The definitions of some storage-related terminology differs between IBM and HP.
| IBM term | IBM definition | HP term | HP definition |
|---|---|---|---|
| container | A visual user-interface component that holds objects. | container | (1) Any entity that is capable of storing data, whether it is a physical device or a group of physical devices. (2) A virtual, internal controller structure representing either a single disk or a group of disk drives that are linked as a storageset. Stripesets and mirrorsets are examples of storageset containers that the controller uses to create units. |
| device | A piece of equipment that is used with the computer. A device does not generally interact directly with the system, but is controlled by a controller. | device | In its physical form, a magnetic disk that can be attached to a SCSI bus. The term is also used to indicate a physical device that has been made part of a controller configuration; that is, a physical device that is known to the controller. Units (volumes) can be created from devices, after the devices have been made known to the controller. |
| just a bunch of disks (JBOD) | See non-RAID. | just a bunch of disks (JBOD) | A group of single-device logical units not configured into any other container type. |
| mirrorset | See RAID 1. | mirrorset | A RAID storageset of two or more physical disks that maintains a complete and independent copy of all data on the volume. This type of storageset has the advantage of being highly reliable and extremely tolerant of device failure. RAID level 1 storagesets are called mirrorsets. |
| non-RAID | Disks that are not in a redundant array of independent disks (RAID). | non-RAID | See just a bunch of disks. |
| RAID 0 | RAID 0 allows a number of disk drives to be combined and presented as one large disk. RAID 0 does not provide any data redundancy. If one drive fails, all data is lost. | RAID 0 | A RAID storageset that stripes data across an array of disk drives. A single logical disk spans multiple physical disks, allowing parallel data processing for increased I/O performance. While the performance characteristics of RAID level 0 is excellent, this RAID level is the only one that does not provide redundancy. RAID level 0 storagesets are referred to as stripesets. |
| RAID 1 | A form of storage array in which two or more identical copies of data are maintained on separate media. Also known as mirrorset. | RAID 1 | See mirrorset. |
| RAID 5 | A form of parity RAID in which the disks operate independently, the data strip size is no smaller than the exported block size, and parity check data is distributed across the disks in the array. | RAID 5 | See RAIDset. |
| RAIDset | See RAID 5. | RAIDset | A specially developed RAID storageset that stripes data and parity across three or more members in a disk array. A RAIDset combines the best characteristics of RAID level 3 and RAID level 5. A RAIDset is the best choice for most applications with small to medium I/O requests, unless the application is write intensive. A RAIDset is sometimes called parity RAID. RAID level 3/5 storagesets are referred to as RAIDsets. |
| partition | A logical division of storage on a fixed disk. | partition | A logical division of a container represented to the host as a logical unit. |
| stripeset | See RAID 0. | stripeset | See RAID 0. |