HP Smart Array P400 Quickspecs page 5

QuickSpecs
Standard Features
Fault Tolerance Fault Tolerance
Fault Tolerance Fault Tolerance
Fault Recovery Fault Recovery Fault Recovery Fault Recovery
Ease of Use Ease of Use Ease of Use Ease of Use
Keeps data available and server running while a failed drive is being replaced; several fault tolerance
configurations are supported including:
RAID 6 with ADG (Advanced Data Guarding): This is the highest level of fault tolerance. It RAID 6 with ADG RAID 6 with ADG RAID 6 with ADG
allocates two sets of parity data across drives and allows simultaneous write operations. This level
of fault tolerance can withstand two simultaneous drive failures without downtime or data loss.
RAID 5 (Distributed Data Guarding): This allocates one set of parity data across drives and allows RAID 5 RAID 5 RAID 5
simultaneous write operations. This level of fault tolerance can withstand a single drive failure
without downtime or data loss.
RAID 1, 1+0 RAID 1, 1+0 (Drive Mirroring): This allocates half of the drive array to data and the other half to RAID 1, 1+0 RAID 1, 1+0
mirrored data, providing two copies of every file. It is a high-performance RAID.
Minimizes downtime, reconstructs data, and facilitates a quick recovery from drive failure
Recovery ROM: This feature protects the user from a firmware image corruption by storing a
redundant copy of the firmware image. If the active firmware image becomes corrupt, the
controller will use the redundant firmware image and continue operating.
On-Line Spares: There is no limit to the number of spare drives that can be installed prior to drive
failure. If a failure occurs, recovery begins with an On-Line Spare and data is reconstructed
automatically.
DRAM ECC detects and corrects data bit errors.
Battery-backed write cache upgrade provides for up to two days of battery power for data cache
retention. The data backup duration could be extended anytime the server's auxiliary power is
available during system power down.
Consistency and Upgradeability make the Smart Array family unique in the industry:
GUI based configuration, management and diagnostic software tools
Common data format between generations of products
Data migration between servers and external StorageWorks Modular Smart Array enclosures
DA - 12400 Worldwide — Version 9 — March 26, 2007
HP Smart Array P400 Controller HP Smart Array P400 Controller HP Smart Array P400 Controller HP Smart Array P400 Controller
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