Slow disk I/O - was Re: Seeking Help

[geoff at thebakershome.net]

> On 01/22/2013 06:09 AM, geoff at thebakershome.net wrote:
>>> On 22 January 2013 13:34,  <geoff at thebakershome.net> wrote:
>>>>
>>>>
>>>>> On 22 January 2013 13:13,  <geoff at thebakershome.net> wrote:
> ...
>>>> Anytime I am performing a task with high I/O to one of the HDDs. There
>>>> are
>>>> three in the computer. The SDD, and two Western Digital platter
>>>> drives.
>>>
>>> So actually you think it is disk I/O speed that is the problem, rather
>>> than being anything to do with installing/upgrading?
>>>
>>> If you just copy a large file is it slow?
>>> Have a look in /var/log/syslog and see if there is anything that looks
>>> like an error.
>>>
>>> Colin
>>
>> Yes that is it exactly, this is why my request was to find someone with
>> the same motherboard rather than ask for help with upgrade/install.
>>
>> I have been monitoring syslog and have not found anything obvious. There
>> are warnings about ACHI which may be relevant. Unfortunately I am at
>> work
>> now so I cannot get the warnings off the computer. Will update later
>> today.
>>
>> I have a thread on ubuntuforums where I have been getting advice but
>> thought searching for someone with the same motherboard would help me
>> diagnose the problem. I do not want to spam this list, instead if you
>> search for "thisismyusername4now ubuntuforums" my thread title is "New
>> Install - Very slow at "Reading package lists..." in apt-get".
>>
>> Thanks
>> -Geoff
> ...
>
> These might be of help:
>
> <https://wiki.ubuntu.com/DebuggingProcedures>
>   <https://wiki.ubuntu.com/DebuggingInstallationIssues>
> <http://manpages.ubuntu.com/manpages/precise/man8/iotop.8.html>
> <http://manpages.ubuntu.com/manpages/precise/man1/atop.1.html>
> <https://duckduckgo.com/?q=ubuntu+%2B+slow+disk+i%2Fo>
> <https://launchpad.net/+search?field.text=slow+disk+i%2Fo&field.actions.search=Search>
> <https://launchpad.net/+search?field.text=apt-get+update+slow&field.actions.search=Search>
>
> For the last, you might try a different update source location: e.g.
> http://us.archive.ubuntu.com/ubuntu/. Install synaptic (sudo apt-get
> install synaptic), open and then:
> Settings|Repositories|Ubuntu Software|Download from: Other|Select best
> server. Somtimes that works, sometimes not (for example it's telling me
> that the best links for me from California are all in New Zealand), but
> at least it gives you something you can experiment with. After selecting
> the server, go back to the main synaptic page & click 'Reload'. See if
> it's better. If so, close out synaptic & try from the terminal.
>
> I suggest that you also use http://pastebin.ubuntu.com/ to post some
> specifics regarding your system so that folks know what they are dealing
> with (sudo lshw, sudo fdisk -l, cat /etc/apt/sources.list, uname -a
> etc). Paste info there & then provide the list with the url to the paste.
>

Thank-you for the suggestion of data collection. I have created a past bin
for all the data. I do see that the drives come up as UDMA 133, not sure
how to interpret that.

Also I see a GUID partition table with an error. Again not sure what to
make of this, but it is on a platter drive. I have pulled the platter
drives and booted with only the SSD, but the problem persists.

Pastebin: http://pastebin.ubuntu.com/1561660/


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