Problem with External HDD (Disconnects with Sata connection, slow write speeds)

Shpati

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I use a HDD and External Enclosre combination:

ICY DOCK MB664US-1S 3.5" Pearl White SATA I/II/III USB2.0 & eSATA Screw-less External Enclosure

Western Digital WD Green WD20EARS 2TB 64MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive

Alright here are my 2 issues:

1) The HDD will automatically disconnect sometimes. It won't turn off, because I can still hear the HDD running, but the light on the Enclosure will shutoff. I am not sure what the problem is. I don't know if it is connected to a power problem (with the Enclosure), my laptop, my Sata cord, or the HDD itself.

2) Slow write speeds. When I am moving/copying big files to my HDD, it will start off really fast (90-60 MB/s) then it will slow does to about 25-35 MB/s. And this is with a Sata connection.

Some background:

- I am using a laptop. Both devices are connected to a surge protector.

- I use this HDD as a media device for my TV and it has not disconnected itself on the TV. It plays all my video files and audio files without a hiccup via USB 2.0.

- My Sata cord is bent in 2 places so it can fit in my computer desk better.

- It's been having these issues for a while (at least 2 years).

- Also, when I am putting things on the HDD, the enclosure light will turn off (i'm not sure if it is supposed to do that).

- It doesn't automatically disconnect in certain intervals, it could happen when I click on a file. It could happen when moving a big file to the HDD. I've been using it for a couple of hours now and it hasn't disconnected. Come to think of it, it seems like I a get a longer connection after it disconnects and I restart the drive and connect it again.

- I'm not ruling out that my laptop my be at fault. B/c as I said, it's been working good on my TV. And I remember my external hard drive would be working better after I do a factory restore on my laptop, then over time the disconnection issue will come back. And my laptop already writes slow to SDHC cards and USB drives.
 

Shpati

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Thanks. I did a quick test. And it says I passed.

Can you explain the "WRITE ZEROS" option for me?

It says: "This option can be used to erase operating systems and file systems. QUICK ERASE writes zeroes to the first and last 10% of a drive's sectors or the first and last 1 million sectors (whichever is smaller). FULL ERASE writes zeroes to the entire drive and may take hours to complete (depending on the drive size and system performance).".

But I am not sure what the fully means as I am brand new to this.

I was wondering if this can help me with another small issues I was having.

- One was I basically deleted a large file, but HDD disconnected right in the middle, I deleted the file but didn't get the extra space.

This utility says I have 34.7 GB of free space on my HDD out of 320 GB. and 376GB of space on my big HDD out of 2000GB. While my computer says 32GB and 351GB of free space respectively. But I think this is probably because Windows only recognizes a capacity of 281GB and 1.81TB opposed to the 320GB and 2TB reading of the WD Utility.

- The other one is another small concern. There's about 5-6 folders on this HDD with random letters that my computer doesn't recognize, but my TV does. It's not a big deal, but can get annoying sometimes when I have to go through them. (they are in the root directory). There's also a CHKDSK folder in there that my TV recognizes as well.
 
Writing zeros or low level formatting completely wipes out the data on your hard drive. The full erase writes zero value on all the sectors, thus no data can be recovered. The quick erase writes zeros only on part of the sectors, thus the data becomes unreadable. So if you plan to do it, you should back up your data. I personally would recommend you the full erase. After you have done that, you should partition and format your drive. This might solve your extra space issue.

The difference in capacity is caused by the different measurement standards that are often used.

Regarding your third question, I would advise you to adjust your hidden files settings and see whether this will sort your issue out. You can do this the following way: Go to Control Panel -> Folder Options-> View -> tick Show Hidden Files -> Apply

As the test passes, it is possible that the issue you are facing has something to do the the enclosure. Though, checking the cable might be a good idea.

How to write zeros: http://wdc.custhelp.com/app/answers/detail/a_id/1211
Capacity differences: http://wdc.custhelp.com/app/answers/detail/a_id/615

Hope this will help,
D_Know_WD
 

Shpati

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Thanks! Looks like I have no need for writing zeroes. A good thing I didn't test it out just for curiosity :).

I tried showing the hidden folders. I only see one hidden folder on through computer (which is a Microsoft Office recovery folder I believe). Not sure why my TV shows it and my computer doesn't. It's quite odd.
 

Shpati

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Thanks for all the help.

I think those are indeed operating system files that my TV recognizes. I will just leave them since they are causing no harm.


I was transferring via eSata though, not USB 2.0.