NEC SA2500 User Manual - page 62
User Guide
59
www.nec-computers.com
■ Read Check table to avoid data read errors
■ Support hot swap of failed drives and hot spare
■ Automatic/manual rebuild of hot spare drive
■ Background initialization for instant drive availability
■ Background rebuild, migration and synchronization
■ Error and event logging
■ Variable stripe block size support to meet various application requirements
■ Optimal disk utilization with gigabyte rounding
■ Support for SMART capable drives
■ Synchronization can be scheduled periodically for RAID array data consistency
Advanced Performance Features
■ Multiple caching policy support:
■ Write-back:
- Write-back cache for maximum write performance
- Write-through: Write-through cache for data protection in the event of applica-
tion freeze
- Read ahead: Predictive read ahead caching based on application and data types
■ Packet commands and interrupt coalescing minimize interrupts for better
performance
■ Elevator seek streamlines commands based on where data is located on the disk
■ Load balancing (mirrored RAID array only)
- Web-Based Promise Array Management
■ Creates, deletes, expands, and converts disk arrays remotely
■ Array synchronization and rebuild scheduling
■ Monitors drive, array, and enclosure status and provides online event logging
■ E-mail notification of disk, array, controller or enclosure events (e.g. error or
degrade conditions)