JFS
File format
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Journaled File System is a 64-bit journaling file system created by IBM. There are versions for AIX, OS/2, eComStation, ArcaOS and Linux operating systems. The latter is available as free software under the terms of the GNU General Public License.... Wikipedia
Allowed filename characters: Any Unicode except NUL
Date resolution: 1 ns
Directory contents: B+ tree
File allocation: Bitmap/extents
File system permissions: Unix permissions, ACLs
Max file size: 4 × 250 bytes (4 PiB)
Max filename length: 255 bytes