IBM Small J10 Series, Руководство пользователя

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Figure 7. 580W PCM LEDs
Table 4. LEDs - 580W PCM
PCM LED
LED behavior status
PCM OK Green
AC Input Fail Amber
Fan Fail Amber
DC Output Fail Amber
Multiple PCMs
The IBM COS small disk enclosure system includes two PCMs in multiple PCMs that provide redundant
power control for the system. This is done so that if one PCM fails, the other(s) maintains the power
supply and enclosure operation is not affected while you replace the faulty module.
PCMs are hot-pluggable and replacement should only take a few seconds to do. Replacement must be
completed within a few seconds after the removal of the defective PCM.
Note: Important Operation of the enclosure with ANY modules missing will disrupt the airflow and the
drives will not receive sufficient cooling. It is ESSENTIAL that all apertures hold active or dummy drives
before you switch on the enclosure system.
Multiple power supply unit modules
The storage system includes two PSUs which provide redundant power control for the system so that if
one module fails, the other maintains the power supply, and enclosure operation is not affected while you
replace the faulty module.
8 IBM Cloud Object Storage System: IBM Small J10 Disk Enclosure Manual