Synonyms for sgpio or Related words with sgpio

sdvo              ulpi              mdio              smbus              ejtag              pmbus              xfi              hssl              ipmb              compactpci              spdif              rateadvanced              versamodule              mphy              hsic              spacewire              usbif              slimbus              superspeed              unipro              mbus              multibus              pciexpress              svid              usart              regpci              uhci              fastbus              cpci              rapidlo              sercos              xaui              lightpeak              perst              futurebus              iosf              rapidio              ccie              uarts              pxie              gipo              cardbus              mvip              powerbus              csafe              vbusp              xhci              srio              mhzadvanced              canbus             



Examples of "sgpio"
SGPIO is essentially another (incompatible) application stack for SPI designed for particular backplane management activities. SGPIO uses 3-bit messages.
The SGPIO specification is maintained by the Small Form Factor committee in the SFF-8485 standard. The International Blinking Pattern Interpretation indicates how SGPIO signals are interpreted into blinking light-emitting diodes (LEDs) on disk arrays and storage backplanes.
The SGPIO signal consists of 4 electrical signals; it typically originates from a host bus adapter (HBA). iPass connectors carry both SAS/SATA electrical connections between the HBA and the hard drives as well as the 4 SGPIO signals.
Applications that require a daisy chain configuration include SGPIO and JTAG.
The original SGPIO stream was intended for a low-cost implementation, and is limited to the capability of representing "activity", "locate", and "fail" LEDs. SGPIO became popular and adopted by HBA backplane and backplane vendors in 2004, and increasingly popular after the support by hardware manufacturers.
SGPIO and the SGPIO spec. is generally adopted and implemented in products from most major HBA and storage controller vendors such as LSI, Intel, Adaptec, Nvidia, Broadcom, Marvell Technology Group and PMC-Sierra. Most products shipping with support for SAS and SATA drives support this standard.
The SGPIO bus has a dedicated clock line driven by the initiator (its maximum clock rate is 100 kHz), although many implementations use slower ones (typically 48 kHz).
SGPIO is typically used in conjunction with SAS or SATA cables, where each physical port is attached to a single disk drive.
The figure shows SGPIO for 4 drive slots (12 clocks), which is the minimum allowed. The SGPIO stream can be larger and it is not uncommon for the stream to consist of slot data for 12, 24 or 36 drives/slots in the case of an expander.
American Megatrends’ Backplane controllers, the MG9071 and MG9072 can used either SES-2 or SGPIO for enclosure management with a simple configuration selection.
There are 3 bits per slot (or hard drive) in the SGPIO specification. This section describes how each of these bits are interpreted according to the IBPI specification.
Although many hardware vendors define their own proprietary LED blinking pattern, the common standard for SGPIO interpretation and LED blinking pattern can be found in the IBPI specification.
SGPIO has been adopted across the storage industry, and has in large replaced proprietary protocols such as SCSI Enclosure Services (SES) and SAF-TE.
These chips will receive 1 or 2 SGPIO streams and drive LEDs accordingly; the latest chip from AMI, the MG9077, can be configured by pull-up and pull-down resistors to adopt to 16 different configurations of SGPIO buses and drive the LEDs accordingly. Since the availability of these chips from AMI, major OEMs including NEC, Hitachi, Supermicro, IBM, Sun Microsystems, and others are using them on their backplanes to receive the SGPIO streams from a variety of HBA vendors and on-board controller chips to consistently drive LEDs with a pre-determined blinking pattern.
In higher end systems initiators are capable of providing additional useful status information, such as rebuilding drives and predicted failures of drives. There was no standard for representing these conditions in the original SGPIO specification, at the same time as efforts were being made to elaborate a variety of additions to the standard by component vendors. This resulted in the IBPI specification, which uses blinking frequencies of bits in the SGPIO stream to represent additional states of drives.
The figure below shows the relationship between SClock, SLoad and the two data bits; SDataOut and SDataIn. An SGPIO frame is started after SLoad has been low for at least 5 SClock cycles.
Backplanes for SAS and SATA HDDs most commonly use the SGPIO protocol as means of communication between the host adapter and the backplane. Alternatively SCSI Enclosure Services can be used. With Parallel SCSI subsystems, SAF-TE is used.
Many SPI chips only support messages that are multiples of 8 bits. Such chips can not interoperate with the JTAG or SGPIO protocols, or any other protocol that requires messages that are not multiples of 8 bits.
"States" for drives or slots can be, for example, "empty", "failed", "rebuilding", etc. The "state" of a drive or slot is determined by the host bus adapter, and is typically transmitted to the backplane through SGPIO-signals on a cable.
The SGPIO bus consists of 4 electrical signals. It "originates" (or is driven by) an "initiator", typically a host bus adapter or SAS Expander, and arrives at a "target", typically a backplane.