The overall capacity of the linear disk is the sum of the capacity of all disks. Files are sequentially saved on physical disks. Two or more disks can be combined into one larger volume. Or, wait to hear two long beeps after the disk crashes and then insert the new disk in place of the failed disk.
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Note: To install a new disk when the server is running, first be sure the disk volume is in the degraded mode. A maximum of 2 failed disks from 2 different pairs are allowed in RAID 10. RAID 10 is suitable for high volume transaction applications, such as a database, that require high performance and fault tolerance. It is recommended that only hard disk drives of the same brand and capacity are used to create a RAID 10 group. The storage capacity of a RAID 10 group is equal to the size of the disk with the smallest capacity in the array times (the number of hard disks in the array/2). RAID 10 is a stripe across a number of disks to provide fault tolerance and high speed data transfer. RAID 10 is a combination of RAID 1 (mirroring) and RAID 0 (striping), without parity. Or, wait to hear two long beeps after the disk crash and then insert the new disk in place of the failed disk. Note: To install a new disk when the server is running, first ensure the disk volume is in degraded mode. RAID 6 can survive 2 disk failures and the system can still operate properly. It is recommended (though not required) to use identical hard drives to establish the most efficient hard drive capacity. The total capacity of a RAID 6 group is equal to the size of the disk with the smallest capacity in the array times the number of (hard disks – 2). To create a RAID 6 group, a minimum of 4 hard disks are required. RAID 6 is ideal for critical data protection needs. Your disk volume will return to a normal status once the volume rebuilding process is complete. The status of the disk volume will change to rebuilding after installing a new disk.
Users can choose to install a new disk after turning off the server or hot-swap the new disk while the server is running. A failed disk should be immediately replaced. There is no more data protection at this stage, and all the data will be lost if the unit suffers a second disk failure. When a disk fails in RAID 5, the disk volume will operate in the degraded mode. A RAID 5 configuration can survive one disk failure without losing any system functionality. In this configuration, the system will automatically use the spare disk to rebuild the array in the event of a physical disk failure. In addition, if your system contains four disk drives, it is possible to use three drives to implement a RAID 5 data array with the fourth drive kept as a spare disk. It is recommended (though not required) that only hard drives of the same brand and capacity are used to establish the most efficient hard drive capacity. The total capacity of the RAID 5 group is equal to the size of the disk with the smallest capacity in the array times the number of (hard disk – 1). A minimum of 3 hard disks are required to create a RAID 5 group. RAID 5 configurations are ideal for organizations running databases and other transaction-based applications that require storage efficiency and data protection. RAID 1 configuration is suitable for storing sensitive data on a corporate or personal level. The storage capacity is equal to the capacity of the smallest single disk, as the second disk drive is used to back up the first disk drive. It provides protection in the event of a single disk failure. Please note that RAID 0 configuration is not recommended for storing sensitive data.ĭisk Mirroring protects your data by automatically mirroring the contents of one disk to the second disk in the mirrored pair. Disk striping is usually used to maximize disk capacity or to accelerate disk access speed. The disk capacity is the sum of all disks. It offers the fastest disk access performance but no data redundancy protection in the event of disk failure or damage. So, in the event that a disk is corrupted or otherwise damaged, all data on that disk will be lost.Ī striping RAID group combines two or more disks into one large, logical disk. However, this setup does not provide any redundancy protection.
If you find and errors that needs correction, let me know.Ī single, stand-alone RAID group can be set up for your NAS. I hope this helps others who have bought the QNAP NAS. This is a quick guide and FAQs for the QNAP NAS systems.
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