![]() ![]() ![]() Note: Creating a new RAID array will erase all filesystems and data on all the disks used. However, the read speed improvements of a typical RAID 1 array are not seen here, as the SATA controller will typically only read from the primary drive. This allows you to decide if you would like the mirroring to occur continuously or only on request in addition, the time it takes to rebuild the array after a disk failure is decreased. Data is written to the primary drive, then copied to the secondary drive as a backup. Recovery: Intel Rapid Recovery Technology creates a special RAID 1 array where instead of two equivalent disks, one disk is designated the “primary” and the other the “secondary”. This RAID level is also sometimes referred to as RAID 1+0. This methodology requires at least four disks. Data is striped between the two RAID 1 volumes, which are able to withstand and rebuild after a failed disk. This allows you to achieve the performance gains of a RAID 0 array while still maintaining the fault tolerance of a RAID 1 array. RAID 10 (Striped and Mirrored): A RAID 10 array combines two RAID 1 arrays in a RAID 0 array. This methodology requires at least three disks. Thus, you can achieve some of the performance gains of a RAID 0 array while being able to withstand a single disk failure. RAID 5 (Striped with Parity): A RAID 5 array functions similarly to a RAID 0 array in that it stripes data across multiple disks however, for each set of blocks, it also writes a block of parity data that can be used to recover a block on another disk if it loses that data. This RAID configuration has no noticeable effect on write speeds but typically improves read speeds, as the system can read from multiple disks simultaneously. A drive can then be reconnected or replaced, at which time the SATA controller will rebuild the volume (note that the rebuild process can take several hours or even days for larger volumes). If an OS is installed on the volume, it will not be interrupted by a failing drive. The primary benefit of this methodology is that if a drive in the array is disconnected or fails altogether, the volume will continue to function as normal. RAID 1 (Mirrored): In a RAID 1 array, the SATA controller mirrors all data between two or more disks. This methodology can provide noticeable improvements to read and write speeds however, if one disk in a RAID 0 array fails, the data on the entire volume will be lost. When writing data to the volume, the SATA controller will rotate block-by-block between the disks. Each disk’s storage space is divided into blocks, the size of which can be set by the user. RAID 0 (Striped): In a RAID 0 array, data written to the volume is split between two or more disks. Different RAID levels have different applications, so be sure to pick the correct one for your use case. Each level has unique characteristics that provide benefits in one form or another. ![]() RAID Levelsĭifferent types of RAID arrays are referred to as “levels”. Helix supports RAID 0, 1, 5, 10, and Recovery arrays. On the Helix platform, the M.2 B-Key, M.2 M-Key, and both cabled SATA connections can be configured in RAID arrays. Karbon 700 supports RAID 0, 1, and Recovery arrays. On the Karbon 700 platform, the two cabled SATA connections can be configured in RAID arrays. If these two disks are stitched together in an array, the M.2 SSD’s timing parameters will be slowed to match the 2.5” SSD. For example, an M.2 SATA III SSD may have slightly faster read and write speeds than a similar 2.5” SATA III SSD. However, the timing parameters of all disks in a certain array, such as write speed, will be slowed down by the chipset to the lowest value among those disks. Note: Intel RST on the Helix platform is only supported in Windows Linux users will need to use a dedicated hardware RAID solution or a software-level RAID utility such as mdadm.īecause the RAID volumes are maintained at the firmware level, the disks in an array do not need to match perfectly. The Intel chipsets on OnLogic’s Helix and Karbon 700 platforms feature Intel Rapid Storage Technology (RST), an integrated firmware-level RAID utility for SATA disks. RAID (Redundant Array of Independent Disks) is a technology used to stitch multiple storage drives together into a single volume for a variety of purposes. ![]()
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