Lenovo ServeRAID M5015 Product Manual page 4

Features
The ServeRAID M5015 and ServeRAID M5014 adapter cards have the following features:
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 will ensure 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.
Online Capacity Expansion
Online Capacity Expansion (OCE) allows the capacity of a virtual disk to be expanded by adding
new physical disks or making use of unused space on existing disks, without requiring a reboot.
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.
Fast initialization for quick array setup
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 recreating the parity from the peer disks when in the case of a RAID 5 or RAID 6. Consistency
checks can be scheduled to take place periodically.
Extensive online configuration options: advanced monitoring and event notification
Management tools provide convenience for configuration of logical volumes plus alerting when
errors have occurred or are about to occur.
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 card's firmware will use 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 may 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 will allow the user to assign a hot spare drive
to a particular array of the same drive type.
The ServeRAID M5000 Series Advanced Feature Key enables the following features:
RAID levels 6 and 60
LSI SafeStore: support for self-encrypting drive services:
Instant secure erase
Local key management
LSI SafeStore encryption services offer instant secure erase and local key management for self-encrypting
drives. This technology represents a significant step forward in securing data on a disk drive from any
unauthorized access or modification resulting from theft, loss, or repurposing of drives:
Instant secure erase permanently removes data when repurposing or decommissioning SEDs.
ServeRAID M5015 and M5014 SAS/SATA Controllers 4