HP NetServer AA 4000 HP Netserver AA Solution Administrator's Guide v - Page 259

IOP link. See IL. lock step. A mode in which two CEs simultaneously execute the same copy of the Windows operating system and any Windows applications. logical disk. A CE disk that is composed of one disk from each IOP. For example: A logical mirror set identified by the name "Disk0" is composed of two physical disks: one residing on IOP1 and the other residing on IOP2. Marathon Interface Card. See MIC. MIC. Marathon Interface Card. A PCI-based Endurance adapter that enables bidirectional communication between systems in an Endurance server. MIC status lights. The lights on the MIC handles that indicate whether various MIC communications are functioning properly. minimum downtime upgrade. A hardware or software upgrade that requires the Endurance server to be shut down (typically for a few minutes) and rebooted. mirror set. The pair of physical SCSI disks (one on each IOP) that function as one logical disk. The disks in a mirror set process and maintain identical information. If a fault occurs on one of the physical disks in a mirror set and the disk cannot be accessed, the Endurance server automatically uses the remaining disk in the mirror set to provide continuous access without losing data or network connectivity. mirrored disk. A physical SCSI disk that resides on the IOP and stores data for the Endurance server, and for which there is a corresponding disk on the other IOP. See also mirror set. mirroring. A process for creating and maintaining a set of identical disk images on separate physical SCSI disks. See also mirror set. non-identical disks. SCSI disks configured as a mirror set that share SCSI variety characteristics, such as both being wide or both being narrow, but may be different sizes, and may also have different model numbers, or be from different manufacturers. See also mirror set. non-mirrored device. A device in an Endurance configuration that does not have a redundant counterpart, such as a tape drive, a floppy disk, or a CD-ROM. If a non-mirrored device is failed out of an Endurance configuration, it has no counterpart to provide continuous device access. A non-mirrored device cannot be failed over automatically. offline. A component state that indicates the component cannot communicate with the rest of the Endurance server configuration. For component specific information on this state, refer to Chapter 2. online. A component state that indicates the component can communicate with the rest of the Endurance server configuration. Some components transition from this state to active. For component specific information on this state, refer to Chapter 2. pointer. An industry-standard term for devices such as a mouse, trackball, or touchpad. HP Netserver AA Solution Administrator's Guide Glossary-3