IBM ServeRAID-MR10is, User Manual

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Configuration Scenarios 1-7
Figure 1.2 Example of a ServeRAID-MR10is Controller Configured
with an LSISASx12 Expander
1.4.1 Number of Physical Drives Supported
Your configuration planning for the ServeRAID-MR10is controller
depends in part on the number of physical drives that you want to use
in a RAID array. The number of drives in an array determines the RAID
levels that can be supported. Only one RAID level can be assigned to
each virtual disk.
Table 1.1 shows the minimum and maximum number
of drives required for each RAID level.
LSISASx12
Flash ROM/
NVSRAM/
SRAM
I
2
C/UART
LSISASx12
SAS/SATA II
Drives
PCI Express Interface
SAS/SATA
Drives
SAS/SATA II
Drives
SAS/SATA II
Drives
SAS/SATA II
Drives
8
SRAM
SRAM SDRAM
Peripheral
Bus
72-bit DDR/DDR2
with ECC
Interface
LSISAS1078
PCI Express to SAS
SAS RAID Controller
Expander
Expander
Table 1.1 Physical Drives Required for Each RAID Level
RAID
Level
Minimum # of
Physical Drives
Maximum # of
Physical Drives
0 1 16
1 2 2
5 3 16
6 3 16
10 4 16