Intel® RAID Controller RS2BL080 Hardware User’s Guide 5
— Optional battery backup for cache memory.
SAS/SATA Features of the LSISAS2108 Controller
• Provides eight independent phys, each supporting 6-Gbps and 3-Gbps SAS data
transfers per PHY.
• Scalable interface that supports up to 32 physical devices and 64 logical devices via
expanders.
• Supports SSP to enable communication with other SAS devices.
• Supports SMP to communicate topology management information.
• Supports single PHY or wide ports consisting of 2, 3, or 4 PHYs within a single
quad port.
• Allows addressing of multiple SATA targets through an expander if using SATA 2.0-
compliant hard disk drives.
• Allows multiple initiators to address a single target (in a fail-over configuration)
through an expander.
Note: All expander features will not be available at launch.
Online Capacity Expansion and RAID Level Migration Rules
• Migration must occur to the same or larger capacity configuration.
• Migration cannot occur if there is more than one virtual disk in a logical array.
• Migration and OCE cannot be done on Spanned Arrays (RAID 10, 50, 60).
• Migrations supported are RAID 1 to RAID 0, RAID 5 to RAID 0, RAID 6 to RAID
5, and RAID 6 to RAID 0.
• With OCE, migrations supported are RAID 0 to RAID 1, RAID 0 to RAID 5, RAID
5 to RAID 6, RAID 1 to RAID 6, and RAID 1 to RAID 5.
Beep Codes
• Short beep (1 second on, 1 second off): Array has degraded but no data has been
lost.
• Long beep (3 seconds on, 1 second off): Array has failed and data has been lost.
• Short beep (1 second on, 3 seconds off): Using hot spare in rebuild; alarm will
continue during rebuild with a different sound at completion.
To disable the alarm, choose Disable Alarm. To enable the alarm, choose Enable Alarm
To disable the alarm only until the next event or until next power cycle, choose Silence
Alarm.
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