Application Specific Guidelines; E-Mail Servers - Dell PowerVault MD1000 SAS Solution Manual

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Table Of Contents

Table of Contents

A REFERENCE GUIDE FOR OPTIMIZING DELL™ MD1000 SAS SOLUTIONS

RAID 10

RAID 10 has good I/O performance, excellent availability and redundancy. The biggest drawback

of RAID 10 is that it requires twice the number of physical disks needed for data. This RAID

configuration should be used in situations requiring maximum availability, redundancy, and

performance.

RAID 5

RAID 5 has good I/O performance, data protection and requires only one additional physical disk

than the number needed for data. RAID 5 should be used in situations where maximum storage

capacity is required along with a moderate amount of data protection.

RAID 50

A balance between RAID 5 and RAID 10, this solution offers good I/O performance, availability and

good storage capacity. This configuration offers slightly higher performance than RAID 5, but

requires multiple additional physical disks than the number needed for data. It does however

provide greater storage capacity than a RAID 10 solution with a decrease in performance and data

protection. This should be used in situations where greater redundancy and data protection is

required as well as a reasonable storage capacity.

Concatenated

This solution is not recommended due to lack of data protection and redundancy and no

performance gain.

Note: For more details on RAID configurations see the Dell 'Getting Started with RAID' document

(http://support.dell.com/support/edocs/storage/RAID/RAIDbk0.pdf)