BIOS
Acronym for Basic Input/Output System, firmware providing basic read/write capability.
Configuration
Refers to how a computer is set up, including hardware and software settings.
Device Driver
A program allowing a microprocessor to control a peripheral device.
Domain Validation
Host query to determine a device's communication ability at a negotiated data rate.
Drive Group
Physical drives combined into a single storage space segment.
EEPROM
Memory chip storing configuration info, stable without electricity.
EDLC
Electric Double-Layer Capacitors.
Host
The computer system where a RAID controller is installed.
Hot Spare
An idle standby drive ready for immediate use if another drive fails.
Main Memory
Computer memory directly accessible by the CPU, usually RAM.
NVRAM
Nonvolatile random access memory chip storing configuration information.
PCI
Peripheral Component Interconnect, a local bus for connecting devices to memory.
PCI Express
High-performance local bus for connecting devices, a unifying I/O architecture.
PHY
Interface for transmitting/receiving data packets across a serial bus.
RAID
Redundant Array of Independent Disks, managing multiple drives for reliability/performance.
RAID Levels
Techniques for drive groups to deliver data availability, performance, or both.
SAS
Serial Attached SCSI, an enterprise-level device interface.
SAS Device
Any device conforming to SAS standard and attached via SAS cable.
SATA
Serial Advanced Technology Attachment, a serial link for point-to-point connections.
SSP
Serial SCSI Protocol, enables communication with other SAS devices.
Stripe
The portion of a stripe that resides on a single drive.
Stripe Size
Total drive space consumed by a stripe, excluding parity.
Striping
Writes data across two or more drives for performance, not redundancy alone.
Strip Size
The drive space consumed by a single strip element.
UPS
Uninterruptible Power Supply, provides battery power when AC fails.
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