HP Surestore Disk Array FC60 HP SureStore E Disk Array 12H User's and Service - Page 266

Glossary Glossary Maximum Environmental Limit The maximum limit of temperature, humidity, vibration, shock, and altitude, which should not be exceeded during operation of an the product. See Recommended Operating Range. Migration Migration is the movement of data between one RAID mode and another RAID mode. Mirrored Disks A Mirrored Disk is an entire duplication of data. Traditional mirrored disks require disks of identical capacity. The disk array uses a special type of mirroring called RAID 0/1 mode, or Block Mirroring. Multiplexer MUX A device that allows two or more signals to be transmitted simultaneously on a single channel. A multiplexer enables SCSI devices to interface directly with hosts that have Fibre Channel technology. The MUX contains one or two FC ports and up to four fast/wide SCSI differential ports. Offline Online Previously Used Disk Taking a SCSI adapter offline means terminating inputs/outputs and suspending all transactions going from the MUX to the specified SCSI devices. The SCSI adapter is no longer active or available for access. Taking the MUX offline indicates that all SCSI and FC adapters in the MUX are offline. For a SCSI adapter, online indicates the SCSI adapter is active and available for access and input/output processing. For the MUX, online indicates that at least one adapter in the MUX is active and available for access. A disk that has been used in another disk array. The Disk Stamp indicates that this disk was once part of another array. Including it will destroy any data on the disk. Primary Array Controller In disk arrays with two controllers, the Primary Array Controller is the one that manages the disk array hardware devices, such as the fan modules and the control panel display module. 266