-A ZRS disk lets you recover from failures in availability zones. If a zone went down and your virtual machine (VM) wasn't affected, then your workloads will continue running. But if your VM was affected by an outage and you want to recover before it's resolved, you can either take a snapshot of the disk and make a new disk in a healthy zone, or copy the disk to a healthy zone. Once you've got a disk in a healthy zone, attach it to a VM in that zone. ZRS disks can also be shared between VMs for improved availability with clustered or distributed applications like SQL FCI, SAP ASCS/SCS, or GFS2. A shared ZRS disk can be attached to primary and secondary VMs in different zones to take advantage of both ZRS and [availability zones](../availability-zones/az-overview.md). If your primary zone fails, you can quickly fail over to the secondary VM using [SCSI persistent reservation](disks-shared-enable.md#supported-scsi-pr-commands).
0 commit comments