In
this 5 part series, we:
Part
1: Configure iSCSI on Clustered Data ONTAP
Part
2: Set up Windows Server 2012 with iSCSI and MPIO, NetApp Host Utilities,
NetApp DSM for MPIO
Part
3: How to install NetApp SnapDrive for Windows 7.0
Part
4: Use NetApp SnapDrive for Windows to create a disk and attach via iSCSI
Part
5: Use the NetApp Data ONTAP DSM to manage paths and modify MPIO path policies
Part 5: How to use the NetApp Data ONTAP DSM 4.0.1 to manage paths
and modify MPIO path policies
5.1) Open the Computer Managemant MSC
(Start> Run> compmgmt.msc)
5.2) Select ‘Data ONTAP DSM Management’
Image:
Data ONTAP DSM 4.0.1 showing two Active/Optimized paths!
5.3) Select the disk created in Part 4
In the ‘Actions’ pane click ‘Properties’
Review the available Default Load Balancing
Properties
Click OK
Image:
Data ONTAP DSM 4.0.1 Properties
5.4) Review the information on the I/O
Statistics tab
Image:
Data ONTAP DSM 4.0.1 I/O Statistics
Appendix
A: Data ONTAP DSM 4.0.1 Default Load Balance Properties
Auto
Assign
Failover
Only
Round
Robin
Round
Robin with Subset
Least
Weighted Paths
Least
Queue Depth
Note: “The default load balance policy
setting determines the load balance policy assigned to new virtual disks.
Changing this setting has no effect on existing virtual disks.”
Either disconnect and then reconnect disk (using SnapDrive) or reboot the
server to get the new load balancing policy to apply.
Image: Data
ONTAP DSM 4.0.1 disk with the ‘Round Robin’ Load Balance Policy
Appendix
B: Data ONTAP DSM 4.0.1 Available I/O Statistics
Disk ID
Path ID
Operational
State
Total
Reads
Total
Writes
Total
Bytes Read
Total
Bytes Written
Total
Failovers
Total I/O
Errors
Total
Outstanding Requests
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