Drives
For SAN Volume Controller 2145-SV1 and SAN Volume Controller 2145-DH8 , the system supports flash drives, enterprise, and nearline class drives. A drive object represents the physical drive. The system creates this object automatically when a supported drive is detected and a drive ID is assigned.The system supports a range of enterprise-class, nearline-class or flash drives. A drive object represents the physical drive. The system creates this object automatically when a supported drive is detected and a drive ID is assigned.
- Tier 0 flash drives are high-performance flash drives that process read and write operations and provide faster access to data than enterprise or nearline drives. For most Tier 0 flash drives, as they are used the system monitors their wear level and issues warnings when the drive is nearing replacement.
- Tier 1 flash drives are lower-cost flash drives, typically with larger capacities, but slightly lower performance and write endurance characteristics. As these drives are used, the system monitors their wear level and issues warnings when the drive is nearing replacement.
- Enterprise disks are disk drives that are optimized for performance.
- Nearline disks are disk drives that are optimized for capacity.
When a drive is moved between drive slots, the drive ID is maintained unless its Use property is Unused. The Use attribute, which is specified on the chdrive command, determines if the drive can be formed into an array.