# Disk Quota Policy

To prevent storage misuse and problems resulting from filesystems becoming full, INCD has implemented the following data usage policies and limits.

|File system | Hard Limit Exceeded | 
|--- |--- | 
|**/home**| Once quota or number of files exceeded, new files will not be allowed. No automatic warning implemented. **This may lead to login problems**.
|**/data/unixgrp**| Once quota or number of files exceeded, new files will not be allowed and all jobs will fail. **No automatic checks implement** and users are allowed to submit jobs and run then even no quota available.  | 

*  There are two conventions for defining digital storage capacities, namely, base 2 (1KB = 1024 bytes) and base 10 (1KB = 1000 bytes), and both are in common use. At INCD we follow Base 2, the following definitions are used when referring to digital storage capacities (filesystem quota limits, usage, etc.):

| Convertion Table | --| --  | 
|--- | --- | ---| 
| 1 KiloByte (KB) | 2 ^ 10 |  1024 bytes |
| 1 MegaByte (MB) | 2 ^ 20 | 1048576 bytes |
| 1 GigaByte (GB) | 2 ^ 30 | 1073741824 bytes |
| 1 TeraByte (TB) | 2 ^ 40 | 1099511627776 bytes
| 1 PetaByte (PB) | 2 ^ 50 | 1125899906842624 byte

* To know more about quota usage and filesystem please see the [__directories and filesystems section__](https://wiki.incd.pt/books/filesystem-user-guide/page/directories-and-filesystems)

> **__NOTE__** Users should check in advance if they have enough quota for their jobs since this may lead to job failures and loss of CPU hours pledged to them.