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Which RAID set is best for my environment?

The RAID set that is best for your environment depends on what your need is for the G-SPEED Studio. Listed below are different RAID Sets that the G-SPEED Studio R can provide:

  • RAID 0 (Striping)
  • RAID 0 offers the maximum performance for the drive as it combines all disks and stripes them into one volume, although a single disk failure will result in losing all the data on the RAID set. The best use for RAID 0 would be when you need quick access large amounts of data that can easily be replaced if a drive fails via a backup or other means of backup.

  • RAID 1 (Mirroring)
  • RAID 1 provides a fault-tolerance configuration that copies data from one drive to another simultaneously, creating a mirror of the data. If one drive fails, you will still have access to the data. RAID 1 requires a minimum of 2 disks. It will not perform as fast as a RAID 0 but provides protection of the data if one drive does fail. RAID 1 would cut the total capacity of the RAID set in half.

  • RAID 1E (Stripped Mirroring)
  • RAID 1E would combine the stripping of the disks in RAID 0 and mirroring in RAID 1. This would stripe the data and copies that data across all the drives in the RAID set. Just like RAID 1, you would have half of the total capacity of the RAID set, but the advantage to that is that you can have an odd number of disks in the RAID set.

  • RAID 10 (Stripping and Mirroring)
  • RAID 10 is similar with RAID 1E as it would also combine the stripping of the disks in RAID 0 and the mirroring in RAID 1, but you will need a minimum of 4 drives in the RAID Set. This RAID set would group the drives in pairs of two and within that group, and those pairs will mirror each other within the group. Just like RAID 1 and 1E, RAID 10 will cut the total capacity of the RAID set in half.

  • RAID 5 (Striping with Parity)
  • RAID 5 would stripe data and parity across three or more disks. In this RAID set, if a drive would fail, the data is automatically recreated from the parity and distributed data once the new drive is installed. This RAID set is the most common for business servers and NAS devices. You will have good read performance, but will have a hit performance on write speeds since the parity data needs to be recalculated with new data written on the drive. You lose about the size of one of the drives in the RAID set in RAID 5.

  • RAID 6 (Striping with Dual Parity)
  • RAID 6 is similar to RAID 5 in that it would stripe data across the drives in the array, but will have a dual parity to store and recover data. RAID 6 would include a second parity distributed across the drives, thus allowing you to have two drive failures. You need at least 4 drives to configure your drives into a RAID 6, and a maximum of 16 drives. You lost about the size of two of the drives in the RAID set in RAID 6.

  • RAID 50 (Striping a RAID 5)
  • RAID 50 would combine two RAID 5 raid arrays and stripe them in a RAID 0. It requires at least 6 drives. Up to one drive in the RAID 5 arrays that are stripped can fail without data loss. Capacity for the RAID 50 will be the total capacity of all drives in the array, minus two drives.

  • RAID 60 (Striping a RAID 6)
  • RAID 60 would combine two RAID 6 raid arrays and stripe them in a RAID 0. It requires at least 8 drives. Up to two drives in the RAID 6 arrays that are stripped can fail without data loss. Capacity for the RAID 50 will be the total capacity of all drives in the array, minus four drives.

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Article ID: 193 Article Created: 05-27-2014 14:01 PMLast Modified: 11-14-2014 11:59 AM

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