Promise Technology 66 Pro - Manual (Page 152)

SuperTrak66™ User's Manual Appendix G
G-3
EIDE Enhanced Integrated Device Electronics: An I/O data bus model used
by ATA and ATAPI devices. This model is superior to IDE allowing the
addition of larger capacity devices through LBA addressing, and better
performance through faster PIO and DMA data transfer specificat ions.
flash A term used loosely to describe the ability to upload and download
memory images to/from NVRAM in order to update some type of
system software.
flush A term describing the action of taking data written to cache memory
and writing the data out to the disk.
GB Gigabyte: 1,073,741,824 bytes. 1,024
•
1,024
•
1,024; commonly
mistaken for 1,000,000,000 which is incorrect. 1,073,741,824 is
derived from the base 2 (binary) numbering system.
geometry A set of values which numerically describe the address limits of a
media device, and enables software and hardware to fully control the
device. CHS and LBA are types of geometry.
HDM Hardware Driver Module: A software component of IxWorks which is
used to access hardware devices attached through a local bus.
hot spare A drive which remains attached to the RAID controller system, but is
unassigned to any particular array. In the event of a drive fault in a fault
tolerant array, the drive is activated to take the place of the failed drive.
hot swap The ability to install/remove drive(s) from a system while it is still
powered up and running. A system supporting hot swap should not
have any problem detecting the removal or reattachment of a hot
swapped device. SuperTrak66 takes advantage of hot swapping to
allow removal and replacement of dysfunctional hard drives using the
optional FastSwap66 or SuperSwap66 removable drive housings.
IDE Integrated Device Electronics: An I/O data bus model used by ATA
and ATAPI devices.
I/O Input / Output: A term loosely used to describe the movement of data
to and from hardware devices.
IP Internet Protocol: Often referred to as “IP Address.” IP is a series of 4
numbers separated by “.” (ex. “127.0.0.1”.) The IP represents a
unique system on a network that may be communicated with. Each
number may hold a value with ranges from 0 (zero) to 255. This
translates to over 4 billion possible combinations of addresses.
I
2
O Intelligent Input/Output: A message-based I/O architecture.
ISM Intermediate Software Module: A software component of IxWorks used
to access devices hosted by a HDM as used by SuperTrak. The ISM
is more intelligent and provides features like RAID and caching.