JMB585 SATA Host provides five ports and supports Port Multiplier.It supports command-based switching (CBS) and FIS (Frame Information Structure)-based switching (FBS).JMB585 also support TRIM to the SSD and can transmit and receive data by both of AHCI mode and legacy IDE mode to and from the host respectively.
JMB582 SATA Host provides two ports and supports Port Multiplier. JMB582 supports command-based switching (CBS) and FIS (Frame Information Structure)-based switching (FBS). It supports TRIM to the SSD and can transmit and receive data by both of AHCI mode and legacy IDE mode to and from the host respectively. However, high-performance flash-based drives can exceed the SATA 3 Gbits transfer rate; this is addressed with the SATA 6 Gbits interoperability standard. Please improve this article by removing excessive or inappropriate external links, and converting useful links where appropriate into footnote references. February 2014 ) ( Learn how and when to remove this template message ). Serial ATA succeeded the earlier Parallel ATA (PATA) standard to become the predominant interface for storage devices. As with many other industry compatibility standards, the SATA content ownership is transferred to other industry bodies: primarily INCITS T13 4 and an INCITS T10 subcommittee ( SCSI ), a subgroup of T10 responsible for Serial Attached SCSI (SAS). The remainder of this article strives to use the SATA-IO terminology and specifications. AT was IBMs abbreviation for Advanced Technology; thus, many companies and organizations indicate SATA is an abbreviation of Serial Advanced Technology Attachment. However, the ATA specifications simply use the name AT Attachment, to avoid possible trademark issues with IBM. In contrast, parallel ATA (the redesignation for the legacy ATA specifications) uses a 16-bit wide data bus with many additional support and control signals, all operating at a much lower frequency. To ensure backward compatibility with legacy ATA software and applications, SATA uses the same basic ATA and ATAPI command sets as legacy ATA devices. A 2008 standard, CFast to replace CompactFlash is based on SATA. After insertion, the device initializes and then operates normally. Depending upon the operating system, the host may also initialize, resulting in a hot swap. The powered host and device do not need to be in an idle state for safe insertion and removal, although unwritten data may be lost when power is removed. However, this feature requires proper support at the host, device (drive), and operating-system levels. In general, SATA devices fulfill the device-side hot-plugging requirements, and most SATA host adapters support this function. It allows the use of advanced features of SATA such as hotplug and native command queuing (NCQ). If AHCI is not enabled by the motherboard and chipset, SATA controllers typically operate in IDE a emulation mode, which does not allow access to device features not supported by the ATA (also called IDE) standard. Sata Bridge Mac OS XModern versions of Microsoft Windows, Mac OS X, FreeBSD, Linux with version 2.6.19 onward, 13 as well as Solaris and OpenSolaris, include support for AHCI, but earlier operating systems such as Windows XP do not. Sata Bridge Driver May HaveEven in those instances, a proprietary driver may have been created for a specific chipset, such as Intel s. First-generation SATA interfaces, now known as SATA 1.5 Gbits, communicate at a rate of 1.5 Gbits, b and do not support Native Command Queuing (NCQ). Taking 8b10b encoding overhead into account, they have an actual uncoded transfer rate of 1.2 Gbits (150 MBs). The theoretical burst throughput of SATA 1.5 Gbits is similar to that of PATA 133, but newer SATA devices offer enhancements such as NCQ, which improve performance in a multitasking environment. Bridged drives have a SATA connector, may include either or both kinds of power connectors, and, in general, perform identically to their native-SATA equivalents. However, most bridged drives lack support for some SATA-specific features such as NCQ. Native SATA products quickly took over the bridged products with the introduction of the second generation of SATA drives. Note that there is no visible difference, other than the labeling, between SATA 1, SATA 2, and SATA 3 cables and connectors.
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