Intel is trying to modify that with a new form factor for SSDs that could push server size into the petabyte range. It’s called the “Ruler” form factor. Unsurprisingly, Intel’s new SSDs in the Ruler form factor is shaped like a ruler. They’re long and skinny, eschewing the legacy 2.5 and 3.5-inch chassis limits of current consumer SSDs. These drives don’t need to be any shape to start with, as they’re just stacked solid state NAND chips inside.