I picked up a 6TB WD/Hitachi data centre drive pretty cheaply, and was hoping to use it to upgrade my 2TB drive.
I’ve used my cloning script to create the cloned disk, and that all seemed to work without trouble (I’ve tested the script on 1TB and 2TB disks previously).
However, when I hook it up to the controller, it comes up with white light, starts up the HDD, whirrs for a while, and then the light flashes off briefly, and the whole sequence starts again, repeating every couple of minutes or so.
I’ve tried 4s and 40s resets, but no joy.
What I have noticed is that the bigger drive has a higher 12V current requirement than the WD Red (0.8A, rather than 0.45A). Monitoring the 12V input on startup, I do see it dip a little below 12V at first (~11.8V), but it seems to hold steady at 12.1V during the cycling. The 5V and 12V supplies to the drive also look steady (with a DMM: need to monitor with a scope to check for short duration spikes). Assuming 90% efficiency in the SMPS devices for the supplies, that will require about 1.2A at the input. Which doesn’t allow much spare from the 1.5A wall wart to drive the 1.8V and 3.3V supplies for the control electronics. Am rummaging around for a beefier 12V supply…
So, the questions:
- any suggestions for other causes of the white light cycle?
- what is the maximum rated current you have seen on replacement drives that you have got working?