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StorView RAID Module
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6.1.3 Optimization and Drive Selection for RAID 5 and 6
Typical RAID 5 or 6 implementations require a number of steps to write the data to the drives. In order to
optimize your system performance based on the type of writes you expect in your operation, we have
provided detailed information on optimizing the performance using full strip write operations in an
appendix. If you intend to setup a RAID 5 or 6 disk array and wish to consider optimum performance, you
will need to consider the number of data drives, parity drives, and chunk size. For a review,
see
”Optimizing Write Performance” beginning on page 185. Additional information is provided at the
appropriate step during configuration.
6.2 Create the Array
Configuring an array involves a few steps from one window, the Create Array window. From this window,
disk drives are selected then the parameters for the array are set through drop-down menu selections or
check boxes. The parameters define the details of the array and are saved in the configuration file.
The configuration file is stored on all disk drives that are members of the array (regardless of whether the
drives are in multiple enclosures). No changes are made to the configuration until the current process is
saved, so it is possible to quit at any time without affecting the current configuration.
After making changes to your configuration, be sure to make a new backup copy of the configuration file,
see 6.6 ”Saving the Configuration” beginning on page 65. The ability of making a backup copy of the
configuration allows you to quickly recover from a damaged configuration that was not self healing, and
restore everything to the point in time when the configuration was last saved. This preserves the definition
of the arrays, logical drives, Snapshots, SAN LUN Mappings and controller parameter settings.
Caution A damaged configuration could result in loss of data.
1 On the Tool Bar click the Create Array icon.
Figure 6–1 Main Screen (RS-4835-F4-5404E Shown)