ZLIB compression support
configname: CONFIG_UBIFS_FS_ZLIB
Linux Kernel Configuration
└─>File systems
└─>Miscellaneous filesystems
└─>ZLIB compression support
In linux kernel since version 2.6.27 (release Date: 2008-10-09)
Zlib compresses better than LZO but it is slower. Say 'Y' if unsure.