User manual Dell MD3000

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Storage  
ExploringꢀtheꢀDellꢀ  
PowerVaultꢀMD3000  
StorageꢀSystem  
By Manjusha GopakuMar  
Vishal kadaM  
The Dell PowerVaultMD3000 external RAID enclosure allows  
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.  
paul Winston  
he Dell PowerVault MD3000 storage array is designed  
to provide flexible, high-performance, highly scal-  
able RAID storage without compromising data integ-  
checks, and Self-Monitoring, Analysis, and Reporting  
Technology (SMART)  
T
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.  
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.  
The PowerVault MD3000 external RAID array can sup-  
port up to forty-five 3.0 Gbps Serial Attached SCSI (SAS)  
disks and includes redundant power supplies and fans.  
Connectivity between host servers and the storage is pro-  
vided by two Dell SAS 5/E host bus adapters (HBAs).  
The PowerVault MD3000 is designed primarily for high-  
performance two-node clusters; however, its dual-port  
RAID controllers can also provide shared nonredundant  
storage for up to four servers. Other key features include  
the following:  
Related Categories:  
Backup, recovery, and  
archiving (BURA)  
Dell PowerVault storage  
Direct attach storage (DAS)  
Serial Attached SCSI (SAS)  
Storage  
Redundantcluster 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® Multipath I/O  
(MPIO) on Microsoft Windows® operating systems and  
Multipath Proxy (MPP) on Linux® operating systems—fails over  
virtual disk ownership to the secondary RAID controller for I/O  
processing, helping ensure host data access.  
Visit www.dell.com/powersolutions  
for the complete category index.  
Mirrored data cache of up to 512 MB on each RAID  
controller  
In-band and out-of-band management using Dell Modular  
Disk Storage Manager  
Redundant, hot-swappable components and virtual disk  
failover  
The PowerVault MD3000 supports two redundant cluster  
configurations:  
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  
•ꢀ Singleꢀport:Administrators can use this mode with a  
single storage path and single-port RAID controllers (see  
DELL POWERSOLUTIONS | Mꢇꢈ ꢌꢍꢍꢎ  
reꢀꢁꢂꢃꢄeꢅ fꢁꢆm Dell Power Solutions, Mꢇꢈ 2007. Cꢆꢀꢈꢁꢂgꢉꢄ © 2007 deꢊꢊ iꢃc. aꢊꢊ ꢁꢂgꢉꢄꢋ ꢁeꢋeꢁveꢅ. rev. 2.  
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