
U
Ultra SCSI. An enhanced small computer system
interface.
unit address. The ESA/390 term for the address
associated with a device on a given control unit. On
ESCON interfaces, the unit address is the same as the
device address. On OEMI interfaces, the unit address
specifies a control unit/device pair on the interface.
utility device. The ESA/390 term for the device used
with the Extended Remote Copy facility to access
information describing the modifications performed on
the primary copy.
V
Versatile Storage Specialist. The web-based
management interface to the Versatile Storage Server.
Vital Product Data (VPD). Information that uniquely
defines the system, hardware, software, and microcode
elements of a processing system.
volume. Refers to a logical volume.
VPD. Vital Product Data.
VS Specialist. See Versatile Storage Specialist.
W
write hit. A write operation where the data that you
requested is in the cache.
write penalty. The term that describes the classical
RAID write operation performance impact.
X
XRC. eXtended Remote Copy.
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Страница 257: ...CPI Diagnostic Progress Code Stop Appendix C Isolating a CPI Diagnostic Progress Code Stop 241...
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Страница 259: ...Glossary of Terms and Abbreviations Copyright IBM Corp 1999 2000 243...
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Страница 279: ...Spine information Enterprise Storage Server VOLUME 3 ESS Service Guide...