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When a SATA controller is configured to operate in IDE Mode, the number of storage devices per controller is usually limited to four (two IDE channels, master device and slave device with up to two devices per channel), compared to the maximum of 32 devices/ports when configured in AHCI mode.
The 40-pin IDE/ATA connection transfers 16 bits of data at a time on the data cable. The data cable was originally 40-conductor, but later higher speed requirements for data transfer to and from the hard drive led to an "ultra DMA" mode, known as UDMA .
Parallel ATA (PATA), originally AT Attachment, also known as Integrated Drive Electronics (IDE), is a standard interface designed for IBM PC-compatible computers.It was first developed by Western Digital and Compaq in 1986 for compatible hard drives and CD or DVD drives.
As IDE drives used those extra pins for setting up Master and Slave drives, on SATA drives, those pins are generally used to select different Power modes for use in USB-SATA bridges or enables additional features like Spread Spectrum Clocking, SATA Speed Limit or Factory Mode for Diagnostics and Recovery, by the use of a jumper. [60] [61]
IDE(PATA), SATA, NVMe eSATA, USB, IEEE 1394: Several RAID controllers [4] Yes No Mail, sound and popup Sister utility to CrystalDiskMark. Has AAM/APM control. Defraggler: Windows: Freeware: GUI IDE(PATA), SATA eSATA, USB No Yes No No Primarily a defragmenter; supports basic S.M.A.R.T. stat display, includes the one-word summary of drive-health ...
[1] [2] Because the ATA TCQ is rarely used, Parallel ATA (and the IDE mode of some chipsets) usually only support one outstanding command per port. For NCQ to be enabled, it must be supported and enabled in the SATA host bus adapter and in the hard drive itself.
Hence, its protocol is usually ATA (a.k.a. PATA), SATA, SCSI, FC or SAS. The front-end interface communicates with a computer's host adapter (HBA, Host Bus Adapter) and uses: one of ATA, SATA, SCSI, FC; these are popular protocols used by disks, so by using one of them a controller may transparently emulate a disk for a computer.
The ATA standard is supported by both parallel (IDE, PATA) and serial (SATA) ATA hardware. A drawback of the original ATA TRIM command is that it was defined as a non-queueable command and therefore could not easily be mixed with a normal workload of queued read and write operations. SATA 3.1 introduced a queued TRIM command to remedy this. [70]