Specifications

QSSC-S4R Technical Product Specification HSC Functional Specifications
315
Table 206. Cable Detect Configuration
Cable A Detected Cable B Detected Configuration
No No Invalid Configuration: will use 8 disks by default.
No Yes Invalid configuration: will use 8 disks by default.
Yes No Will use 4 disks.
Yes Yes Will use 8 disks.
31.3 System Event Log (SEL)
The VSC410 controller does not implement a system event log. Instead, SEL entries are maintained by the BMC. If the
BMC is unable to accept platform event messages, the VSC410 does not cache the entries.
31.4 Sensor Data Repository (SDR)
The VSC410 controller does not implement a sensor data repository. Instead, the BMC maintains the HSC SDR
entries.
31.5 Field Replaceable Unit (FRU) Inventory Device
The VSC410 supports an I
2
C-compatible EEPROM for FRU storage located at address 0xAC.The EEPROM is on a
private I
2
C bus, and is accessible only by the HSC, or through Master write-read I
2
C commands.
The FRU storage contains:
x Common header
x Internal use area
x Board information area
The FRU device information can be accessed through IPMI commands with a FRU device ID of 00h. The FRU file
must be uploaded to the FRU EEPROM using an Intel FRUSDR utility.
31.5.1 HSC FRU Format
The FRU inventory area format follows the Platform Management FRU Information Storage Definition. See Platform
Management FRU Information Storage Definition, Version 1.0.
The HSC provides only low-level access to the FRU inventory area storage. It does not validate or interpret the data
written to the FRU, including the common header area. Applications cannot relocate or resize FRU inventory areas.
The HSC provides 256 bytes of non-volatile storage to hold the serial number, part number, and other FRU inventory
information about the hot-swap backplane. The HSC implements commands that allow this private FRU data to be
written or read via the IPMB.
Note: Fields in the internal use area are not for OEM use. Intel reserves the right to relocate and redefine these fields without prior
notification. Definition of this area is part of the software.
31.6 Temperature Monitoring
The VSC410 HSC supports an I
2
C-compatible temperature sensor located at address 0x90 for backplane temperature
monitoring. This sensor is on a private I
2
C bus that is shared with the FRU storage device.
The HSC monitors and reports the temperature using values that the BMC provides during initialization. The HSC
supports reporting lower critical (lc), lower non-critical (lnc), upper noncritical (unc), and upper critical (uc) thresholds.
Threshold values are reported as going high or going low, depending on the direction of change. The HSC supports
hysteresis values.