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Table 1.1
SAS RAID Controller Array Limitations
Specification
Maximum drives per
controller
Maximum hot spares
per controller
Maximum spans per
virtual drive
Maximum enclosures
per port**
Number of ports
1-12
16*
16*
8
8
8
8
2
2
1
2
* - Can support up to 64 devices, but only 16 can be used in a RAID
configuration.
** - Assumes one Storage Enclosure Processor (SEP) per enclosure.
The maximum numbers in
devices you have connected to the RAID controller. For example, the
maximum number of drive groups is equal to the number of drives
supported by the controller. Thus, for the SAS 9240-4i RAID controller,
the maximum number of drive groups per controller is eight, which is
based on the maximum number of physical devices that can be
connected. In addition, the maximum number of hot spares per controller
is equal to the maximum number of drives per controller.
Although you can have up to 16 virtual drives per drive group and up to
16 drive groups per controller (depending on the controller), there is a
limit of 64 virtual drives per controller.
These RAID controllers support 64-bit logical block addressing (LBA),
which makes it possible to connect a large number of drives to the RAID
controller, directly and through expanders. However, the actual number
of drives that you can attach depends on the limits listed in
rather than by actual RAID volume capacity.
Overview
Copyright © 2009 by LSI Corporation. All rights reserved.
32
32
32
32
32
32
8
8
8
2
2
2
1
2
2
Table 1.1
depend on how many physical
240
240
240
240
8
8
10
10
2
2
Table 1.1
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