A RAID technology designed to string many peripherals together onto a single controller.
It uses a SCSI bus to connect other Mass Storage Device like HDD, SDD, Floppy drives, etc.
It comes in PATA and SATA forms, but both have the same command set, so the 2 technologies can be used in same computer.
SCSI Interfaces
Daisy Chaining
- Connecting each device with PATA
- Allows for 16 devices in a chain
SCSI ID
ID for each physical device. Is not able to see smaller storage drives
Logical Units (LUNs)
- Allows viewing of smaller storage drives within a larger SCSI device like storage arrays or virtual machines
- Allows for identifying Partitions
Terminators
A device to tell when the chain ends. Required to allow for several communications simultaneously
SAS (Serial Attached SCSI) Forms
An enhancement to SCSI technology that uses point-to-point connections rather than daisy chains.
SAS-4: Provides speeds up to 22.5 Gbps