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16-474: A WWN may be employed in a variety of roles, such as a serial number or for addressability ; for example, in Fibre Channel networks, a WWN may be used as a WWNN (World Wide Node Name) to identify an endpoint, or a WWPN (World Wide Port Name) to identify an individual port on a switch. Two WWNs which do not refer to the same thing should always be different even if the two are used in different roles, i.e.

32-597: A deterrent against theft and counterfeit products, as they can be recorded, and stolen or otherwise irregular goods can be identified. Banknotes and other transferable documents of value bear serial numbers to assist in preventing counterfeiting and tracing stolen ones. They are valuable in quality control , as once a defect is found in the production of a particular batch of product, the serial number will identify which units are affected. Some items with serial numbers are automobiles , firearms , electronics, and appliances. In smartphones , serial numbers are extended to

48-539: A different way to arrange and/or interpret these components. OUIs are used with the U/L and multicast bits zeroed, or sometimes even omitted (and assumed zero), though CID has U/L set to 1. The WWN formats include: WWN addresses are predominantly represented as colon separated hexadecimal octets, MSB-first, with leading zeros — similar to Ethernet 's MAC address . However, there is much variance between vendors. Linux uses WWN to identify disks by providing symbolic links to

64-444: A fixed number of bits, and will wrap around after sufficiently many numbers have been allocated. Thus, recently allocated serial numbers may duplicate very old serial numbers, but not other recently allocated serial numbers. To avoid ambiguity with these non-unique numbers, RFC   1982 "Serial Number Arithmetic", defines special rules for calculations involving these kinds of serial numbers. Lollipop sequence number spaces are

80-493: A role such as WWPN or WWNN does not define a separate WWN space. The use of burned-in addresses and specification compliance by vendors is relied upon to enforce uniqueness. Each WWN is an 8- or 16-byte number, the length and format of which is determined by the most significant four bits, which are referred to as an NAA (Network Address Authority). The remainder of the value is derived from an IEEE OUI (or from Company Id (CID)) and vendor-supplied information. Each format defines

96-757: A single instance of something. For example, the International Standard Serial Number or ISSN used on magazines, journals and other periodicals , an equivalent to the International Standard Book Number (ISBN) applied to books, is assigned to each periodical . It takes its name from the library science use of the word serial to mean a periodical. Certificates and certificate authorities (CA) are necessary for widespread use of cryptography . These depend on applying mathematically rigorous serial numbers and serial number arithmetic, again not identifying

112-405: A single instance of the content being protected. The term serial number is also used in military formations as an alternative to the expression service number . In air forces , the serial number is used to uniquely identify individual aircraft and is usually painted on both sides of the aircraft fuselage, most often in the tail area, although in some cases the serial is painted on the side of

128-432: Is a unique identifier used to uniquely identify an item, and is usually assigned incrementally or sequentially. Despite being called serial "numbers", they do not need to be strictly numerical and may contain letters and other typographical symbols , or may consist entirely of a character string . Serial numbers identify otherwise identical individual units, thereby serving various practical uses. Serial numbers are

144-610: Is being used so there is a chance you must have SYMCLI software installed. syminq comes with SYSCLI. syminq is also helpful in getting WWN in easy way. It will work if hbanyware package is installed. systool utility comes with Linux distros. If it is not available it can be installed on servers where HBA is already installed. OUIs can be queried searching the IEEE organization's Public Manufacturers OUI list . OUIs can also be queried by searching IEEE Standards Registration authority [1] . Serial number A serial number

160-434: Is found to be using the software, the legitimate user can be identified from the code. It is usually not impossible, however, for an unauthorised user to create a valid but unallocated code either by trying many possible codes, or reverse engineering the software; use of unallocated codes can be monitored if the software makes an Internet connection. The term serial number is sometimes used for codes which do not identify

176-595: The Shuttleworth Collection , or K5054 —the prototype Supermarine Spitfire . The serial number follows the aircraft throughout its period of service. In 2009, the U.S. FDA published draft guidance for the pharmaceutical industry to use serial numbers on prescription drug packages. This measure is intended to enhance the traceability of drugs and to help prevent counterfeiting . Serial numbers are often used in network protocols . However, most sequence numbers in computer protocols are limited to

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192-613: The aircraft's fin/rudder(s). Because of this, the serial number is sometimes called a tail number . In the UK Royal Air Force (RAF) the individual serial takes the form of two letters followed by three digits, e.g., BT308 —the prototype Avro Lancaster , or XS903 —an English Electric Lightning F.6 at one time based at RAF Binbrook . During the Second World War RAF aircraft that were secret or carrying secret equipment had "/G" (for "Guard") appended to

208-474: The integrated components in addition to the electronic device as a whole, also known as serialization. This gives unique individual parts such as the screen, battery, chip and camera a separate serial number. This is queried by the software for proper release for use. This practice by manufacturers limits the serial number electronic devices. Serial numbers may be used to identify individual physical or intangible objects; for example, computer software or

224-670: The real device entry: (There are more entries in this directory which are omitted here) The target names (sr0, sda) might change when new devices are added to the computer (e.g. sda might become sdb) but the WWN will be the same. That is an advantage when the WWNs are used in configuration files and scripts, e.g., /etc/ fstab . ‹The template How-to is being considered for merging .›   There are various ways how to find WWN information. Regardless of HBA type, below commands can be used to find WWN number information. If EMC Storage

240-430: The right to play an online multiplayer game. The purpose and application is different. A software serial number, otherwise called a product key , is usually not embedded in the software but is assigned to a specific user with a right to use the software. The software will function only if a potential user enters a valid product code. The vast majority of possible codes are rejected by the software. If an unauthorised user

256-499: The serial, denoting that the aircraft was to have an armed guard at all times while on the ground, e.g., LZ548/G —the prototype de Havilland Vampire jet fighter , or ML926/G —a de Havilland Mosquito XVI experimentally fitted with H2S radar . Prior to this scheme the RAF, and predecessor Royal Flying Corps (RFC), utilised a serial consisting of a letter followed by four figures, e.g., D8096 —a Bristol F.2 Fighter currently owned by

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