Symptoms
This Customer Notification pertains to SCv20x0 and SC4020 Storage Center systems and the type of Uninterruptible Power Supply (UPS) being used. It contains specific information related to system features and/or functionality.
Notification:
During a power outage scenario, there is a possibility that SCv20x0 and SC4020 Storage Center systems may have an unplanned controller reset when operating off UPS power if the model of UPS being used does not have the output type of pure sine wave.
Testing has determined that most UPS models utilizing modified sine wave / stepped square wave output type may have a longer "switchover" time to batteries when AC is lost and therefore the controllers may not survive this duration of the switch to UPS power.
Affected versions:
All SCv20x0 and SC4020 Storage Center systems regardless of SCOS version.
Resolution:
The recommendation is to only utilize a UPS with pure sine wave output type with a transfer time of less than 10msec.
Affected Products
Dell Compellent SC4020, Dell Storage SCv2000, Dell Storage SCv2020, Dell Storage SCv2080