User's Manual


Supported RAID Levels
Table A-25. RAID Levels Supported by the PERC 5/E, PERC 5/i, PERC 6/E, PERC 6/I, PERC 6/I Modular, and CERC 6/I Controllers

Read, Write, Cache and Disk Cache Policy
Table A-26. Read, Write, and Cache Policy Supported by the PERC 5/E, PERC 5/i, PERC 6/E, PERC 6/I, PERC 6/I Modular, and CERC 6/I
Controllers

Minimum Stripe Size
8k
8k
8k
8k
8k
8k
Maximum Stripe Size
128k
128k
1MB
1MB
1MB
1MB
Maximum Number of Virtual Disks per Disk Group
16
16
16
16
16
16
Maximum Number of Physical Disks that Can Be Concatenated
NA
NA
NA
NA
NA
NA
Maximum Number of Physical Disks in a RAID 0
32
32
32
32
32
32
Maximum Physical Disks in a RAID 1
2
2
2
2
2
2
Maximum Number of Physical Disks in a RAID 5
32
32
32
32
32
32
Maximum Number of Physical Disks in a RAID 10
16
16
256
with firmware version 6.1
16
16
16
Maximum Number of Physical Disks in a RAID 50
256
256
256
256
256
256
Minimum Number of Physical Disks that Can Be Concatenated
NA
NA
NA
NA
NA
NA
Minimum Number of Physical Disks in a RAID 0
1
1
1
1
1
1
Minimum Number of Physical Disks in a RAID 1
2
2
2
2
2
2
Minimum Number of Physical Disks in a RAID 5
3
3
3
3
3
3
Minimum Number of Physical Disks in a RAID 10
4
4
4
4
4
4
Minimum Number of Physical Disks in a RAID 50
6
6
6
6
6
6
Maximum number of physical disks in a RAID 6
NA
NA
32
32
32
32
Maximum number of physical disks in a RAID 60
NA
NA
256
256
256
256
Minimum number of physical disks in a RAID 6
NA
NA
4
4
4
4
Minimum number of physical disks in a RAID 60
NA
NA
8
8
8
8

RAID Level

PERC 5/E

PERC 5/I

PERC 6/E

PERC 6/I

PERC 6/I Modular

CERC 6/I
Concatenation
No
No
No
No
No
No
RAID 0
Yes
Yes
Yes
Yes
Yes
Yes
RAID 1
Yes
Yes
Yes
Yes
Yes
Yes
RAID 5
Yes
Yes
Yes
Yes
Yes
Yes
RAID 10
Yes
Yes
Yes
Yes
Yes
Yes
RAID 50
Yes
Yes
Yes
Yes
Yes
Yes
RAID 6
No
No
Yes
Yes
Yes
Yes
RAID 60
No
No
Yes
Yes
Yes
Yes

Read, Write, and Cache Policy

PERC 5/E

PERC 5/I

PERC 6/E

PERC 6/I

PERC 6/I Modular

CERC 6/I
Cache settings
Yes
Yes
Yes
Yes
Yes
Yes
Read Policy
Yes
Yes
Yes
Yes
Yes
Yes
Read Ahead (Enabled)
Yes
Yes
Yes
Yes
Yes
Yes
Adaptive Read Ahead
Yes
Yes
Yes
Yes
Yes
Yes
No Read Ahead (Disabled)
Yes
Yes
Yes
Yes
Yes
Yes
Write Policy
Yes
Yes
Yes
Yes
Yes
Yes
Write Back (Enabled)
Yes
Yes
Yes
Yes
Yes
Yes
Write Through (Disabled)
Yes
Yes
Yes
Yes
Yes
Yes
Force Write Back (Enabled Always)
Yes
Yes
Yes
Yes
Yes
Yes
Write Cache Enabled Protected
No
No
No
No
No
No
Cache Policy
No
No
No
No
No
No
Disk Cache Policy
Yes
Yes
Yes
Yes
Yes
No
Cache I/O
No
No
No
No
No
No
Direct I/O
No
No
No
No
No
No