![]() However, all data will be lost if a single disk fails. ![]() Two advantages to this level of RAID are the availability of 100% of the disks' total storage capacity and easy expansion. Once Disk 1 is full, data will be written to Disk 2, then Disk 3, etc. For example, data is written to Disk 1 first. SimplyRAID will calculate the overhead and prepare it for future disk expansion.ĭisks in a JBOD configuration store data sequentially. However, one 1TB disk paired with one 2TB disk can only create 1TB of protection since data cannot surpass the storage capacity of the smallest disk. For example, two 1TB disks will create a RAID 1 array without any disk capacity overhead. This means that, unlike standard RAID models, you can easily expand the array without losing data. Rather then lose storage capacity overhead in mixed disk environments, SimplyRAID preserves the extra space for use when new disks are added to the enclosure. Most RAID modes use equal disk capacities among the pool of hard drives to protect data. However, SimplyRAID will optimize storage capacity far better than RAID 6 in mixed capacity configurations, giving users more space to store files.Ĭhoose the level of RAID to learn how it works with your NAS. Both RAID 6 and SimplyRAID double security offer data protection even if two disks fail. When making comparisons in a volume with four disks, RAID 0 is the best choice for storage capacity but it has a major weakness, no data protection and its performance approximates that of RAID 5. When using the New network volume wizard, you can choose a RAID's radio button to review its strengths and weaknesses in the center of the window. For example, a volume with four disks supports all levels of RAID except for RAID 1, which is not compatible with volumes greater than three disks. The level of RAID available to a volume is contingent upon the amount of disks. Note: Step-by-step instructions on how to use the New network volume wizard are available in New network volume wizard. The tooltip can be accessed by clicking on the i next to Select your choice. The star ratings are available via a tooltip on the RAID selection step. To help administrators configure RAID volumes, the NAS OS New network volume wizard provides a star rating system with an intuitive storage capacity bar. Understanding RAID and its many levels is critical when deciding how best to apportion the disks in your NAS. Important info on NAS backup: It is recommended that all users back up data to DAS or another NAS as further protection against disk failure or secondary points of failure (e.g. However, there is NO DATA PROTECTION when the volume has only one hard drive. Additionally, expanding RAID 1 and SimplyRAID will provide protection against the loss of a single hard drive. ![]() When other disks in the enclosure are available, expand the single-disk volumes and data will remain intact on the volume during expansion (see Volume Expansion: Single-Disk and Unprotected Volumes). Note on enclosures with one hard drive: You can create a SimplyRAID or a RAID 1 volume with a single drive in the enclosure. Single-disk protection means the data is protected in case one hard drive fails or is missing.ĭouble-disk protection means the data is protected in case two hard drive fail or are missing. 8 disks: SimplyRAID double security with double-disk protection.4 disks: SimplyRAID single security with single-disk protection. ![]() 2 disks: SimplyRAID single security with single-disk protection.0 disks: SimplyRAID single security with single-disk protection will be configured during the NAS OS installation.The factory default RAID for a NAS OS device varies upon the amount of disks in the enclosure: The NAS OS New network volume wizard includes a helpful tooltip with star ratings for performance and protection based upon the amount of disks in the volume.ġ (no data protection) or 2 (with data protection) Note that the levels of performance and protection will differ based upon the number of drives in the volume. Refer to the table below for an overview of the RAID modes available to your NAS OS device. ![]()
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