By Manjusha GopakuMar
rity. Its integration of two high-performance RAID controllers,
Dell Modular Disk Storage Manager software, and automatic
event monitoring helps reduce total cost of ownership and
maximize data protection.
port up to forty-five 3.0 Gbps Serial Attached SCSI (SAS)
disks and includes redundant power supplies and fans.
Backup, recovery, and
Connectivity between host servers and the storage is pro-
vided by two Dell SAS 5/E host bus adapters (HBAs).
Dell PowerVault storage
The PowerVault MD3000 is designed primarily for high-
performance two-node clusters; however, its dual-port
Direct attach storage (DAS)
RAID controllers can also provide shared nonredundant
Serial Attached SCSI (SAS)
storage for up to four servers. Other key features include
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multiple servers to access a shared pool of expandable storage,
helping enterprises avoid the costs and complexities of internal
storage. This article outlines the hardware, configuration, and
management features of this storage system.
he Dell PowerVault MD3000 storage array is designed
to provide flexible, high-performance, highly scal-
able RAID storage without compromising data integ-
The PowerVault MD3000 external RAID array can sup-
Mirrored data cache of up to 512 MB on each RAID
In-band and out-of-band management using Dell Modular
Disk Storage Manager
Redundant, hot-swappable components and virtual disk
Transparent failover for clustered operating systems to
help maximize data protection
Virtual disk snapshot and virtual disk copy creation
RAID level migration, capacity expansion, consistency
MD3000 external RAID enclosure allows
checks, and Self-Monitoring, Analysis, and Reporting
Figure 1 compares PowerVault MD3000 features with
those of the PowerVault MD1000.
Configuration options for the Dell PowerVault MD3000
Administrators can configure the PowerVault MD3000 as
part of a nonredundant configuration or a redundant clus-
ter configuration. Nonredundant configurations are recom-
mended only for noncritical data storage; this type of
configuration provides only a single data path, meaning a
failed or removed cable, HBA, or RAID controller could
cause the storage path to fail.
Redundant cluster configurations, in contrast, provide high
availability for critical data and depend primarily on physical
connectivity and the host multipath software. If a component
fails or an error occurs on the data path to the primary RAID
controller, the multipath driver—Microsoft
(MPIO) on Microsoft Windows
Multipath Proxy (MPP) on Linux
virtual disk ownership to the secondary RAID controller for I/O
processing, helping ensure host data access.
The PowerVault MD3000 supports two redundant cluster
Single port: Administrators can use this mode with a
single storage path and single-port RAID controllers (see
reprinted from Dell Power Solutions, May 2007. Copyright © 2007 dell inc. all rights reserved. rev. 2.
operating systems and
operating systems—fails over