![]() Pero como la Luna demora aproximadamente 28 días en repetir sus fases, ella pasa no sólo por las cuatro antes mencionadas, sino que por infinitas fases intermedias a las cuales la tradición no les ha puesto nombre. Any remaining capacity can then be 'sliced' into additional logical unit number (LUNs) as required. Normalmente, conocemos cuatro tipos de fase lunar, que son la Luna Nueva, Cuarto Creciente, Luna Llena y Cuarto Menguante. The logical unit number (LUN), when presented to the host, shows as a mountable volume of the same capacity as the ‘slice’ configured by the administrator, hiding any remaining capacity on that RAID group. In terms of LUN management, the LUN can either be configured as a small ‘slice’ of the total usable capacity of the RAID group, or configured to use the total space available within that RAID group, (dependant on the requirements of the application that it wishes to use it). ![]() In order to do this, an administrator must create a LUN which can be presented to and mounted on a host operating system. However, a RAID group (being the underlying structure of that group of physical disks), is not presentable to the host. ![]() These RAID groups define the manner in which the group of physical disks handle data when it is written to the disks within that group (and as such, the way in which that data is protected). The disks in an array are usually configured into smaller sets (Raid groups) to provide protection against failure. Internal architecture and front end connections aside, the primary reason for purchasing a disk array is to provide data storage capacity through presenting a number of physical disks, and making them available and configurable to the IT administrator for the purposes of distributing portions of that capacity (e.g. ![]()
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