Table of Contents
Advertisement
Glossary
request's execution. 2. Short for rotational latency, the time between the
completion of a seek and the instant of arrival of the first block of data to be
transferred at the disk's read/write head.
Logical Drive
The logical devices presented to the operating system. System drives are
presented as available disk drives, each with a capacity specified by the
Mylex RAID controller. See also Storage Device.
Logical Drive States
A logical (system) drive can be Online, Critical, or Offline. Notice that the
term "online" is used for both physical and logical drives.
LUN
Logical Unit Number, a SCSI representation of a system drive on a given
channel and target ID. This may be a single device or an array of devices
configured to behave as a single device.
LUN Mapping
A method whereby a LUN ID is assigned to a system drive, allowing a LUN
to be made accessible through specific controllers and ports using system
drive affinity.
LVD
Low Voltage Differential, a form of SCSI signaling introduced with Ultra2
SCSI (Fast 40 SCSI). LVD uses data high and data low signal lines to
increase transmission distances over those of single-ended (conventional
SCSI signaling) lines. LVD allows for cable lengths of up to 12 meters
Glossary-12
GAM Client User's Guide
Advertisement
Table of Contents
Need help?
Do you have a question about the Global Array Manager and is the answer not in the manual?
Questions and answers