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RAID 01, also called RAID 0+1, is a RAID level using a mirror of stripes, achieving both replication and sharing of data between disks. [3] The usable capacity of a RAID 01 array is the same as in a RAID 1 array made of the same drives, in which one half of the drives is used to mirror the other half.
In some RAID configurations, such as RAID 0, failure of a single member drive of the RAID array causes all stored data to be lost. In other RAID configurations, such as a RAID 5 that contains distributed parity and provides redundancy , if one member drive fails the data can be restored using the other drives in the array.
The NVM Express (NVMe) standard also supports command queuing, in a form optimized for SSDs. [17] NVMe allows multiple queues for a single controller and device, allowing at the same time much higher depths for each queue, which more closely matches how the underlying SSD hardware works.
PCIe 3.0 x4 NVMe 1.0 2.5" with U.2 connector/AIC with PCIe x4 connector Intel CH29AE41AB0 2800/1700 450/40 June 2014 Custom Intel NVMe controller [53] [54] DC P3600 Fultondale 400/800/1200/1600/2000 20 nm MLC PCIe 3.0 x4 NVMe 1.0 2.5" with U.2 connector/AIC with PCIe x4 connector Intel CH29AE41AB0 2600/1700 450/56 June 2014
Windows 8.1 and later Windows operating systems support the TRIM command for NVM Express SSDs. Microsoft has released an update for Windows 7 that adds NVM Express support including TRIM for PCIe SSDs. [45] [46] TRIM is known to be supported for ReFS and NTFS, both of which implement a DisableDeleteNotify switch for disabling it. [47]
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Western Digital develops and delivers its HDDs, SSDs, memory cards, [7] NVMe, [8] NAS, [9] [10] RAID [11] and other memory technology solutions under its Western Digital, SanDisk, SanDisk Professional, WD and WD_BLACK brands. The company holds approximately 13,000 active patents and maintains a global presence with 12+ manufacturing facilities ...
Diagram of a RAID 1 setup. RAID 1 consists of an exact copy (or mirror) of a set of data on two or more disks; a classic RAID 1 mirrored pair contains two disks.This configuration offers no parity, striping, or spanning of disk space across multiple disks, since the data is mirrored on all disks belonging to the array, and the array can only be as big as the smallest member disk.