Filesystems

Category

6 articles

• 01
  ext2

  Block groups, the superblock, and the direct/indirect pointer tree an ext2 inode uses to find its own data, the on-disk layout underneath the VFS abstractions.

• 02
  FAT

  Reading and writing the FAT filesystem, still one of the simplest formats to implement.

• 03
  initrd and RAM Disk Filesystems

  Why a kernel needs a temporary in-memory filesystem before it can mount its real root, and how a ramdisk built entirely from an already-loaded image breaks that cycle.

• 04
  ISO 9660

  The read-only disk format behind every bootable CD/DVD image, from the Primary Volume Descriptor to the El Torito extension that makes one bootable at all.

• 05
  Journaling

  Write-ahead logging: how recording intent before touching the main disk structure lets recovery replay or discard incomplete work instead of scanning the whole volume.

• 06
  The VFS

  A virtual filesystem layer that lets a kernel support multiple filesystem formats through one interface.