Intel SC5400 Product Specification - Page 75

Expander Management EM subsystem of SAS Expander - drivers

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Intel® Server Chassis SC5400 5U Kit TPS Hot Swap Hard Disk Drive Bays ƒ Two multimaster two-wire serial interfaces ƒ Flexible General Purpose I/O for LEDs, Fan Tach, and other functions. The VSC7161* contains all the functions needed to implement a SAS enterprise server or JBOD system. Typically, this device distributes SAS signals to an array of disk drives in either a server or an external enclosure. The embedded v3000 CPU serves as an SMP management application client and can provide enclosure management functions using a two-wire serial interface or vendor-specific SMP implementation. As the SMP management application client, the CPU (in Master mode) handles all SMP initiator requests and all SMP response functions. 6.2.1.1 Expander Management (EM) subsystem of SAS Expander The VSC7161* Serial Attached SCSI Expander embeds an Expander Management (EM) subsystem that implements SMP dual-function target and initiator ports for in-band, vendorunique enclosure management control. A 75 MHz v3000 CPU with 32 KB of zero wait-state internal SRAM is included in the Expander Management (EM) subsystem. An external flash ROM stores the code for the v3000 CPU. In Master mode HSBP adopts, the v3000 CPU provides all Enclosure Management services using the Vitesse* Software Development Kit (SDK). The v3000 CPU communicates with other devices in the enclosure through several two-wire serial interface ports, general purpose I/O, and LED drivers. It assembles enclosure status for transmission to the host controller through vendor-unique SMP frames or SSP frames for inband SCSI Enclosure Services (SES) or through a two-wire serial interface port. The figure below shows the architecture of Expander Management (EM) subsystem. Figure 25. Expander Management(EM) subsystem Revision: 1.0 65

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Intel® Server Chassis SC5400 5U Kit TPS
Hot Swap Hard Disk Drive Bays
Revision: 1.0
65
Two multimaster two-wire serial interfaces
Flexible General Purpose I/O for LEDs, Fan Tach, and other functions.
The VSC7161* contains all the functions needed to implement a SAS enterprise server or JBOD
system. Typically, this device distributes SAS signals to an array of disk drives in either a server
or an external enclosure. The embedded v3000 CPU serves as an SMP management
application client and can provide enclosure management functions using a two-wire serial
interface or vendor-specific SMP implementation. As the SMP management application client,
the CPU (in Master mode) handles all SMP initiator requests and all SMP response functions.
6.2.1.1
Expander Management (EM) subsystem of SAS Expander
The VSC7161* Serial Attached SCSI Expander embeds an Expander Management (EM)
subsystem that implements SMP dual-function target and initiator ports for in-band, vendor-
unique enclosure management control.
A 75 MHz v3000 CPU with 32 KB of zero wait-state internal SRAM is included in the Expander
Management (EM) subsystem. An external flash ROM stores the code for the v3000 CPU. In
Master mode HSBP adopts, the v3000 CPU provides all Enclosure Management services using
the Vitesse* Software Development Kit (SDK).
The v3000 CPU communicates with other devices in the enclosure through several two-wire
serial interface ports, general purpose I/O, and LED drivers. It assembles enclosure status for
transmission to the host controller through vendor-unique SMP frames or SSP frames for in-
band SCSI Enclosure Services (SES) or through a two-wire serial interface port.
The figure below shows the architecture of Expander Management (EM) subsystem.
Figure 25. Expander Management(EM) subsystem