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In Windows 8, Windows 8.1 and Windows Server 2012, the controller driver has changed from msahci to storahci, [10] and the procedures to upgrade to the AHCI controller is similar to that of Windows 7. [11] On Windows 8, 8.1 and Windows Server 2012, changing from IDE mode to AHCI mode without first updating the registry will make the boot drive ...
Since release 11.2.0.0000, TRIM commands can be read by Windows RAID drivers made for 7 series chipsets. There is no RAID mode TRIM support on drivers for older chipsets. [28] Intel states that RST support was added for the X79 chipset in RST version 11.6.0.0000 and after. [29]
When enabled via the AHCI controller, this allows the SATA host bus adapter to enter a low-power state during periods of inactivity, thus saving energy. The drawback to this is increased periodic latency as the drive must be re-activated and brought back on-line before it can be used, and this will often appear as a delay to the end-user.
[4] [5] Linux kernels support AHCI natively since version 2.6.19, and FreeBSD fully supports AHCI since version 8.0. Windows Vista and Windows 7 also natively support AHCI, but their AHCI support (via the msahci service) must be manually enabled via registry editing if controller support was not present during their initial install.
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.
Supports Pentium 4 on an 800 MT/s bus. Uses DDR memory up to 400 MHz, or DDR2 at 533 MHz. Replaces AGP and CSA with PCI Express, and also supports "Matrix RAID", a RAID mode designed to allow the usage of RAID levels 0 and 1 simultaneously with two hard drives. (Normally RAID1+0 would have required four hard drives)
If you want AHCI then prepare the floppy disk that came with the motherboard (or make it with the motherboard CD) OR slipstream it onto Windows installation disk. Then install Windows normally. The only real danger here is if you install Windows in AHCI mode and later change it to IDE and vice versa. That causes BSODs and problems.
It often implements hardware RAID, thus it is sometimes referred to as RAID controller. It also often provides additional disk cache . Disk array controller is often ambiguously shortened to disk controller which can also refer to the circuitry responsible for managing internal disk drive operations.