Sas Array Limitations; Serveraid M5014/M5015 Sas/Sata Controller Array Limitations - IBM ServeRAID M5014 User Manual

1.6.2

SAS Array Limitations

This section describes the array limitations of the controllers. These
include limitations such as the number of physical disks supported, the
maximum number of disks per controller, and the maximum number of
virtual disks allowed per controller.
Table 1.2 lists the array limitations for the ServeRAID M5014 and
ServeRAID M5015 controllers.
Table 1.2 ServeRAID M5014/M5015 SAS/SATA Controller Array
Limitations
Specification
Maximum number of disks per controller
Maximum number of arrays per controller
Maximum number of virtual disks per array
Maximum number of physical devices per array
Maximum number of physical devices per controller
Maximum number of hot spares per array
Maximum number of spans per virtual disk
Maximum number of ports
Maximum number of enclosures per port
Note: The maximum number of hot spares per array is equal to
the maximum number of physical drives per array.
The controller supports 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 the actual RAID volume capacity.
The maximum numbers in
devices you have connected to the controller. For example, though you
can have up to 32 disks per array, and up to 64 arrays per controller, a
limit of 64 disks per controller exists.
Benefits of the ServeRAID M5014 and ServeRAID M5015 Controllers
Table 1.2 depend on how many physical
ServeRAID
M5014/M5015
SAS/SATA Controllers
64
64
16
32
32
32
8
2
N/A
Table 1.2
1-11