Do Partitions slow Read/Write speeds?

Kush Jain

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May 7, 2014
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Hi,

I have an SSD[Only 64GB]:kikou: and an HDD. I have installed the programs and operating system on the SSD. I have three partitions for my HDD [image included], First for games, Second for storage and the last for windows downloads and documents. http://i.imgur.com/OGK82ZK.png

For bigger games >50gb, i install them on my HDD. It's a WD Blue 1TB 7200RPM hard drive

I was moving some files from partition to partition, and the speeds were 40MB/s. So, i was wondering why are they so slow??

 
Solution
Hi there Kush Jain,

Sorry that you are facing some issues with your WD Blue drive. 🙁
Even though it is possible that partitions slow transfer speed, you can try several things.
Have you ever defragmented the drive? If not, you can do so. Highly fragmented data could lead to slow transfer rates.
Are you trying to transfer one big file or many small ones? It may be a good idea to try transferring one big file.

Also, as there may be something wrong with the drive itself, you can test it with WD's Data Lifeguard Diagnostic tool in order to check that out. In case the results show that there is something wrong with the drive, you need to back up the data stored on it as soon as possible.
If the results show that the drive is fine, then...
Hi there Kush Jain,

Sorry that you are facing some issues with your WD Blue drive. 🙁
Even though it is possible that partitions slow transfer speed, you can try several things.
Have you ever defragmented the drive? If not, you can do so. Highly fragmented data could lead to slow transfer rates.
Are you trying to transfer one big file or many small ones? It may be a good idea to try transferring one big file.

Also, as there may be something wrong with the drive itself, you can test it with WD's Data Lifeguard Diagnostic tool in order to check that out. In case the results show that there is something wrong with the drive, you need to back up the data stored on it as soon as possible.
If the results show that the drive is fine, then you can consider managing your partitions(merging, for example). And again, backing up the data is advisable before doing that. :)

WD's DLG tool: http://products.wdc.com/support/kb.ashx?id=FbFT19

Let me know how this goes,
D_Know_WD
 
Solution
The partitions themselves don't slow them down any more than the physical limits on the disk. What I mean by that is if you have say, 3 partitions of equal size that span the entire disk and you are transferring to another disk. The first partition will read/write the fastest (reading from outer edge), second partition somewhere in between and the last partition will be slowest as it is reading from the area nearest the center of the disk (for simplicity's sake lets assume it is a single platter disk).

The issue you are experiencing is because you are reading/writing to the same disk. It has to read some data, move the head and write it over and over. It is faster to read data than to write it so you get some speed loss there. 40 MB/s seems about right for that type of operation.