Drive bay numbering: SAS expanderDrive bay numbering: SAS expander
When the drive backplane is connected to the SAS expander, the drive numbering is continuous across all the drive boxes.
SAS expander port 1 always connects to the controller port 1.
SAS expander port 2 always connects to the controller port 2.
SAS expander port 3—Drive numbers 1 to 4
SAS expander port 4—Drive numbers 5 to 8
SAS expander port 5—Drive numbers 9 to 12
SAS expander port 6—Drive numbers 13 to 16
SAS expander port 7—Drive numbers 17 to 20
SAS expander port 8—Drive numbers 21 to 24
SAS expander port 9—Drive numbers 25 to 27
Front SFF drive numberingFront SFF drive numbering
Rear SFF drive numberingRear SFF drive numbering