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Author Topic: defragment network drives for d-link 323?  (Read 19265 times)

blizzak

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  • Posts: 3
Re: defragment network drives for d-link 323?
« Reply #15 on: October 16, 2010, 08:58:06 AM »
I'm convinced that my 323 is fragmented to all hell.  Files that have been on it for a long time transfer really fast over the network (30 MB/s read) whereas newer files put on there when I had the least free space (20 GB free out of 1 TB) go like 8-9 MB/s.  There really can't be any other explanation for it.  I'll be testing some defrag utilities very soon.
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gunrunnerjohn

  • Level 11 Member
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  • Posts: 2717
Re: defragment network drives for d-link 323?
« Reply #16 on: October 16, 2010, 09:08:41 AM »
Please post your results, I'm curious as to what you find. :)
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Microsoft MVP - Windows Desktop Experience
Remember: Data you don't have two copies of is data you don't care about!
PS: RAID of any level is NOT a second copy.

blizzak

  • Level 1 Member
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  • Posts: 3
Re: defragment network drives for d-link 323?
« Reply #17 on: October 16, 2010, 09:09:42 AM »
Heh, you get what you ask for.  Don't have much time now, but I did run that fragfile tool on a 3 GB file that was transferring slow for me.  Here was the result:

200519 extents found, perfection would be 25 extents.

That file only transfers at like 8-9 MB/s.  Now, here's an 700 MB iso that transfers at 25-30 MB/s:

15 extents found, perfection would be 6 extents.

So I think it just might be possible that fragmentation is an issue on the DNS-323, and will affect transfer speeds.
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gunrunnerjohn

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  • Posts: 2717
Re: defragment network drives for d-link 323?
« Reply #18 on: October 16, 2010, 09:16:49 AM »
We had a lively discussion about fragmentation on EXT2/EXT3 filesystems here a couple of months ago, some are convinced that Linux filesystems need no defrag.  I pointed out that a defrag was planned for EXT4, so it seems that someone feels it is. :D

Those results are interesting, but I wonder how you defrag that in the box?
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Microsoft MVP - Windows Desktop Experience
Remember: Data you don't have two copies of is data you don't care about!
PS: RAID of any level is NOT a second copy.

blizzak

  • Level 1 Member
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  • Posts: 3
Re: defragment network drives for d-link 323?
« Reply #19 on: October 17, 2010, 09:57:20 AM »
Yeah, there are tools for defragging, but I don't think that the drives can be mounted while you do that.  Seems like more of a pain than anything.  One thing I wonder if it would work (I'm using RAID1) is pulling out a drive, formatting it, sticking it back in and turning it on and allowing the array to rebuild.  Then pulling out the other drive and doing the same thing.  Would the files be copied over in a linear fashion, or does it do it like 1:1? (which would make the rebuilt drive have the same fragmentation as the good drive).

Either way, I'm copying a bunch of data off and probably gonna format and copy it back.  But not sure yet...
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