Best Practices for the Sun StorEdge 3320 SCSI Array and Sun StorEdge 3310 SCSI Array
7
When Designing a Storage Solution for an
Existing Environment
The first method works well for existing environments. Start by identifying the
number of servers that can immediately benefit from the storage the array provides.
When Designing a New Storage Solution
Another technique involves matching a particular environment to one of the best
practices solutions described in this document. This approach works particularly
well with new deployments, but it can be used for existing environments as well.
Take note of special features, such as the number of connections between servers and
storage. While these solutions do not match every environment exactly, use the
closest one as a design blueprint that can be customized to suite your particular
environment. For environments with different server configurations, choose the
solution that best matches the servers whose applications are mission-critical or most
important.
General Configuration Considerations
The entry-level configuration for a SCSI array uses only one RAID controller. If this
configuration is used, two single-controller arrays should use host-based mirroring
to ensure high reliability, availability, and serviceability (RAS).
Note –
Refer to VERITAS Volume Manager or an equivalent host mirroring
application to set up the optimum configuration with single-controller arrays.
Use dual-controller arrays to avoid a single point of failure. A dual-controller SCSI
array features a default active-to-active controller configuration. This configuration
improved application availability because, in the unlikely event of a controller
failure, the array automatically fails over to a second controller, resulting in no
interruption of data flow. Single-controller arrays are provided for small
configurations requiring fast, scratch disk, as in EDA environments.
Sun StorEdge 3000 Family SCSI arrays are extremely flexible, but when designing
storage solutions keep them as simple as possible. Keep the following suggestions in
mind when designing the configuration of a SCSI storage system:
■
To ensure power redundancy, connect the two power modules to two separate
circuits, such as one commercial circuit and one UPS.
