A 4K hard disk drive is a storage device with sectors 4096 bytes (i.e. Again, it results in heavy fragmentation when very large files are written to the hard disk, because they will be scattered in pieces of 512 bytes each all over different tracks of the disk.Īctually, 4K drives were developed to tackle this issue. Also, it means that such disk needs more space for data because every 512 bytes would be followed by a special bit between sectors containing the ECC bit. This way, for every 512 bytes one bit of ECC is created to inform the operating system that the data was written properly. The main downside about 512-bytes HDDs is that they have to check every 512 bytes for availability of the error correction code. Evidently, quite a lot of space seems to be wasted. The more capacity a hard disk drive has, the more sectors it contains, and therefore, it has more gaps. Looking at this picture, you may guess there is a plenty of space between the sectors with the conventional 512 bytes size.
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