Specifications

HSC Functional Specifications QSSC-S4R Technical Product Specification
316
31.7 Disk Management
31.7.1 Drive Fault Light Control
The HSC activates and deactivates drive fault LEDs according to the states received via SAFTE or SES pages, or the
SGPIO bus. Only the host bus adapter can change the state of a disk.
IPMI commands can be used to toggle the drive fault LEDs for diagnostic purposes. The HSC does not have control of
the green drive ready / activity LEDs. Disk hardware controls these LEDs.
31.7.2 Drive Presence Detection
The HSC detects drive presence and makes this information available via SAF-TE, SES2, and IPMI. It is the HSC
firmware’s responsibility to make sure that the drive presence signals have been properly de-bounced.
31.7.3 Enclosure Temperature Sensing
A temperature sensor device is connected to the HSC via a private I
2
C bus. This device monitors the enclosure
temperature. The temperature can be read via SAF-TE, SES2, and IPMI commands. Programmable temperature
thresholds are provided via IPMI commands. The HSC can be configured to issue an event message on the IPMB
when a temperature threshold is crossed.
31.8 Slot Status to Fault Light State Mapping
The fault light state for each internal drive slot state is maintained by the hot-swap controller. The HSC supports
various OEM LED models.
Table 207. Slot Status to Fault Light State Mapping
Slot Status Fault Light State
Device
Inserted
Identify Device
Rebuilding
Rebuild
Stopped
Device
Faulty
Predicted
Fault
Fault Light Indicated
Condition
X 0 0 0 0 0 Off No errors
X 0 0 0 0 1 Slow blink Predicted
Fault
X 0 0 0 1 X Steady on Faulted Slot
1 0 1 0 X X Slow blink Rebuild
0 0 1 0 X X Fast blink Rebuild on
empty slot
X 0 X 1 X X Fast blink Rebuild
Interrupted
X 1 X X X X Fast blink Identify Slot
X = don’t care
Fast Blink = ~2.5 Hz
Slow Blink = ~1 Hz.