Sun Microsystems StorEdge 3000 Series, Best Practices Manual

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Chapter 2 Underlying Concepts and Practices 9
Supporting large storage capacities requires advanced planning since it requires
using large logical drives with several partitions each or many logical drives. For
maximum efficiency, create logical drives larger than 2 Tbyte and partition them into
multiple LUNs with a capacity of 2 Tbyte or less.
The largest supported logical drive configuration depends largely upon the cache
optimization setting.
TABLE 2-1
shows the maximum number of disks that can be
used in a single logical drive, based upon the drive size, and the optimization
method chosen.
The maximum capacity per logical drive supported by the RAID firmware is:
■
16 Tbyte with random optimization
■
64 Tbyte with sequential optimization
Since Sun StorEdge 3510 FC arrays and Sun StorEdge 3511 SATA arrays also support
up to 32 logical drives each, it is unlikely these limits will restrict configurations.
Note – Create several logical drives when using configurations with many disks.
Creating a logical drive with a very large number of disks is not advisable.
Maximum Drive Configurations per
Array
TABLE 2-2
lists the maximum number of physical and logical drives, partitions per
logical drive and logical volume, and maximum number of LUN assignments for
each array
.
TABLE 2-1
Maximum Number of Disks per Logical Drive
Drive Size
FC (Random or
Sequential Optimization) SATA
(Random Optimization) SATA
(Sequential Optimization)
36 Gbyte 108 n/a n/a
73 Gbyte 108 n/a n/a
146 Gbyte 108 n/a n/a
250 Gbyte n/a 66 72
400 Gbyte n/a 41 72