SATA revision 3.1 released in 2011 introduced the following features: mSATA, SATA for solid-state drives in mobile computing devices, a PCI Express Mini Card-like connector that is electrically SATA, zero-power optical disk drive,queued TRIM Command (improves solid-state drive performance), hardware control ceatures, universal storage module (USM). It is backward compatible with SATA 3 Gbit/s. The SATA 3.0 specification contains the following changes: continued compatibility with SAS, isochronous Native Command Queuing (NCQ) streaming, improved power management capabilities, a small low insertion force (LIF) connector, alignment with the INCITS ATA8-ACS standard. The theoretical burst throughput of SATA 6.0 Gbit/s is double that of SATA revision 2.0. SATA/600 run with a native transfer rate of 6.0 Gbit/s taking 8b/10b encoding into account, the maximum uncoded transfer rate is ~4.8 Gbit/s (~600 MB/s). SATA II uses same encoding as SATA I featuring an actual data transfer rate of 2.4 Gb/s, or ~300 MB/s. In practice, some older SATA systems require the peripheral device's speed be manually limited to 150MB/s with the use of a jumper.
SATA II devices are required to support the original 1.5Gb/s rate. A 3Gb/s signalling rate was added to the PHY layer. It was released in 2004, introducing Native Command Queuing (NCQ). SATA/300 - is the second generation of SATA interfaces.
#HARD DRIVE PAGE LAYERS DIAGRAM SERIAL#
The simplicity of a serial link and the use of LVDS allow to use of longer drive cables. Actual data transfer rate is up to 1.2 Gigabits per second (Gb/s), or ~150 megabytes per second (see the notes below for the actual transfer rate). SATA/150 - first-generation of Serial ATA interfaces, run at 1.5 Gigahertz (GHz). SATA interface revisions: SATA-I (1.5 Gbit/s, 150 MB/s, Serial ATA-150) The SATA connector is keyed at pin 7. Pin 1 may be used on Hot Plug arrays for signalling.
Transmit pins are connected to Receive pins on the other side. The PATA power connector used instead of the SATA power in some early devices. A Serial ATA Hard drive may also have a third connector for legacy PATA power connections. The power for the devices is transmitted via Serial ATA (SATA) power connector. There major revisions of SATA interface are: SATA 1.0 (Serial ATA-150), SATA revision 2.0 (Serial ATA-300), SATA revision 3.0 (Serial ATA-600), SATA revision 3.2, SATA revision 3.3. Due to serial transfer and lower power the maximum allowable length of SATA cables exceeds that of ATA ribbon cables. Serial ATA also reduces the signalling voltage from the 5 volts used in P-ATA down to 0.5 volts, which reduces power consumption and electrical interference. This adds a capability that more expensive systems such as SCSI and Fibre Channel have had for a long time, though the future will tell how widely users exploit that aspect of the technology. In addition, Serial ATA should give users the ability to hot swap hard drives. The SATA standard defines a cable with seven conductors (three grounds and four active data lines in two pairs) for the data connection.
#HARD DRIVE PAGE LAYERS DIAGRAM SOFTWARE#
It is the successor of the legacy Advanced Technology Attachment standard (PATA, IDE, Parallel ATA). Parallel ATA uses a 16-bit wide data bus with many additional support and control signals, all operating at a much lower frequency. SATA host adapters and devices communicate via a high-speed serial cable over two pairs of conductors. To ensure backward compatibility with legacy ATA software and applications, SATA uses the same basic ATA and ATAPI command sets as legacy ATA devices. Serial ATA (SATA) is the next-generation interface for internal storage interconnect, designed to replace parallel ATA technology. It is a computer bus technology designed for transfer of data to and from a storage equipment.
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