Accusys ExaSAN SW-08 - Manual (Page 40)

4. How to Use
User Guide Page 4-5
Read Chapter 5 “RAID Overview” and Chapter 6 “Xsan Overview,” for a better understanding of the
related terminologies before you proceed.
RAID LEVEL:
1. For Xsan configuration, this field is used to specify the raid level of your data volume. Although “R6”
is supported here, it is very rarely used. Accusys recommends using “R5” for your RAID
configuration. The following explanation is assumes a “R5” selection of this field.
2. Once you make your data volume raid level selection from the drop-down list, the appropriate raid
level of your metadata volume will be set automatically by the system.
3. Based on the number of your storage system(s), the metadata raid level is set according to the rules
described in the “SAN Software” field below.
4. For non-Xsan configuration such as the ExaSAN LUN Masking application, or Xsan configuration
without MDC, this field is used to specify the raid level of all your storage system(s). See Section
4.2.3, “The ExaSAN LUN Masking Function,” and explanation of the “SAN Software” field below
for additional information.
SAN Software:
1. None: If you will be using the switch’s ExaSAN LUN Masking application, or you will not be
installing any SAN management software, select this option from the drop-down list. The system will
automatically set the raid level of all your RAID system(s) according to your selection of the RAID
LEVEL field above. See Section 4.2.3, “The LUN Masking Function,” for additional information.
2. SAN without Metadata: If you are using a SAN management software such as MetaSAN, FibreJet or
SANmp which does not required a Metadata Controller, select this option from the drop-down list.
The system will automatically set the raid level of all your RAID system(s) according to your
selection of the RAID LEVEL field above.
3. SAN with Metadata: If you are using a SAN management software such as Xsan, Stornext or BWFS
which requires a Metadata Controller, select this option from the drop-down list. The system will set
the raid levels of your metadata and data volumes according to your selection of the RAID LEVEL
field above, and the following rules: