User's Manual
Table A-15. Virtual Disk Specifications for the SAS 5/iR and SAS 6/iR Controllers
Supported RAID Levels
Table A-16. RAID Levels Supported by the SAS 5/iR and SAS 6/iR Controllers
Read, Write, Cache and Disk Cache Policy
Table A-17. Read, Write, and Cache Policy Supported by the SAS 5/iR and SAS 6/iR Controllers
Virtual Disk Specification
SAS 5/IR
SAS 6/iR
Maximum Number of Virtual Disks per Controller
2
2
Minimum Virtual Disk Size
Max
Max
Maximum Virtual Disk Size
2TB
None
Maximum Number of Spans per Virtual Disk
1
1
Maximum Number of Physical Disks per Span
4
10
Minimum Stripe Size
64k
64k
Maximum Stripe Size
64k
64k
Maximum Number of Virtual Disks per Physical Disk
1
1
Maximum Number of Physical Disks in a RAID 0
4
10
Maximum Physical Disks in a RAID 1
2
2
Maximum Number of Physical Disks in a RAID 5
Not Applicable
Not Applicable
Maximum Number of Physical Disks in a RAID 10
Not Applicable
Not Applicable
Maximum Number of Physical Disks in a RAID 50
Not Applicable
Not Applicable
Minimum Number of Physical Disks in a RAID 0
2
2
Minimum Number of Physical Disks in a RAID 1
2
2
Minimum Number of Physical Disks in a RAID 5
Not Applicable
Not Applicable
Minimum Number of Physical Disks in a RAID 10
Not Applicable
Not Applicable
Minimum Number of Physical Disks in a RAID 50
Not Applicable
Not Applicable
Maximum number of physical disks in a RAID 6
Not Applicable
Not Applicable
Maximum number of physical disks in a RAID 60
Not Applicable
Not Applicable
Minimum number of physical disks in a RAID 6
Not Applicable
Not Applicable
Minimum number of physical disks in a RAID 60
Not Applicable
Not Applicable
RAID Level
SAS 5/IR
SAS 6/iR
RAID 0
Yes
Yes
RAID 1
Yes
Yes
RAID 5
No
No
RAID 10
No
No
RAID 50
No
No
RAID 6
No
No
RAID 60
No
No
Read, Write, and Cache Policy
SAS 5/IR
SAS 6/iR
Cache settings
No
No
Read Policy
Yes
Yes
Read Ahead (Enabled)
No
No
Adaptive Read Ahead
No
No
No Read Ahead (Disabled)
Yes
Yes
Write Policy
Yes
Yes
Write Back (Enabled)
No
No
Write Through (Disabled)
Yes
Yes
Force Write Back (Enabled Always)
No
No
Write Cache Enabled Protected
No
No
Cache Policy
No
No