How Big Should RAID 5 Array Be
Here you will find out:
- how to use RAID 5 with 4 drives
- what RAID is better if you have 4 drives
- when DiskInternals can help you
Are you ready? Let's read!
RAID 5 array peculiarities
The minimum number of drives for RAID 5 is two, but it is best if there are four disks. The parity block is evenly distributed across all disks in the array, so the load on the array is balanced as much as possible. Checksums are used to recover data when one of the drives is damaged. Writing data to an array can differ depending on the ratio of the row size and the amount of data.
When the records are equal or exceed the size of the line, reading old blocks is not required; therefore, the write speed is higher.
When the record size is less than the line size, reading old blocks is necessary, and the speed will naturally be lower.
RAID 5 with 4 drives
The main advantage of this array type is the amount of free space. That is, if you have four disks, then you can safely record information on three of them. Only one of the four disks contains information for restoring the array when it is damaged. It should be understood that if two disks are dead in RAID 5, it will be impossible to recover anything. From a security point of view, this array is not very reliable. In any case, you will need to make additional copies of very important data. In addition, hard drives can fail you at any time.
On the other hand, RAID 5 is a very economical option; it is small-sized and high-performance.
Taking into account these aspects, decide whether this RAID option suits you or not.
If you have 4 drives
If you have four disks and you want to make an array, it is better to use RAID 10. If, in a RAID 10 with four disks, two disks die, then it is likely that one mirror will not be damaged. After all, RAID 10 combines mirroring and striping, and this in turn provides two full copies of your data. In addition, performance and data availability will be on top.
If your RAID has failed
It’s already clear that RAID 5 carries a risk of data loss. However, any array is susceptible to collapse to some degree. If this has happened to you, you should not panic. Just for such cases, DiskInternals RAID Recovery application has been developed by leading IT experts.
DiskInternals RAID Recovery supports both automatic and manual determination of fundamental parameters, such as array level, type of RAID controller, disk order, size strips, etc. A reliable and smart Recovery Wizard will help you if you have little knowledge about how to recover an array.
Follow these instructions for a painless, quick, and high-quality array recovery:
Download and then install RAID Recovery on your computer. After that, open the application and run the Recovery Wizard. if the Wizard is not needed, then skip this step.
Attach RAID disks individually.
Select an array for subsequent scanning.
Select a recovery mode:
After scanning, view all or individual search results for free. Check the integrity and correctness of the data.
After that, purchase a license to complete the export of data to the desired data storage device.