HP StorageWorks XP48 - Disk Array Owner's Manual page 109

DCR
DE
DFDSS
DFSMS
DFW
Disruptive
DKA (DisK Adapter)
DMA0
DMA1
DMA2
DMP (Disk Master
Program)
dr
DRIVE
DSF
DSP (Disk Slave
Program)
DW
DWL
ECKD
EOF
dynamic cache residency (also called Cache LUN XP)
Data Exchange software
Data Facility Dataset Services
Data Facility System Managed Storage
DASD fast write
Status that there is no I/O from the host (off-line).
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.
Controls the data transfer between the ADP and cache.
Controls data transfer between the buffers in the DKA and cache.
Controls data transfer between the buffers in the DKA and drives.
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.
drive
Represents a SCSI drive whose internal data format is FBA (fixed length).
Device Support Facilities
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.
duplex write
duplex write line
Extended Count Key Data
end of field
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