The Disk field specifies the maximum amount of disk space that the quota target can use. The value in this field represents a hard limit that cannot be exceeded.
#Quota Target type disk files
/export tree 75K
/export tree 75K
If it is not , the Disk field can appear incorrect in quota reports. This happens because the Disk field is always rounded up to the nearest multiple of 4 KB to match disk space limits, which are translated into 4-KB disk blocks.
In this case, a warning message is printed to the console when quotas are initialized.