Table 8. Ethernet connector LEDs
Link/Activity LED (Left) State
Off
No Link
On
Link
Blinking Activity
Table 9. Ethernet connector LEDs
Speed LED (Right) State
Off
10-Base-T
On
100-Base-TX
SAS Connections
The ESM has three mini-SAS-HD (SFF-8644) connector receptacles. By default each is configured as an
SAS-3 universal port. They may be connected to other universal ports or end devices (for example, HBAs).
Drive Carrier Module (2U Enclosures)
The drive carrier module comprises a hard disk held by a carrier.
• Each 2U12 drive bay holds a single low profile 1.0 inch high, 3.5 inch form factor disk drive in its carrier.
Drives are horizontal.
– 2.5" to 3.5" carrier adapter available to accommodate 2.5" drives.
• Each 2U24 drive bay holds a single low profile 5.8 inch high, 2.5 inch form factor disk drive in its carrier.
Drives are vertical.
The carriers have mounting locations for direct dock SAS drives.
A sheet steel carrier holds each disk drive: which provides thermal conduction, radio frequency and
electromagnetic induction protection and physically protects the drive.
The front cap also has an ergonomic handle which gives the following functions:
• Secure location of the carrier into and out of drive bays.
• Positive ‘spring loading’ of the drive/midplane connector.
The carrier can use these interfaces:
• Dual path direct dock Serial Attached SCSI.
Chapter 2. System Overview 27
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