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SCSI Element Status Codes
SCSI Enclosure Services (SES) devices contains a number of elements, each of which is defined by a one byte SCSI element code. There are many different element codes defined to cover various devices as shown in the list below. List of SES element codes *00h - unspecified *01h - device - disk-drive or other SCSI device *02h - power-supply *03h - cooling *04h - temperature-sensor *05h - door lock *06h - audible alarm *07h - enclosure services controller electronics *08h - SCC controller electronics *09h - nonvolatile cache *0Ah - invalid operation reason - used to determine why an ESI device has failed to complete a command *0Bh - UPS *0Ch - display *0Dh - keypad *0Eh - enclosure *0Fh - SCSI port/transceiver *10h - language *11h - communication port *12h - voltage sensor *13h - current sensor *14h - SCSI target port *15h - SCSI initiator port *16h - simple subenclosure *17h - array device *18h - SAS expander *19h - SAS connector *1Ah-7Fh - reserved *80h-FFh - vendor-specific Ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SCSI
Small Computer System Interface (SCSI, ) is a set of standards for physically connecting and transferring data between computers and peripheral devices. The SCSI standards define commands, protocols, electrical, optical and logical interfaces. The SCSI standard defines command sets for specific peripheral device types; the presence of "unknown" as one of these types means that in theory it can be used as an interface to almost any device, but the standard is highly pragmatic and addressed toward commercial requirements. The initial Parallel SCSI was most commonly used for hard disk drives and tape drives, but it can connect a wide range of other devices, including scanners and CD drives, although not all controllers can handle all devices. The ancestral SCSI standard, X3.131-1986, generally referred to as SCSI-1, was published by the X3T9 technical committee of the American National Standards Institute (ANSI) in 1986. SCSI-2 was published in August 1990 as X3.T9.2/86-109 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SCSI Enclosure Services
SCSI Enclosure Services (SES) is a protocol for more modern SCSI enclosure products. An initiator can communicate with the enclosure using a specialized set of SCSI commands to access power, cooling, and other non-data characteristics. SES devices There are two major classes of SES devices: * Attached enclosure services devices allow SES communication through a logical unit within one SCSI disk drive located in the enclosure. The disk-drive then communicates with the enclosure by some other method, the only commonly used one being Enclosure Services Interface (ESI). In fault-tolerant enclosures, more than one disk-drive slot has ESI enabled to allow SES communications to continue even after the failure of any of the disk-drives. The definition of the ESI protocols is owned by an ANSI committee and defined in their specifications ANSI SFF-8067 and SFF-8045. * Standalone enclosure services enclosures have a separate SES processor which occupies its own address on the SCSI bus. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enclosure Services Interface
The Enclosure Services Interface (ESI) is a computer protocol used in SCSI enclosures. This is part of a chain of connections that allows a host computer to communicate with the enclosure to access its power, cooling, and other non-data characteristics. This overall approach is called SCSI attached enclosure services: The host computer communicates with the disks in the enclosure via a Serial SCSI interface (which may be either FC-AL or SAS). One of the disk devices located in the enclosure is set up to allow SCSI Enclosure Services (SES) communication through a LUN. The disk-drive then communicates with the SES processor in the enclosure via ESI. The data sent over the ESI interface is simply the contents of a SCSI command and the response to that command. In fault-tolerant enclosures, more than one disk-drive slot has ESI enabled to allow SES communications to continue even after the failure of any of the disk- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SCSI Send Diagnostic Command
Small Computer System Interface (SCSI, ) is a set of standards for physically connecting and transferring data between computers and peripheral devices. The SCSI standards define commands, protocols, electrical, optical and logical interfaces. The SCSI standard defines command sets for specific peripheral device types; the presence of "unknown" as one of these types means that in theory it can be used as an interface to almost any device, but the standard is highly pragmatic and addressed toward commercial requirements. The initial Parallel SCSI was most commonly used for hard disk drives and tape drives, but it can connect a wide range of other devices, including scanners and CD drives, although not all controllers can handle all devices. The ancestral SCSI standard, X3.131-1986, generally referred to as SCSI-1, was published by the X3T9 technical committee of the American National Standards Institute (ANSI) in 1986. SCSI-2 was published in August 1990 as X3.T9.2/86-109 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uninterruptible Power Supply
An uninterruptible power supply or uninterruptible power source (UPS) is an electrical apparatus that provides emergency power to a load when the input power source or mains power fails. A UPS differs from an auxiliary or emergency power system or standby generator in that it will provide near-instantaneous protection from input power interruptions, by supplying energy stored in batteries, supercapacitors, or flywheels. The on-battery run-time of most uninterruptible power sources is relatively short (only a few minutes) but sufficient to start a standby power source or properly shut down the protected equipment. It is a type of continual power system. A UPS is typically used to protect hardware such as computers, data centers, telecommunication equipment or other electrical equipment where an unexpected power disruption could cause injuries, fatalities, serious business disruption or data loss. UPS units range in size from ones designed to protect a single computer with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SCSI Element Status Codes
SCSI Enclosure Services (SES) devices contains a number of elements, each of which is defined by a one byte SCSI element code. There are many different element codes defined to cover various devices as shown in the list below. List of SES element codes *00h - unspecified *01h - device - disk-drive or other SCSI device *02h - power-supply *03h - cooling *04h - temperature-sensor *05h - door lock *06h - audible alarm *07h - enclosure services controller electronics *08h - SCC controller electronics *09h - nonvolatile cache *0Ah - invalid operation reason - used to determine why an ESI device has failed to complete a command *0Bh - UPS *0Ch - display *0Dh - keypad *0Eh - enclosure *0Fh - SCSI port/transceiver *10h - language *11h - communication port *12h - voltage sensor *13h - current sensor *14h - SCSI target port *15h - SCSI initiator port *16h - simple subenclosure *17h - array device *18h - SAS expander *19h - SAS connector *1Ah-7Fh - reserved *80h-FFh - vendor-specific Ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
