HP Smart Array P400 Quickspecs page 5

QuickSpecs
Standard Features
Fault Prevention Fault Prevention
Fault Prevention Fault Prevention
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
The following features offer detection of possible failures before they occur, allowing preventive action to
be taken:
S.M.A.R.T.: Self Monitoring Analysis and Reporting Technology first developed at HP detects
possible hard disk failure before it occurs, allowing replacement of the hard drive before a real
failure occurs.
Drive Parameter Tracking monitors drive operational parameters, predicting failure and notifying
the administrator.
Dynamic Sector Repairing continually performs background surface scans on the hard disk drives
during inactive periods and automatically remaps bad sectors, ensuring data integrity.
Smart Array Cache Tracking monitors integrity of controller cache, allowing pre-failure
preventative maintenance.
Keeps data available and server running while a failed drive is being replaced; several fault tolerance
configurations are supported including:
RAID 6 with ADG RAID 6 with ADG RAID 6 with ADG RAID 6 with ADG (Advanced Data Guarding): This is the highest level of fault tolerance. It
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 RAID 5 (Distributed Data Guarding): This allocates one set of parity data across drives and allows 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 RAID 1, 1+0 RAID 1, 1+0 (Drive Mirroring): This allocates half of the drive array to data and the other half to
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 North America — Version 6 — November 17, 2006
HP Smart Array P400 Controller HP Smart Array P400 Controller HP Smart Array P400 Controller HP Smart Array P400 Controller
Page 5