ata_devchk(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ata_devchk(9) 💅

Okay bestie, welcome to the kernel API manual ✨ this one is a whole little function from the ATA world and it's literally just vibe-checking whether a PATA device is even there. Short page, but we're gonna give it the attention it deserves 🫶

🌸 NAME 🌸

ata_devchk — PATA device presence detection 👀

✨ SYNOPSIS ✨

bool ata_devchk (struct ata_port *ap , unsigned int device );

🎀 ARGUMENTS 🎀

  • ap — the ATA channel you want to examine 🔍
  • device — which device on that channel to examine, and ngl it starts counting at zero (0) 🍓

🦋 DESCRIPTION 🦋

So this technique? Not even new. It was originally described in Hale Landis's ATADRVR (that's www.ata-atapi.com, iykyk), and then later it found its way into the ATA/ATAPI spec. So it's giving "legacy icon that got canonized" 👑

The move itself is lowkey cute: you write a pattern to the ATA shadow registers, and if a device is actually present, it'll respond by correctly storing and echoing back the ATA shadow register contents. Like a little "hi, I'm here" text back 💌 No device, no reply, no notes.

LOCKING: caller. That means you, bestie — the caller handles the locking, not this function 🙈

⭐ RETURN ⭐

Returns true if the device is present, and false if it's not. That's it. Binary queen behavior, no cap 💅

🌈 SEE ALSO 🌈

Kernel file ./drivers/ata/libata-sff.c plus this whole friend group of functions:

And that's the page, bestie 🧚 This little icon lives in ./drivers/ata, it's dated October 2026, and it answers to the name ata_devchk(9). Take care of her, mwah 💖✨🎀

📦 where this page comes from