- Decimal definition (adopted by HDD manufacturers):
1 TB = 1000 GB; 1 GB = 1000 MB; 1 MB = 1000 KB; 1 KB=1000 Bytes
Therefore, 1 TB = 10004 Bytes, and 1 GB = 10003 Bytes
- Binary definition (adopted by file systems):
1 TB = 1024 GB; 1 GB = 1024 MB; 1 MB = 1024 KB; 1 KB=1024 Bytes
Therefore, 1 TB = 10244 Bytes, and 1GB = 10243 Bytes
As a result, if you buy 2 hard drives labeled as 500 GB and 1 TB in storage capacity respectively, and install them on your Synology NAS, the actual sizes for each drive displayed on the Volume page will be as follows:
500 GB x 10003 / 10243 = 465 GB
1000 GB x 10003 / 10243 = 931 GB
To eject storage devices properly from EDS14, go to Control Panel > Devices and Printers to eject a specific device, or push the hardware SD/Disk Eject button to the side of your EDS14 to eject all connected devices at once. The storage LED indicator blinks when your device is being ejected and goes out when it has been successfully ejected.
Besides EXT4, external hard drives connecting to Synology NAS can also be formatted in FAT32. FAT32 supports up to 4GB for a single file. For more details about FAT32 format, please refer to http://en.wikipedia.org/wiki/FAT32.
Disk defragmenter is mainly used for FAT file systems. Because the speed of reading files will decrease after the FAT system has run for a period of time, it is necessary to run disk defragmenter to rearrange data to speed up/accelerate the speed of reading files.
It is not necessary to defragment the internal hard drive of the Synology Product because the Synology Product uses EXT4 file system, and it has made the best arrangement while assigning files.