A data center employee told me a story about 25 years ago, explaining why that data center took some time to assemble a RAID array. Recently, I wasn't able to verify the facts by googling, and I may misremember some details, but maybe someone here has relevant information.
The story went like this: the data center had assembled a RAID array from brand new disks, which were among the first to support the then-new SMART features. After some time, all those disks failed at the same time, taking the RAID with them. After a lot of debugging and discussion with the manufacturer, it turned out that the firmware had a bug in one of the SMART counters (probably power on hours?) which led to the disk becoming unresponsive when the counter overflowed. As all the disks were powered up/down simultaneously, the bug manifested in all of them at the same time.
This led to the data center taking time to assemble new RAIDs: power on one disk, wait a day, power on a second, wait a few hours, then add the others, always with a few hours between disks.
I wasn't able to find anything on the internet about the exact time, brand of hard drives, and detailed information about this bug - does anyone remember this a bit better?