IBM 90Y4304 Manuale Utente
ServeRAID M5016 SAS/SATA Controller
4
Supports LUN sizes up to 64 TB
Configurable stripe size up to 1 MB
Compliant with Disk Data Format (DDF) configuration on disk (COD)
S.M.A.R.T. support
Features
The ServeRAID M5016 SAS/SATA Controller has 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 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.
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.
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.
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.
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
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.
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.
Extensive online configuration options: 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.
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 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.
(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.
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.