Administrator Guide

Failed virtual disk copy.................................................................................................................................................130
Preferred RAID controller module ownership.................................................................................................................130
Failed RAID controller module.......................................................................................................................................... 130
Copy manager..................................................................................................................................................................... 131
Copying the virtual disk......................................................................................................................................................131
Storage array performance during virtual disk copy...................................................................................................... 131
Setting copy priority.......................................................................................................................................................... 132
Stopping a virtual disk copy..............................................................................................................................................132
Recopying a virtual disk.....................................................................................................................................................132
Preparing host servers to recopy virtual disk........................................................................................................... 132
Recopying the virtual disk........................................................................................................................................... 133
Removing copy pairs..........................................................................................................................................................133
Chapter 12: Device Mapper multipath for Linux.............................................................................. 135
Overview.............................................................................................................................................................................135
Using Device Mapper Multipathing Devices (DMMP)..................................................................................................135
Prerequisites................................................................................................................................................................. 135
Device Mapper configuration steps.................................................................................................................................136
Scan for newly added virtual disks.............................................................................................................................136
Display multipath device topology using multipath command................................................................................136
Create fdisk partition on multipath device node...................................................................................................... 137
Add new partition to Device Mapper.........................................................................................................................137
Create file system on Device Mapper partition........................................................................................................138
Mount a Device Mapper partition.............................................................................................................................. 138
Ready for use................................................................................................................................................................138
Linux host server reboot best practices......................................................................................................................... 138
Important information about special partitions.............................................................................................................. 138
Limitations and known issues........................................................................................................................................... 139
Troubleshooting................................................................................................................................................................. 140
Chapter 13: Configuring Asymmetric Logical Unit Access................................................................ 141
ALUA performance considerations...................................................................................................................................141
Automatic transfer of ownership......................................................................................................................................141
Native ALUA support on Microsoft Windows and Linux............................................................................................... 141
Enabling ALUA on VMware ESXi .....................................................................................................................................141
Manually adding SATP rule in ESXi 5.x...................................................................................................................... 141
Verifying ALUA on VMware ESXi.................................................................................................................................... 142
Verifying if host server is using ALUA for MD storage array........................................................................................142
Setting round-robin load balancing policy on ESXi-based storage arrays.................................................................. 142
Chapter 14: Premium feature—Remote Replication........................................................................ 143
About asynchronous Remote Replication.......................................................................................................................143
Remote replicated pairs and replication repositories.....................................................................................................143
Types of Remote Replication........................................................................................................................................... 144
Differences between Remote Replication features.................................................................................................144
Upgrading to asynchronous Remote Replication from Remote Replication (legacy).........................................144
Remote Replication requirements and restrictions........................................................................................................144
Restrictions on using Remote Replication................................................................................................................ 145
Setting up Remote Replication........................................................................................................................................ 145
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