There are Several Primary Challenges with Traditional RAID:
Lock-in of RAID Levels
To change RAID levels, most storage arrays require the data to be moved off, reconfigured, and then moved back on. If you want to move to RAID 6 from RAID 5 for protection against two drive failures, you need to reinitialize and start over. This process could take days to complete.
Lack of Expandability
Once drives are configured into a RAID pool, expandability is impossible unless you have a lot of time, or experience. If you want to add more storage capacity, the solution is to create a new RAID pool, leaving you with another chunk of storage to manage – or you can just reinitialize and start over.
Drive Failures Create Big Risks
When a drive fails, most RAID implementations enter a state where data loss will occur if another drive falters before the user replaces the failed drive. Also, performance is hampered when in this debilitated state.
BeyondRAID: It’s RAID, Only Better
- Supports Two Drives (RAID 1)
- Supports Three Drives (RAID 5)
- Supports Four Drives or More (RAID 5 & 6)
- Single-Disk Redundancy (RAID 5)
- Dual-Disk Redundancy (RAID 6)
- Mixed Drive Utilization
- Thin Provisioning
- Instant Expansion
- Smart Volumes
- Automatic Protection Levels
- Virtual Hot Spare
- Data Aware
- Drive Re-ordering
- Everyone Else with RAID
*Some vendors (e.g. Synology) offer some options, though they require manual choices / configuration.