Multi-Attach & Elastic Volumes
Attach volume to multiple instances
Only Provisioned IOPS SSD volumes
All instances must be in same AZ
Maximum concurrent attachments
Modify size, type, IOPS online
Changes applied without stopping instance
Wait between modifications
Extend file system after resize
Shared storage for clusters
Failover scenarios
Technical prerequisites
Full IOPS immediately available
Enable for specific AZs
Additional charges per DSU
Critical workload recovery
Increased performance, no redundancy
Redundancy, same performance
Performance + redundancy
Configure in operating system
Change size, type, or IOPS via console/CLI
Check modification state in console
Resize partition if size increased
Extend file system to use new space
No standard file systems (ext4, NTFS)
6-hour wait between changes
Cannot decrease volume size
Validate cluster file system behavior
Watch metrics during modifications
Create snapshots before modifications
Schedule during low-traffic periods