Dell EMC PowerVault MD Series Administrator's Manual page 9

Manually creating a consistency group Snapshot Virtual Disk repository......................................................... 132
Disabling Snapshot Virtual Disk or consistency group Snapshot Virtual Disk................................................... 133
Re-creating a Snapshot Virtual Disk or consistency group Snapshot Virtual Disk........................................... 134
Changing the modification priority of an overall repository virtual disk............................................................. 135
Changing the media scan setting of an overall repository virtual disk...............................................................135
Changing the pre-read consistency check setting of an overall repository virtual disk...................................136
Increasing capacity of overall repository................................................................................................................ 137
Decreasing the capacity of the overall repository................................................................................................ 138
Performing revive operation....................................................................................................................................139
11 Premium feature-virtual disk copy...........................................................................................................140
Types of virtual disk copies............................................................................................................................................ 141
Offline copy................................................................................................................................................................ 141
Online copy................................................................................................................................................................ 141
Creating a virtual disk copy for an MSCS shared disk................................................................................................141
Virtual disk read/write permissions.............................................................................................................................. 142
Virtual disk copy restrictions......................................................................................................................................... 142
Creating a virtual disk copy........................................................................................................................................... 142
Setting read/write permissions on target virtual disk.......................................................................................... 143
Before you begin.......................................................................................................................................................143
Virtual disk copy and modification operations.......................................................................................................143
Create copy wizard...................................................................................................................................................143
Failed virtual disk copy............................................................................................................................................. 144
Preferred RAID controller module ownership..............................................................................................................144
Failed RAID controller module....................................................................................................................................... 144
Copy manager.................................................................................................................................................................144
Copying the virtual disk................................................................................................................................................. 144
Storage array performance during virtual disk copy.................................................................................................. 145
Setting copy priority.......................................................................................................................................................145
Stopping a virtual disk copy.......................................................................................................................................... 146
Recopying a virtual disk................................................................................................................................................. 146
Preparing host servers to recopy virtual disk........................................................................................................146
Recopying the virtual disk........................................................................................................................................147
Removing copy pairs...................................................................................................................................................... 147
12 Device Mapper multipath for Linux............................................................................................................148
Overview......................................................................................................................................................................... 148
Using Device Mapper Multipathing Devices (DMMP).............................................................................................. 148
Prerequisites..............................................................................................................................................................148
Device Mapper configuration steps............................................................................................................................. 149
Scan for newly added virtual disks......................................................................................................................... 149
Display multipath device topology using multipath command............................................................................ 149
Create fdisk partition on multipath device node...................................................................................................150
Add new partition to Device Mapper.....................................................................................................................150
Create file system on Device Mapper partition..................................................................................................... 151
Mount a Device Mapper partition........................................................................................................................... 151
Contents 9