Sun Microsystems StorEdge 3000 Series, Руководство по лучшим практикам

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Chapter 3 Planning Your Storage Architecture 21
Scaling Capacity
Sun StorEdge 3510 FC arrays and Sun StorEdge 3511 SATA arrays are available in a
number of configurations to address a broad range of storage capacities.
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The Sun StorEdge 3510 FC array is available with 15,000 RPM FC disks to address
high-performance requirements.
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The Sun StorEdge 3511 SATA array is available in larger capacities to better
address the needs of the bulk storage market. The additional storage capacity of
the Sun StorEdge 3511 SATA array provides more storage for each server
attached. Larger capacity disks do not effectively support large groups of servers
or users, so spreading the extra capacity among a larger number of servers results
in poor performance and, in extreme cases, possible loss of data.
Base systems include single or redundant controllers and a choice of five or twelve
disks. Additional storage capacity can be dynamically created, starting with a
system with five disks and then adding one or more disks. Expansion units can be
dynamically added to base systems when more storage capacity is required than a
single Sun array can provide.
Note – A Sun StorEdge 3510 FC array can be connected to as many as eight Sun
StorEdge 3510 FC expansion units. Alternatively, Sun StorEdge 3510 FC arrays can
be connected to as many as five Sun StorEdge 3511 SATA expansion units or
combined 3510 and 3511 expansion units. Sun StorEdge 3511 SATA arrays, however,
can only be connected to Sun StorEdge 3511 SATA expansion units. See
“Combining
Sun StorEdge 3510 FC Arrays and Sun StorEdge 3511 SATA Expansion Units” on
page
67 for more information.
Sun StorEdge 3510 FC arrays and Sun StorEdge 3511 SATA arrays remain single
storage systems as expansion units are added, even though there are multiple
interconnected physical units. Expansion units simply add bays to base units to
increase the total number of disks that can be supported.
See “Maximum Number of Disks and Maximum Usable Capacity per Logical Drive”
on page 10 for maximum capacities per RAID configuration.