![]() (Optional) You can toggle the Encrypt this volume checkbox and enter a Vault password to protect your data from unauthorized access.Choose a file system (I suggest going with Btrfs), and hit the Next button.Enter the volume you wish to allocate for the storage pool next to the Modify allocate size option and press Next.You can also skip this process and proceed to the next step. (Optional) Perform a Drive Check to correct any errors in your hard drive.Toggle the checkboxes next to the drives that you wish to add to the Storage Pool and hit the Next button.Choose the RAID type and the Drive type, and press Next.Press the Start button on the Storage Creation Wizard that automatically pops up when you launch Storage Manager.Open Storage Manager from DSM's interface.You'll need to create a storage volume to store the contents of your NAS when you boot it up for the first time. Unfortunately, a RAID 6 array has a slow write speed, and it can take as many as 24 hours to rebuild the array if one of your drives does end up failing. RAID 6 adds two parity blocks to each drive to protect the data in case two of your HDDs die out, making it an extremely useful configuration if you value drive-failure tolerance over all else. The trade-off here is that you’ll need at least three HDDs to set up a RAID 5 array. This type of setup uses extra data (called parity) that's split across all drives to reconstruct the actual data and files in case a hard drive fails. RAID 5 counters the drawbacks of both RAID 0 and RAID 1 by splitting the data across several drives and making backups of the split data. Unfortunately, the total capacity of the drives gets reduced by half, and you also get slower write speeds. RAID 1 does the exact opposite: it improves fault tolerance by storing the same data in two separate drives. This is because if one drive fails, the data stored in the RAID 0 array will become inaccessible. While RAID 0 significantly improves the read and write times, you’re twice as likely to lose your data. RAID 0 “stripes” or splits the data and files into smaller parts and simultaneously stores them in two or more disks.
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