and this is the
highest-performance volume that can be
created on a 24D server. RAID5 is the only
option when creating an Internal Tandem
volume.
