tested new option in menu
but after restart in console show
WARNING: Web interface UTF-8 mode enabled. Carefully read documentation as bugs may arise.
vm.dirty_writeback_centisecs = 300
vm.dirty_background_ratio = 1
vm.dirty_ratio = 60
sh: 4: unknown operand
[ 332.767473] EXT4-fs (mmcblk0p7): error count since last fsck: 3
[ 332.767478] EXT4-fs (sda1): error count since last fsck: 20
[ 332.767488] EXT4-fs (sda1): initial error at time 1540207089: ext4_read_inode_bitmap:223
[ 332.767493] EXT4-fs (sda1): last error at time 1541871239: __ext4_get_inode_loc:4446: inode 4451: block 327
[ 332.796835] EXT4-fs (mmcblk0p7): initial error at time 1541871029: ext4_find_entry:1473: inode 22591
[ 332.805987] EXT4-fs (mmcblk0p7): last error at time 1543817598: ext4_validate_block_bitmap:384: inode 22591