HP P421/1GB 631673-B21 사용자 설명서

제품 코드

631673-B21

Availability

Provides increased server uptime by providing advanced storage functionality:

Online RAID Level Migration (between any RAID level/with FBWC)
Online Capacity Expansion (with FBWC)
Online Advanced Capacity Expansion (with Smart Array Advanced Pack 2.0 upgrade)
Logical Drive Capacity Extension (with FBWC)
Global Online Spare
Pre-Failure Warranty

Fault Prevention

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) was first developed by HP which
detects possible hard disk failure before it occurs, allowing replacement of the component before
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.
Environment Tracking for External Storage System: Monitors fan speed and cabinet temperature of
Modular Smart Array Enclosures and HP Disk Enclosures.

Fault Tolerance

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 (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 6+0

RAID 6+0

RAID 6+0: Supported with min of 8 drives, but would have 4 available. Target benefit is to split
RAID across the external boxes

NOTE:

NOTE: RAID 6, 6+0 can be enabled with a minimum of 512 MB FBWC and Smart Array
Advanced Pack 2.0 License key option upgrades.

RAID 5

RAID 5 (Distributed Data Guarding): This allocates one set of parity data across drives and allows
simultaneous write operations. This level of fault tolerance can withstand a single drive failure
without downtime or data loss.

RAID5 is available on the SA P421 with a minimum of 1GB cache

RAID 5+0

RAID 5+0: This is a RAID 0 array striped across 5 elements. Combines the straight block-level
striping of RAID 0 with the distributed parity of RAID 5.
Drive Mirroring

Drive Mirroring

Drive Mirroring (RAID 1, 1+0): 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.

QuickSpecs

HP Smart Array P421 Controller

Standard Features

DA - 14229 North America — Version 3 — March 15, 2012

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