How Data ONTAP uses continuous media scrubbing to prevent media
errors ........................................................................................................ 40
Increasing storage availability by using ACP ........................................................... 41
Enabling ACP ................................................................................................ 42
The ACP subnet ............................................................................................ 43
How you use SSDs to increase storage performance ................................................ 44
SSD life cycle ................................................................................................ 44
Capability differences between SSDs and HDDs ......................................... 45
How ownership for disks and array LUNs works ................................... 47
Why you assign ownership of disks and array LUNs ............................................... 47
What it means for Data ONTAP to own an array LUN ............................................ 47
Why you might assign array LUN ownership after installation ................................ 48
How disks and array LUNs become available for use .............................................. 49
How ownership autoassignment works for disks ...................................................... 50
What autoassignment does ............................................................................ 50
When autoassignment is invoked .................................................................. 50
Examples showing when Data ONTAP can use array LUNs ................................... 51
Managing ownership for disks and array LUNs ..................................... 53
Guidelines for assigning ownership for disks ........................................................... 53
Displaying ownership information ............................................................................ 53
Assigning ownership for disks and array LUNs ....................................................... 55
Modifying assignment of spare disks or array LUNs ............................................... 57
Verifying the existence of two paths to an array LUN in a V-Series system ........... 58
Verifying the existence of two paths with the storage show disk
command ................................................................................................. 58
Verifying the existence of two paths with the storage array show-config
command ................................................................................................. 59
Verifying path failover for array LUNs in a V-Series system .................................. 60
Verifying path failover for array LUNs in a stand-alone system .................. 60
Verifying path failover for array LUNs in an HA pair ................................. 60
Guidelines for SyncMirror pool assignment ............................................................. 61
How you use the wildcard character with the disk command ................................... 61
Managing disks ........................................................................................... 63
Adding disks to a storage system .............................................................................. 63
Replacing disks that are currently being used in an aggregate ................................. 64
Converting a data disk to a hot spare ........................................................................ 65
4 | Data ONTAP 8.0 7-Mode Storage Management Guide
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