I have been using a Supermicro M28SAB 8in2 2,5" hot swap backplane for a year now. There is one thing that has been bothering me from the start; with some SSDs the activity leds work in reverse. They stay on all times and go off when there is disk activity. HDDs and Intel X25M-G2 SSDs seem to work fine, but ALL Sandforce based and Samsung drives have this issue. I have checked the manual for possible jumper changes but no luck there.
I contacted Supermicro support about this. Here's the response:
"The activities LED is control by hard drive on pin 11. By the default, if user using SAS hard drive the LED will turn on solid and blink when there is activities. If using SATA hard drive the LED will be turn off and blink when there is activities."
I don't think that all Sandforce and Samsung SSDs are SAS....
Has anyone else experienced this or is there a logical explanation? I know it's not a world breaking issue but feels kinda abnormal, especially on a backplane at this price.
I contacted Supermicro support about this. Here's the response:
"The activities LED is control by hard drive on pin 11. By the default, if user using SAS hard drive the LED will turn on solid and blink when there is activities. If using SATA hard drive the LED will be turn off and blink when there is activities."
I don't think that all Sandforce and Samsung SSDs are SAS....
Has anyone else experienced this or is there a logical explanation? I know it's not a world breaking issue but feels kinda abnormal, especially on a backplane at this price.