Donegal tweed manufactured for centuries it took on its modern form in the 1880s, largely due to the pioneering work of English philanthropist Alice Rowland Hart. While the weavers in County Donegal produce a number of different tweed fabrics, including herringbone and check patterns, the area is best known for a plain-weave cloth of differently-coloured warp and weft, with small pieces of yarn in various colours woven in at irregular intervals to produce a heathered effect. Such fabric is often labelled as "donegal" (with a lowercase "d") regardless of its provenance. Along with Harris Tweed manufactured in the Scottish Highlands, Donegal is
Fabric OS MontaVista, switches and directors have the ability of hot firmware activation (without downtime for Fibre Channel fabric), and many useful diagnostic commands. According to free software licenses terms, Brocade provides access to sources of distributed free software, on which Fabric OS and other Brocade's software products are based. Additional products for Fabric OS are offered by Brocade for one-time fee. They are licensed for use in a single specific switch (license key is coupled with device's serial number). Those include: Fabric OS In storage area networking, Fabric OS is the firmware for Brocade Communications Systems's Fibre Channel switches and Fibre