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Old 11-28-2015, 01:42 PM   #16
Budalas
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@pan64
I have one external HD with arch. And computer i am booting it on has windows on its internal HD.

When i tried to figure out what was the problem I installed different os (debian - but only to see if it would have the same problem and it did, then i went back to arch) i also tried another usb3 HD to see if it was something wrong with the first one and after the same results i formated that drive. So now i have one HD with arch.
 
Old 11-28-2015, 02:35 PM   #17
pan64
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and how are they connected to each other?
 
Old 11-28-2015, 05:19 PM   #18
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I don't think they are. Ondoho asked me what os is on the computers internal HD but i don't know why he wanted to know that.
 
Old 11-30-2015, 03:17 AM   #19
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Sorry, I think you misunderstood my last question. How your windows box tries to use that external HDD (with arch). How are they connected? over lan/usb/??? Where did you try to install debian?
 
Old 11-30-2015, 08:18 AM   #20
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They are connected through usb3. I installed debian on the same HD that has arch now (to sea if this is an arch problem. But debian had the same problem so i reinstalled arch.)
 
Old 11-30-2015, 08:29 AM   #21
pan64
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And are you sure about the usb3 support on both ends? (on windows and on the other side too?) Are you sure the hardware of that external hard disk can support that speed at all?
 
Old 11-30-2015, 08:31 AM   #22
Budalas
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Yes both are usb3.
 
Old 11-30-2015, 08:49 AM   #23
pan64
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that is not so simple. you need drivers to be able to use them on full speed and also the box should be able to read/write hdd with the same or better speed. So for example it depends on the i/o speed of that hdd this could be the bottleneck.
 
Old 11-30-2015, 08:59 AM   #24
Budalas
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sudo hdparm -Tt /dev/sdb:
Code:
/dev/sdb:
 Timing cached reads:   3954 MB in  2.00 seconds = 1977.47 MB/sec
 Timing buffered disk reads: 326 MB in  3.02 seconds = 108.05 MB/sec
Does that help. Is there something else i could do to help you?
 
Old 12-01-2015, 02:55 AM   #25
pan64
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I don't think I need your help.
You measured the buffered/cached read/write, but I think that is not what we need. Actually you need to measure all parts and catch the bottleneck (probably a damaged usb cable can do that too).
 
Old 12-01-2015, 05:01 PM   #26
Budalas
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How should i measure that, only thing i could find is gnome-disks will that work?

And i didn't mean you need my help i wanted to say what else can i do to "help you" figure out my problem - what information you need to help me.
 
Old 12-02-2015, 01:44 AM   #27
pan64
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ok, fine.
put a 10G or even bigger file onto that drive and execute a simple time cat file >/dev/null (locally and remotely). You will get some info about the speed of reading. Also you can try to send something "over the line" without using that hdd (or any) just to check the speed of that connection. Probably you will be able to find some tools to do the job for you.
 
  


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