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RAID — Redundant array of independent disks. A method of providing data
redundancy. Some common implementations of RAID include RAID 0, RAID 1,
RAID 5, RAID 10, and RAID 50. See also mirroring and striping.
RAM — Random-access memory. The system’s primary temporary storage area for
program instructions and data. Any information stored in RAM is lost when you turn
off your system.
R-DIMM — A registered DDR3 memory module.
readme file — A text file, usually shipped with software or hardware, that contains
information supplementing or updating the product’s documentation.
read-only file — A read-only file is one that you are prohibited from editing or
deleting.
ROM — Read-only memory. Your system contains some programs essential to its
operation in ROM code. A ROM chip retains its contents even after you turn off your
system. Examples of code in ROM include the program that initiates your system’s
boot routine and the POST.
ROMB — RAID on motherboard.
SAN — Storage Area Network. A network architecture that enables remote network-
attached storage devices to appear to a server to be locally attached.
SAS — Serial-attached SCSI.
SATA — Serial Advanced Technology Attachment. A standard interface between the
system board and storage devices.
SCSI — Small computer system interface. An I/O bus interface with faster data
transmission rates than standard ports.
SD card — Secure digital flash memory card.
SDRAM — Synchronous dynamic random-access memory.
sec — Second(s).
SEL — System event log.
serial port — A legacy I/O port with a 9-pin connector that transfers data one bit at a
time and is most often used to connect a modem to the system.
service tag — A bar code label on the system used to identify it when you call Dell for
technical support.
SMART — Self-Monitoring Analysis and Reporting Technology. Allows hard drives to
report errors and failures to the system BIOS and then display an error message on the
screen.
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