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ServeRAID M1215 SAS/SATA Controller for IBM System x User’s Guide
Chapter 1: Overview
Configuration Scenarios
The following figure shows an example of a ServeRAID controller configured with an expander that is connected to
SAS disks, SATA disks, or both.
Figure 2 Example of a ServeRAID Controller Configured with an Expander
1.3.1
Number of Physical Disks Supported
Your configuration planning for your ServeRAID controller depends in part on the number of physical disks that you
want to use in a RAID array. The number of drives in an array determines the RAID levels that can be supported by this
controller. Only one RAID level can be assigned to each virtual disk.
Table 2
shows the minimum number and the
maximum number of drives required for each RAID level.
Table 2 Physical Devices Required for each RAID Level
Raid Level
Minimum # of
Physical Devices
Maximum # of
Physical Devices
0
1
32
1
2
2
5
3
32
10
4
32
50
6
32
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