Avago Technologies MegaRAID SAS 8204ELP - Manual (Page 25)

Summary of SAS RAID Controller Characteristics 1-11
Copyright © 2007 by LSI Corporation. All rights reserved.
Table 1.1 lists the array limitations for the 1078-based SAS RAID
controllers.
* - Assumes one Storage Enclosure Processor (SEP) per enclosure.
** - Although the MegaRAID SAS 8888ELP RAID controller has two
internal and two external ports, only two ports can be used at one time.
The maximum numbers in Table 1.1 depend on how many physical
devices you have connected to the RAID controller. For example, the
maximum number of arrays is equal to the number of physical disks
supported by the controller, up to a limit of 128 arrays per controller.
Thus, for the SAS 8704ELP RAID controller, the maximum number of
arrays per controller, eight, is based on the maximum number of physical
devices that can be connected. The SAS 8704ELP RAID controller
Table 1.1 SAS RAID Controller Array Limitations
Specification
SAS 8704ELP
RAID Controller SAS 8708ELP
RAID Controller SAS 8708EM2
RAID Controller SAS 8880EM2
RAID Controller SAS 8888ELP
RAID Controller
Maximum virtual
disks per
controller 64 64 64 64 64
Maximum arrays
per controller 8 16 16 128 128
Maximum virtual
disks per array 16 16 16 16 16
Maximum
physical devices
per array 8 16 16 32 32
Maximum
physical devices
per controller 8 16 16 240 240
Maximum hot
spares per
controller 8 16 16 240 240
Maximum spans
per virtual disk 4 8 8 8 8
Maximum
enclosures per
port* 3 3 3 16 16
Maximum ports 1 2 2 2 2**