Linux disk I/O diagram (2024)

Linux Disk I/O subsystem diagram

This diagram represents Linux disk I/O subsystem components and the corresponding commands on each layer.

Linux disk I/O diagram consists from the:

• Application layer
• VFS (Virtual Filesystem):
  • Direct I/O or
  • Buffer+Page Cache 
• Filesystem Layer
• Optional block layer
• Generic block layer
• Disk scheduler layer:
  • BLK-Mq or
  • Clasic I/O scheduler (noop, anticipatory, deadline, cfq, ...)
• Block device driver layer
• Device driver
• Hardware:
  • RAID controller or
  • Disk controller
• Hard disk drives (HDD, SSD, NVMe, ...).

This diagram is integral part of the book:

Operativni sustavi i računalne mreže - Linux u primjeni

https://doi.org/10.5281/zenodo.8119310

Disk IO-ALL-expanded-poster--EN.pdf