If you intend to set up RAID, perhaps you have known that there are multiple RAID levels, like RAID 0, 1, 5 and 10, etc. Hence, the first step to use RAID is to choose a suitable RAID level. This article will guide you to consider 5 vital things in selection.
So-called RAID refers to redundant array of independent disks. It is an advanced data storage technology that can combine several physical drives into one logical unit. It’s blazing convenient for the users that require a great amount of storage space. Hence, more and more users would like to invest in RAID.
However, due to the fact that there are too many available RAID levels, many are perplexed about which one is exactly appropriate to them. As a matter of fact, as long as you figure out the following 5 things, you can make a right decision. Now, read on the get them in detail.
It is believed that majority of users using RAID is for more and flexible storage capacity. Hence, storage is undoubtedly the first of most crucial things to think of. Different RAID levels will bring up different amounts of usable space remaining. For instance, RAID 0 has no parity information and no mirroring. Thus, it can give you full use of all drives, namely 100% usable storage of the drives. Yet, in RAID 1 or 10, you can only get 50% capacity since it contains a mirrored copy of data. To get more such information about the other RAID levels, you can search Internet.
In addition, maybe you longing for RAID are for better performance, namely the faster speed. When you choose a RAID level, you should put the performance as the priority in consideration. For example, if you do not care about data loss and only desire speed, RAID 0 is the best choice. Nevertheless, if not only do you hope performance but also data redundancy, you can consider to opt for RAID 10.
3. Data Protection
As mentioned in the above point, data redundancy is a critical factor in RAID. It refers to the level of data protection. More specifically, are you concerned about data loss in your machines. If the data is vitally important for you, you don’t want to experience data loss like PST corruption and you cannot persist in regular and consistent data backups, you’d better pay special attention to the ability of data protection of RAID. Put simply, it’s better to choose RAID 10 or 60. In them, if one disk fails, the system won’t fail at once and you needn’t kiss your data goodbye.
Furthermore, you have to take the rebuild factor into account. When a disk in the RAID system fails or the entire server malfunction, you need to perform rebuilds. Therefore, when selecting RAID level, you need to ensure the maximum number of rebuild times at any one point for the RAID controller. Also, in the rebuild, it is necessary to replace the space disks back to the original location after replacing the failed disk? In a nutshell, you need to think of the level of difficulty in RAID rebuilds.
Last but not least, budget, namely cost is also a matter of necessity in choosing a RAID level. Unquestionably, you need to select an affordable one. In general, RAID 0 is the most cost effective from the perspective of capacity and performance. In comparison, RAID 1/10 is more expensive. All in all, when choosing RAID level, it is extremely significant to think of the cost-effectiveness.
Shirley Zhang is a data recovery expert in DataNumen, Inc., which is the world leader in data recovery technologies, including recover Sql Server and outlook repair software products. For more information visit www.datanumen.com