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 card's 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.
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.
Single controller multipathing (failover) I/O load balancing
The ServeRAID's 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.
Human Interface Infrastructure (HII) configuration utility for pre-boot array configuration and
HII is a utility that allows you to configure drive groups and logical drives before installing or booting
the operating system.
MegaRAID Storage Manager management software
MegaRAID Storage Manager is an easy-to-use advanced RAID management application that is
used across the entire family of ServeRAID M controllers. It allows you to configure, monitor, and
maintain drive groups, virtual drives, and advanced features with an intuitive GUI, reducing
administrative efforts and simplifying troubleshooting.
Note: RAID 10 and 50 drive groups do not support Online Capacity Expansion and Online RAID Level
Migration. RAID 0, 1, and 5 drive groups do not support Online Capacity Expansion and Online RAID Level
Migration if two or more virtual drives are defined on a single drive group.
The following features are optional and require the purchase of an additional upgrade:
RAID 5, 50 support with Zero Cache/RAID 5 Upgrade (part number 00AE930)
MegaRAID SafeStore support for self-encrypting drive (SED) services
MegaRAID SafeStore encryption services offer instant secure erase and local key management for
self-encrypting drives. Instant secure erase permanently removes data when repurposing or
decommissioning SEDs. SafeStore local key management provides the necessary management
and protection of SEDs using a simple pass phrase, security key identifier, and security key file that
can be set and applied to all SEDs assigned to a ServeRAID adapter. This feature removes the
complexity of managing each SED's unique encryption key, and essentially, it relieves the
administrator of most of the daily tasks of securing data. The SafeStore feature is a part of a RAID 5
upgrade (part number 00AE930).
ServeRAID M1215 SAS/SATA Controller