by Jamal A
Over the past decade, the world has changed a lot, but so does the technology. We have seen technology leap beyond our wildest dreams. However, database is the main part of the technology. The article I read basically talks about the potential storage devices and technologies that can be used for database storage. Data is the greatest asset for all businesses whether it is big or small. Most companies are taking data storage very seriously. It is really important to back up data frequently specially for sales companies. According to the article, “in a simple sales transaction, a primary use of data could be inventory control, where a report shows how much of a product has been sold and how much remains in storage”. Majority of companies use hard disk to store important data. “Hard disks are random-access storage mechanisms that relegate data to spinning platters coated with extremely sensitive magnetic media”. Advancement in technology has made hard disks the cheapest storage device for large volumes of data. However, Hard disks are electromechanical devices and their working life is limited. It does not matter if the hard disk is new or old, it can easily get damaged and cause issues when rendering the data from the drive. In order to solve that issue, disks are frequently organized into groups of disks usually called Redundant Arrays of Inexpensive Disks (RAID). According to the article, the goal of RAID is to confirm data availability. There are different ways to configure RAID but the most common are; “RAID-0- In which “disk striping is used to improve storage performance, but there is no redundancy”. “In RAID-1 — disk mirroring offers disk-to-disk redundancy, but capacity is reduced and performance is only marginally enhanced”. In RAID-5 — parity information is spread throughout the disk group, improving read performance and allowing data for a failed drive to be reconstructed once the failed drive is replaced. In RAID-6 — multiple parity schemes are spread throughout the disk group, allowing data for up to two simultaneously failed drives to be reconstructed once the failed drive are replaced”. There are total seven layers of storage, the very first layer known as zero (0) layer and it goes up to six (6) layers, which is the last layer of storage. Majority of the companies uses the first lays because it is easier to sat up and also very reliable.
This article relates to class because it talks about different ways to manage data. It is so important to backup data frequently. I remember i purchased a terabyte hard drive not too long ago. Soon After, I transferred all my data to the portable hard drive it crashed, and now it is not even recognized by any computer, or anything for that matter. The lesson I learned from this experience is that never having one backup file, at least have two backup file just to be on the safe side. I personally like this article because it describes different ways to recover data.
Storage Devices « Chris Collins. (2007, October 20). Chris Collins. Retrieved February 13, 2012, from http://ccollins.wordpress.com/2007/10/20/storage-devices/#more-31