Flexibility Features; Drive Roaming - LSI MegaRAID SAS 9240-4i User Manual

1.6.6

Flexibility Features

1.6.7

Drive Roaming

1-14
•
Provides one LED signal for each PHY to indicate link activity (this
is a fault LED only for controllers with internal port connectors)
Note: The SAS 9280-8e RAID controller and the SAS 9280DE-8e
RAID controller do not have any LEDs to indicate link
activity.
•
2
Provides an I C interface for enclosure management
•
Supports the internal SAS Sideband signal SFF-8485 (SGPIO)
interface
These features increase the flexibility of the RAID controllers:
•
Supports a Flash ROM interface, a nonvolatile static RAM
(NVSRAM) interface, and a pipelined synchronous burst SRAM
(PSBRAM) interface
•
Offers a flexible programming interface to tune I/O performance
•
Allows mixed connections to SAS targets or SATA II targets
•
Leverages compatible connectors for SAS connections and SATA II
connections
•
Allows grouping of up to four PHYs in a single quad port to form a
wide port
•
Allows programming of the World Wide Name
Drive roaming occurs when the drives are changed to different ports on
the same controller. When the drives are placed on different channels,
the controller detects the RAID configuration from the configuration data
on the drives.
Configuration data is saved in both the NVRAM on the RAID controller
and on the drives attached to the controller. This action maintains the
integrity of the data on each drive, even if the drives have changed their
physical device ID.
Note: If you move a drive that is being rebuilt, the rebuild
operation will restart, not resume.
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