Lenovo ServeRAID M5120 SAS/SATA Controller for Lenovo System x - Serial ATA/600 - PCI Express 3.0 x8 - Plug-in Card - RAID Supported - 0, 1, 5, 10, 50, 6, 60 RAID Level - 2 x SFF-8088 - 2 Total SAS Port(s) - 2 SAS Port(s) External

Patrol read for media scanning and repairing. Patrol read is a background sentry service designed to proactively discover and correct media defects (bad sectors) that arise normally as a disk drive ages. The service issues a series of verify commands, and if a bad block is discovered, the cards firmware uses RAID algorithms to recreate the missing data and remap the sector to a good sector. The task is interruptible based on controller activity and host operations. The firmware also provides an interface where the patrol read task can be initiated, set up for continuous operation, and terminated from a management application. Patrol read can be activated by manual command or automatically. Extensive online configuration options and advanced monitoring and event notification Management tools provide convenience for configuration of logical volumes and alerting when errors have occurred or are about to occur. WebBIOS configuration utility for pre-boot array configuration and management. WebBIOS is a utility built into the ServeRAID controller that allows you to configure drive groups and logical drives before installing or booting the operating system. Online Capacity Expansion. Online Capacity Expansion (OCE) allows the capacity of a virtual disk to be expanded by adding physical disks or making use of unused space on existing disks, without requiring a reboot. Single controller multipathing (failover) I/O load balancing. The ServeRAIDs firmware detects and uses multiple paths from the controllers to the SAS drives that are in enclosures. With redundant paths to the same port of a device, if one path fails, another path can be used to communicate between the controller and the drive. Using multiple paths with load balancing, instead of a single path, can increase reliability through redundancy. Fast initialization for quick array setup. Fast initialization quickly writes zeroes to the first and last sectors of the virtual drive. This allows you to immediately start writing data to the virtual drive while the initialization is running in the background. Auto-resume on array rebuild or array reconstruction after loss of system power. Auto-resume uses non-volatile NVRAM to save rebuild progress during a host reboot or power failure to automatically resume from the last checkpoint. Auto-resume ensures that data integrity is maintained through the process. The card supports a number of features that are able to be implemented without rebooting the server. Applications such as email and web server benefit from avoiding downtime during transition. Consistency check for background data integrity. Consistency check verifies that all stripes in a virtual disk with a redundant RAID level are consistent. The consistency check will mirror data when an inconsistent stripe is detected for a RAID 1 and recreate the parity from the peer disks in the case of a RAID 5 or RAID 6. Consistency checks can be scheduled to take place periodically. Global and dedicated hot spare with revertible hot spare support. A hot spare rebuilds data from all virtual disks within the disk group in which it is configured. ServeRAID provides the ability to define a physical disk as a hot spare to replace a failed drive. Hot spares can be configured as either global or dedicated. A global hot spare allows any physical drive to be designated as a hot spare. A dedicated hot spare allows the user to assign a hot spare drive to a particular array of the same drive type. Online RAID Level Migration. Online RAID Level Migration (also known as logical drive migration) provides the ability to migrate a virtual disk from any RAID level to any other RAID level without requiring a reboot. System availability and application functionality remain unaffected.