October 2017
Intermediate to advanced
354 pages
9h 28m
English
Content preview from Mastering Linux Kernel Development
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Ext2
The Ext2 filesystem was first introduced in kernel version 0.99.7 (1993). It retains the core design of classic UFS (Unix filesystem) with write-back caching, which enables short turnaround time and improved performance. Although it was implemented to support disk volumes in the range of 2 TB to 32 TB and file sizes in the range of 16 GB to 2 TB, its usage was restricted for up to 4 TB disk volumes and 2 GB max file sizes due to block device and application imposed restrictions in 2.4 kernels. It also includes support for ACLs, file memory maps, and crash recovery through the consistency checker tool fsck. Ext2 divides physical disk sectors into fixed-size block groups. A filesystem layout is constructed for each block group, with each ...
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