If I'm connecting to the player by using Hijack, is there a way to figure out the available disk space?

Why? When you write a FID using emplode (i.e. the native car player protocol), the player decides which disk to put it on based on free disk space, such that the disks tend to fill up evenly (thus providing you with *two* single points of failure, but I digress...).

To write a FID using Hijack's HTTP server, I need to figure out which disk to write it to myself. So: how do I figure out which disk has the most space available?
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-- roger