Intel SASMF8I User Guide - Page 13
SAS and SATA Features, Redundancy through - firmware
UPC - 735858201360
View all Intel SASMF8I manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 13 highlights
• Auto-resume of initialization or rebuild on reboot (the auto rebuild feature must be enabled before virtual disk creation). • Smart initialization automatically checks consistency of virtual disks if there are five or more disks in a RAID 5 array, which optimizes performance by enabling readmodify-write mode. RAID 5 arrays of only three or overdrives use peer read mode. • Smart Technology predicts failures of drives and electronic components. • Commands are retried at least four times. • Firmware provides best effort to recognize an error and recover from it if possible. • Failures are logged from controller and drive firmware, SMART monitor, and SAF- TE controller. • Failures are logged in Intel® RAID Web Console 2 or CIM, and can be viewed from LEDs. • Multiple cache options provide choice of speed and redundancy: - Disk Write Cache: The data written / (done) signal is returned when data is written to the drive or only to the drive's cache. ✧ On (default): Write back mode enabled. Faster, because it does not wait for the disk, but data will be lost if power is lost. ✧ Off: Write-through mode enabled. Slower, but ensures data is on the disk. - Read Ahead: Predicts the next read will be sequential and buffers this data into the drive's cache. ✧ On: Read Ahead mode enabled. Faster in data sequential read mode but slower in data random read mode. ✧ Off: Non-Read Ahead mode enabled. Always reads from the drive after determining the exact location of each read. • Redundancy through: - Configuration stored in non-volatile RAM and on the drives (COD). - Hot-swap support. SAS and SATA Features • Provides eight independent PHYs, each supporting 3.0 Gbps and 1.5 Gbps SAS and SATA data transfers. • Scalable interface that supports up to eight direct-attached SAS/SATA devices or eight logical devices. • Transfers data using SCSI information units. • Supports SSP to enable communication with other SAS devices. • Supports SMP to communicate topology management information. • Supports single PHY or wide ports consisting of two, three, or four PHYs within a single quad port. Intel® RAID Controller SASMF8I Hardware User's Guide 3