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Disks From the Perspective of a File System

Marshall Kirk McKusick prefacing an ACM article about the complexity of dealing with hard disks:

Disks lie. And the controllers that run them are partners in crime.

The article focuses on some of the traps a file system may fall into if it doesn’t know all the details of the underlying hardware: fsync notifications when data is only in the disk controller buffer, ATA disks not implementing correctly Tag Command Queueing, etc.

Original title and link: Disks From the Perspective of a File System (NoSQL database©myNoSQL)