6-16 Sun StorEdge 3000 Family Installation, Operation, and Service Manual • May 2004
Note – Logical volumes are unsuited to some modern configurations, such as Sun
Cluster environments, and do not work in those configurations. Use logical drives
instead. For more information see “Summary of Array Configuration” on page 5-6.
For more information about logical drives, spare drives, and RAID levels, refer to the
Sun StorEdge 3000 Family RAID Firmware User’s Guide for your array.
6.1.9 Completing Basic Configuration
In a point-to-point configuration, the last required step is mapping the logical drives
to host LUNs.
In loop mode, you have additional options to pursue, if needed, in addition to the
mapping requirement:
■ Optionally, define any additional partitions for each logical drive. See
“Partitioning a Logical Drive (Optional)” on page 6-31.
■ Optionally, add host FC IDs and more logical drives to create 1024 LUNs.
See:
■ “Planning for 1024 LUNs (Optional, Loop Mode Only)” on page 6-37
■ “Editing and Creating Additional Host IDs (Optional)” on page 6-8
■ “Creating Logical Drives” on page 6-21
For the procedure on the required mapping to LUNs, see “Using the Map Host LUN
Option” on page 6-37.
RAID 5 Striping with distributed parity. This is the best-suited RAID level for
multitasking or transaction processing.The data and parity are striped across
each drive in the logical drive, so that each drive contains a combination of
data and parity blocks.
RAID 1+0 RAID 1+0 combines RAID 1 and RAID 0; mirroring and disk striping. RAID
1+0 allows multiple drive failures because of the full redundancy of the hard
disk drives. If four or more hard disk drives are chosen for a RAID 1 logical
drive, RAID 1+0 is performed automatically.
RAID (3+0) A logical volume with several RAID 3 member logical drives.
RAID (5+0) A logical volume with several RAID 5 member logical drives.
TABLE 6-6 RAID Level Definitions
RAID Level Description
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