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AHCI gives software developers and hardware designers a standard method for detecting, configuring, and programming SATA/AHCI adapters. AHCI is separate from the SATA 3 Gbit/s standard, although it exposes SATA's advanced capabilities (such as hot swapping and native command queuing) such that host systems can
Historically, most SSDs used buses such as SATA, SAS, or Fibre Channel for interfacing with the rest of a computer system. Since SSDs became available in mass markets, SATA has become the most typical way for connecting SSDs in personal computers; however, SATA was designed primarily for interfacing with mechanical hard disk drives (HDDs), and it became increasingly inadequate for SSDs, which ...
Versions 1 & 2 are for IDE drives without AHCI & RAID modes. v3.5.0: v4.x.x: Latest version in which MATRIX RAID mode is included on the named application Intel Application Accelerator RAID Edition. v5.x.x: Since this version the MATRIX RAID mode is included on the named application Intel Matrix Storage Manager, up to version 8.9. v5.5.0: 2005
AHCI was developed when the purpose of a host bus adapter (HBA) in a system was to connect the CPU/memory subsystem with a much slower storage subsystem based on rotating magnetic media; as a result, AHCI has some inherent inefficiencies when applied to SSD devices, which behave much more like RAM than like spinning media. PCI Express using NVMe
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
For a short time in March 2010, users were led to believe that the Intel Rapid Storage Technology (RST) 9.6 (and later) drivers in Windows 7 supported TRIM on RAID volumes, but Intel later clarified that TRIM was supported for the BIOS settings of AHCI mode and RAID mode, but not if the drive was part of a RAID volume. [56]
Non-volatile memory (NVM) or non-volatile storage is a type of computer memory that can retain stored information even after power is removed. In contrast, volatile memory needs constant power in order to retain data.