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HDD, FS, O_SYNC : Throughput vs. Integrity

, 16 Sep 2012
Filesystems, block-devices, throughput and data-integrity. Why O_SYNC on a filesystem does NOT guarantee a write to the HDD and why Raw-I/O over BLOCK devices DOES guarantee a write to disk.
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About the Author

TheCodeArtist
Software Developer (Senior) Nvidia Corporation
India India
Chinmay V S (a.k.a TheCodeArtist) is a Senior software engineer at NVIDIA Corporation - India. With more than 4 Years of hands-on experience in Linux Kernel and Android BSP development, he has been actively involved in developing and integrating drivers for the Linux-kernel and hardware abstraction layers for OMAP4 based Android smartphones, automotive navigation and infotainment devices.
 
In his spare time, he can be seen lurking in the shadows on StackOverflow and various Linux kernel mailing-lists. He enjoys sharing his experiences with technology as TheCodeArtist on his blog.
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