mirror of https://github.com/vitalif/e2fsprogs
65c6c3e06f
In practice, it is **extremely** rare for users to try to use more than the first backup superblock located at the beginning of block group #1. (i.e., at block number 32768 for file systems with a 4k block size). This new compat feature restricts the backup superblock to block group #1 and the last block group in the file system. Aside from reducing the overhead of the file system by a small number of blocks, by eliminating the rest of the backup superblocks, it allows us to have a much more flexible metadata layout. For example, we can force all of the allocation bitmaps and inode table blocks to the beginning of the disk, which allows most of the disk to be exclusively used for contiguous data blocks. This simplifies taking advantage of certain HDD specific features, such as Shingled Magnetic Recording (aka Shingled Drives), and the TCG's OPAL Storage Specification where having a simple mapping between LBA block ranges and the data blocks used by the file system can make life much simpler. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> |
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| .. | ||
| Makefile.in | ||
| debug_cmds.ct | ||
| debugfs.8.in | ||
| debugfs.c | ||
| debugfs.h | ||
| dump.c | ||
| extent_cmds.ct | ||
| extent_inode.c | ||
| filefrag.c | ||
| htree.c | ||
| icheck.c | ||
| jfs_user.h | ||
| logdump.c | ||
| ls.c | ||
| lsdel.c | ||
| ncheck.c | ||
| ro_debug_cmds.ct | ||
| set_fields.c | ||
| unused.c | ||
| util.c | ||
| zap.c | ||