Disk Backplane Components
The following table lists the disk backplane (DBP) components.
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/SYS/DBP
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FRU
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Disk backplane FRU
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/SYS/DBP/SASEXP
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FRU
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SAS Expander FRU
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/SYS/DBP/SASEXP/PRSNT
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Discrete sensor
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SAS Expander board presence
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01h-ENTITY_ABSENT
02h-ENTITY_PRESENT
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/SYS/DBP/SASEXP/T_CORE
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Threshold sensor
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SAS Expander board temperature, reported by Expander CPLD
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Degrees Celsius
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/SYS/DBP/HDD[0-x]
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Pseudo
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Hard disk drives
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/SYS/DBP/HDD[0-x]/PRSNT
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Discrete sensor
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Hard disk drive presence
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01h-ENTITY_ABSENT
02h-ENTITY_PRESENT
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/SYS/DBP/HDD[0-x]/STATE
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State sensor
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Hard disk drive state
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02h-DRIVE_FAULT
04h-PREDICTIVE_FAILURE
08h-HOT_SPARE
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/SYS/DBP/HDD[0-x]/SERVICE
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Indicator
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Service Required LED
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Color: Amber
Location: Hard disk drive (HDD)
Off: Normal
On: HDD was diagnosed as faulty
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/SYS/DBP/HDD[0-x]/OK2RM
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Indicator
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OK to remove
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Color: Blue
Location: HDD drive
Off: Normal
On: OK to remove HDD
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/SYS/DBP/NVME[0-x]
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NVMe drives
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/SYS/DBP/NVME[0-x]/PRSNT
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Discrete sensor
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NVMe device presence
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01h-ENTITY_ABSENT
02h-ENTITY_PRESENT
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