Promise Technology 66 Pro - Manual (Page 153)

SuperTrak66™ User's Manual Appendix G
G-4
IxWorks An O/S built for dedicated processors. In the case of SuperTrak,
IxWorks uses an I
2
O message frame architecture and i960
microprocessor.
JBOD Just a Bunch Of Drives: Another term describing the spanning type of
RAID arrays.
KB Kilobyte: 1,024 bytes. commonly mistaken for 1,000 which is incorrect.
1,024 is derived from the base 2 (binary) numbering system.
LBA Logical Block Addressing: LBA is an alternative form of sector
addressing for accessing a media device. It is generally preferred over
the older CHS method. With LBA, each sector on the device is
assigned an address number (in order starting from 0) which
increments for each sector. LBA addresses are typically stored as 32-
bit values, occasionally they are 64-bit.
M B Megabyte: 1,048,576 bytes. 1,024
•
1,024; commonly mistaken for
1,000,000 which is incorrect. 1,048,576 is derived from the base 2
(binary) numbering system.
MBR Master Boot Record: The MBR is contained in the first physical sector
of a hard drive compatible with modern PCs. It contains information
about the partitions on the drive, and where the bootstrap information
is located.
NVRAM NonVolatile RAM: A type of memory that retains its contents after
power is shut down and, later, when power is restored. Unlike ROM
memory, data contained in NVRAM may be written to. The memory
write is a complex (typically proprietary operation) which requires
special software support. This prevents most applications from altering
the contents of the NVRAM. This property makes NVRAM ideal for
usage in flash memory implementations.
O/S Operating System: A term commonly used to reference the CPU
operating system on a platform station/server. Windows NT and Unix
are examples of common operating systems.
pane A segment of an application window, often encapsulated by some type
of border, which contains a separate section of the application.