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[Discuss] Why are all my hard drives slow on Ubuntu? (new computer)

The dmesg output turned out to not help too much, it just became clear 
that these were two very different kernels.

However, there is one kernel option that Knoppix is using that you might 
try to add to the Ubuntu build:

You can get a little more information on this here:

Basically, if you've got SSD drives and it gets in the 1.5Gb mode (which 
it is), you can have serious problems.

Also, I concur with others on the list that you really should be using a 
64-bit kernel.


On 08/29/2013 09:39 PM, Daniel Barrett wrote:
> On August 29, 2013, Matthew Gillen wrote:
>> Can you
>>    cat /proc/cmdline
>> and post the results?  (feel free to scrub any UUID-looking things...
> Ubuntu 12.04:
>    BOOT_IMAGE=/boot/vmlinuz-3.5.0-37-generic root=UUID=... ro quiet splash vt.handoff=7
> Knoppix 7.2:
>    lang=en apm=power-off initrd=minirt.gz nomce libata.force=noncq hpsa.hpsa_allow_any=1 loglevel=1 BOOT_IMAGE=linux
>> If you're booting into knoppix anyway, might as well also post the dmesg
>> output from knoppix so that we can compare the two.
> The dmesg output can now be compared at:
> - Ubuntu:
> - Knoppix:
> Thank you for your help so far.
> --
> Dan Barrett
> dbarrett at

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