HP MSA2324i HP StorageWorks 2000 G2 Modular Smart Array reference guide (50091 - Page 113

Glossary CHAP chunk size dedicated spare default mapping dual-port disk dynamic spare EC EMP FC global spare host IQN iSCSI iSNS jumbo frame leftover loop masking master volume MC metadata network port point-to-point SAS SATA SC secret SES single-port disk Challenge-Handshake Authentication Protocol. The amount of contiguous data that is written to a vdisk member before moving to the next member of the vdisk. A disk that is reserved for use by a specific vdisk to replace a failed disk. Host-access settings that are configured when a volume is created. A dual-port disk is connected to both controllers so its data path is fault tolerant. A properly sized available disk that is automatically assigned, if the dynamic spares option is enabled, to replace a failed disk in a redundant vdisk. Expander Controller. The processor (located in the SAS expander in each controller module and expansion module) that is primarily responsible for enclosure management and SES. Enclosure management processor. An EC subsystem that provides SES data such as temperature, power supply and fan status, and the presence or absence of disks. Fibre Channel interface protocol. A disk that is reserved for use by any redundant vdisk to replace a failed disk. An external port that the storage system is attached to. The external port may be a port in an I/O adapter in a server, or a port in a network switch. iSCSI Qualified Name. Internet SCSI interface protocol. Internet Storage Name Service. In an iSCSI network, a frame that can contain 9000 bytes for large data transfers. A normal frame can contain 1500 bytes. The state of a disk when its metadata says the disk is a member of a vdisk but other members' metadata say the disk isn't a member. The metadata must be cleared before the disk can be used in a new vdisk or as a spare. Fibre Channel Arbitrated Loop (FC-AL) topology. Volume-mapping settings that specify no access to that volume by hosts. A volume that is enabled for snapshots and has an associated snap pool. Management Controller. The processor (located in a controller module) that is primarily responsible for human-computer interface and computer-computer interface functions, and interacts with the SC. Data in the first sectors of a disk drive that stores all disk, vdisk, and volume specific information including vdisk membership or spare identification, vdisk ownership, volumes and snapshots in the vdisk, host mapping of volumes, and results of the last media scrub. The Ethernet port on a controller module through which its Management Controller is connected to the network. Fibre Channel Point-to-Point topology. Serial Attached SCSI interface protocol or disk-drive architecture. Serial ATA disk-drive architecture. Storage Controller. The processor (located in a controller module) that is primarily responsible for RAID controller functions. The SC is also referred to as the RAID controller. For use with CHAP, a password that is shared between an initiator and a target to enable authentication. SCSI Enclosure Services. A single-port disk is connected to both controllers so its data path is not fault tolerant. A single-port disk's type is shown as SAS-S or SATA-S. HP StorageWorks 2000 G2 Modular Smart Array Reference Guide 113