What’s the final word on whether SSDs need to be dd-ed before deploying aerospike? I find the information in the docs a bit confusing. The SSD Initialization page says:
"The drives must be erased or zeroed out before use"
and then the following only mentions adding disks, not creating nodes with an initial disk:
"Starting from version 3.3.5, you no longer need to dd the existing remaining disks when adding a new disk or replacing an existing disk with a new disk in an existing namespace."
Also the AWS recommendations page says the following where pre-warming is done with dd as well:
"The I2, R3, and HI1 instance types use direct-attached solid state drives for instance (ephemeral) storage that provide maximum performance at launch time, without pre-warming."
So what does this mean - when creating a new node on EC2 i2 instance type, with aerospike 3.5 or 3.6 do I have to dd the disks first or not? If I there is no need to dd the disks how does aerospike know which parts of the disk have valid data and which ones not?