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Redundant Server Hard Drives Best Practices
- by Anthony C.
A good number of businesses and organizations today depend on reliable server based services such as email, ecommerce, client relationship management and more. Ensuring maximum up time and availability of these critical services and applications, for the most part, is dependent upon the hardware. It is best to invest in redundant hardware and quality server components. Although it is possible to build your own custom server from third party components, hardware from well established vendors like Hewlett Packard, Dell, IBM or similar offer the best overall quality and support coverage.
Hard drives utilizing Redundant Array of Independent Disks (RAID) technologies are key components of a reliable server installation. Two or more hard drives are required for a typical RAID configuration. Hard drives configured in a RAID array help to protect critical data. Serial Attached SCSI (SAS) and Serial ATA (SATA) are the two most widely used drive types in servers today. SAS type drives should be first choice to ensure maximum performance and reliability. They are considered more durable and reliable under busy 24x7 server workload conditions. SAS drives have a spindle speed of up to fifteen thousand revolutions per minute and are available in either the 3.5 inch or 2.5 inch form factor. Although SATA type drives are generally considered value drives, the quality has risen in years to accommodate server environments. They offer greater capacity with current spindle speeds as high as ten thousand revolutions per minute.
A large single drive configuration is not recommended for a server solution that provides mission critical functions and services. Mirroring, or the replication of data between two identical drives, would be the recommended minimum RAID configuration for most servers. Installing a third hard drive as a hot spare helps to automate the recovery and data rebuild process when an existing drive in a RAID array fails. A RAID 5 array consists of three or more drives while a RAID 6 array requires a minimum of four drives. A RAID 5 configuration can only compensate for a single drive failure. In a Raid 6 array, two drives can fail without the loss of data. Raid 5 or Raid 6 with a hot spare would be ideal for SAS drives. Raid 6 should be the minimum configuration for use with SATA drives.
With active monitoring and proper maintenance, a redundant drive array utilizing quality components can offer years of reliable service.
About the Author
Anthony C. enjoys writing articles on a variety of topics. Visit his latest website http://hairclippersprofessional.com for information on hair clippers professional grade models and accessories.
