https://nalar.dev/tags/block-devices/ Recent content in Block Devices on Nalar Hugo en-us Mon, 26 Oct 2026 00:00:00 +0000 https://nalar.dev/why-linux-filesystem-tools-report-different-types/ Mon, 26 Oct 2026 00:00:00 +0000 https://nalar.dev/why-linux-filesystem-tools-report-different-types/ <p>A disk partition can contain an ext4 filesystem while a process sees an <code>overlay</code> filesystem at <code>/</code>. Meanwhile, <code>/proc/filesystems</code> may list <code>tmpfs</code> and <code>nfs</code>, neither of which needs a local partition. These are not conflicting answers. They describe different parts of the Linux storage stack.</p> <p>The distinction matters when identifying a volume, investigating an unexpected mount, or checking which filesystem handles an application&rsquo;s path. A filesystem signature on a device is not the same thing as a mounted filesystem in a process&rsquo;s namespace.</p>