[kwlug-disc] Checking a USB disk for errors

Khalid Baheyeldin kb at 2bits.com
Fri May 16 09:08:04 EDT 2014


I thought smart tools do not with USB disks. No?


On Fri, May 16, 2014 at 5:40 AM, Charles M <chaslinux at gmail.com> wrote:

> To keep things simple at Computer Recycling we use gsmartcontrol
> (graphical front end to smartcontrol). It's nice because it puts in
> pink/red various kinds of errors drives have. The last tab has a short and
> extended test. Mind you this is when we're testing drives we haven't used
> before.
>
>
> On Thu, May 15, 2014 at 11:55 PM, William Park <opengeometry at yahoo.ca>wrote:
>
>> On Thu, May 15, 2014 at 10:54:31PM -0400, Khalid Baheyeldin wrote:
>> > On Thu, May 15, 2014 at 9:55 PM, Khalid Baheyeldin <kb at 2bits.com>
>> wrote:
>> >
>> > > The method I used is to connect the drive to the laptop, unmount the
>> NTFS
>> > > filesystem that is on it, and then do:
>> > >
>> > > time dd if=/dev/sdb bs=16mb of=/dev/null
>> > >
>> >
>> > It is finally done ...
>> >
>> > # time dd if=/dev/sdb bs=16000k of=/dev/null
>> > 61047+1 records in
>> > 61047+1 records out
>> > 1000204886016 bytes (1.0 TB) copied, 28626.2 s, 34.9 MB/s
>>
>> 34.9MB/s is pretty fast for USB2, but slow for USB3.  What I usually do
>> in this case is
>>     badblocks -b 4096 -c 4096 -sv ...
>>     badblocks -b 4096 -c 4096 -swv ...
>> where -w is for destructive read/write test.
>>
>> >
>> > real    477m6.269s
>> > user    0m0.296s
>> > sys     19m33.457s
>> >
>> > That is 7.95 hours ...
>> > --
>> > Khalid M. Baheyeldin
>> > 2bits.com, Inc.
>> > Fast Reliable Drupal
>> > Drupal optimization, development, customization and consulting.
>> > Simplicity is prerequisite for reliability. --  Edsger W.Dijkstra
>> > Simplicity is the ultimate sophistication. --   Leonardo da Vinci
>> > For every complex problem, there is an answer that is clear, simple, and
>> > wrong." -- H.L. Mencken
>>
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>>
>>
>>
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>
>
>
> --
> Charles McColm, Author: Instant XBMC,
> Columnist: Full Circle Magazine,
> Project Manager: The Working Centre Computer Recycling Project
> Web: http://www.theworkingcentre.org/cr/
> Blog: http://www.charlesmccolm.com/
> Twitter/Identica/Google+: @chaslinux
>
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>


-- 
Khalid M. Baheyeldin
2bits.com, Inc.
Fast Reliable Drupal
Drupal optimization, development, customization and consulting.
Simplicity is prerequisite for reliability. --  Edsger W.Dijkstra
Simplicity is the ultimate sophistication. --   Leonardo da Vinci
For every complex problem, there is an answer that is clear, simple, and
wrong." -- H.L. Mencken
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