A memo about Raid manager and LUN
A volume is a disk area that can be formatted into a ** file system, such as "physical disk", "RAID group (virtual disk)", or "LUN", regardless of physical or logical. ** **
** RAID group is also volume, LUN is volume, LVM is volume, / dev / xxx is volume **
RAID devices, storage servers, etc. are recognized as one device from the outside by bundling multiple physical storage devices (hard disks, SSDs, etc.) (Raid group, Raid array), but this is logically divided. By assigning and identifying each LUN, it becomes possible to manage it as different storage (the whole may be one LUN).
** A logically divided area from a RAID group, Raid array or storage pool **