SuperTrak66™ User's Manual

Appendix G

IxWorks An O/S built for dedicated processors. In the case of SuperTrak, IxWorks uses an I2O 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.

MB Megabyte: 1,048,576 bytes. 1,0241,024; 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.

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Promise Technology 66 Pro user manual Appendix G