HP XP48 Manuel du propriétaire télécharger pdf (Page 109)

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DCR dynamic cache residency (also called Cache LUN XP)

DE Data Exchange software

DFDSS Data Facility Dataset Services

DFSMS Data Facility System Managed Storage

DFW DASD fast write

Disruptive Status that there is no I/O from the host (off-line).

DKA (DisK Adapter) Provides the control functions for data transfer between drives and cache.

The DKA contains DRR (Data Recover and Reconstruct), a parity generator

circuit. It supports four SCSI buses and offers 64 KB of buffer for each SCSI

bus. The DKA also has an internal processor.

DMA0 Controls the data transfer between the ADP and cache.

DMA1 Controls data transfer between the buffers in the DKA and cache.

DMA2 Controls data transfer between the buffers in the DKA and drives.

DMP (Disk Master

Program)

A RAID control layer that provides cache control, logical-to-physical

address translation, and RAID control functions. DMP is located in the DKA.

DMP is recognized by the logical volume number and logical blocked

number.

dr drive

DRIVE Represents a SCSI drive whose internal data format is FBA (fixed length).

DSF Device Support Facilities

DSP (Disk Slave

Program)

A SCSI drive control layer that provides SCSI control, drive data transfer

control, and parity control functions. It is located in the DKA. DSP is

recognized by the physical volume number and LBA number.

DW duplex write

DWL duplex write line

ECKD Extended Count Key Data

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HP XP48 Manuel du propriétaire Page 109