RAID (Redundant Arrive at a Data) offers performance and reliability benefits when multiple disk drives are combined into a logical unit. In a RAID, if one disk fails, the other disks read its data and continue working. However, if there’s a third disk failure, the system won’t work anymore. This article provides details on RAID and its various options.

The hard drive recovery from RAID is possible but it requires expertise and specialized tools.   If you have lost important files from Windows, Mac or a free space drive, this article guides you on how to recover them.

RAID types

RAID 0 is also called striping, which stripes data across multiple disks, but doesn’t provide any redundancy. If one disk fails, all of the data on the RAID will be lost. RAID 1 is a mirroring of two drives with the same contents. If one disk fails, the other can function as a backup and still maintain access to all the data.

RAID 5 is also called block-level striping or distributed parity and distributes parity information among all five disks in a logical unit. It provides redundancy if three or more disks fail at once, although it requires significantly more hardware than single-disk RAIDs. RAID 10 is also called stripe width. In this type of RAID, every member has only one slice of data that are read from and written to their respective disks instead of each member having its own slices like in single-disk RAIDs. As you may have guessed by now, this offers improved performance but less redundancy than single-disk RAIDs.

RAID levels

RAID levels are set by the number of disks in the RAID unit.   The minimum for a RAID is two disks, but the most practical and most commonly used level is 3 disks. You can also buy 4 or 5-disk units, but these might not be cost-effective.

RAID types for data recovery

RAID is available in multiple types depending on how many disks are in the RAID and where the data is stored. RAID-0 uses a single disk to store all the data, disregarding redundancy.

It’s not recommended for use with large amounts of data because it doesn’t provide any redundancy. RAID-1 uses two disks to store all the data and provides redundancy. This type of RAID requires at least two drives to be used. RAID-5 is similar to RAID-1 but five disks are used for storing all the data with additional redundancy. RAID-6 uses six drives and provides even more redundancy than RAID-5, but it requires six drives to be used.

NAS drive

NAS is short for network-attached storage, which refers to a computer that is connected to the network. NAS drives are typically used in business environments where it’s important to share data with many users easily.

NAS drives have multiple disks that can all be individually assessed at the same time, and they offer greater performance than traditional hard drives. If you have lost important files from Windows, Mac or a free space drive, this article guides you on how to recover them.

Hard Disk Drive (HDD)

Hard Disk Drive (HDD) is a device that houses and stores data. It is available in different types of storage capacity, HDDs are typically made up of platters with magnetic surfaces. The HDD has multiple sectors which store the data.

A solid-state drive (SSD)

A Solid-state drive (SSD) is a type of computer data storage device that uses integrated circuit flash memory to store persistent data and random access memory to rapidly read or write that data.

An SSD can have a large number of input/output operations per second (IOPS), but this performance comes at the cost of high latency, relatively low random I/O performance, and lower power efficiency than traditional spinning disks. Although SSDs are currently more expensive per gigabyte than traditional hard drives, the price gap between the two is shrinking due to increased production yields and technological advancements.

For example, in 2018, the average selling price for an SSD was around $0.90 per gigabyte on the secondary market, compared with $2.00 for a 7200rpm 3.5″ hard drive.

Software RAID

Software RAID is a software-based RAID system. It’s the most common type of RAID and the most cost-effective. Software RAID can be implemented in Windows, Mac OS X, FreeBSD, and Linux operating systems. With this type of RAID, arrays are created and managed using software that works on the operating system’s kernel level.

The software creates virtual disks out of physical drives, so they’re as fast as if they were a single drive.  Like other RAIDs, data striping (the process of sending data to multiple disks simultaneously) is used with this type of storage.  Software RAID is commonly found in small business servers or home networks where reliability is important, but performance isn’t crucial.


Now, you can easily recover deleted files from your RAID. Follow the simple steps in RAID Data Recovery: A Complete Guide To Recover Deleted Files from Windows, Mac, Free Space and More to recover deleted files from your RAID.