I/O Interfaces
Serial Attached SCSI
Expanders
Similar to Ethernet Switches.
SAS Expanders Create an ‘on demand’ connection.
Expanders can be Daisy Chained
Allow SATA Tunnelling
SATA Tunnelling is how we mix SAS and SATA drives in a single environment
as both drive types use a different command set.
SATA drives can connect through a SAS interface, but SAS cannot connect
through a SATA interface.