[ale] HELP - Partition Misaligned message after cloning disk

[David Tomaschik]

Older drives were built with 512B sectors, so a sector starting at any 512B
boundary IS "properly aligned"... to that drive.  Newer spinning media
drives use 4kB, as discussed earlier, so your partitions should ideally be
aligned to a 4kB boundary (as well as files).  To add to the complexity, a
similar thing holds true for erase block sizes on SSDs, but those can be as
large as 4M.  Of course, aligning files to a 4M boundary is not as easily
done unless you want lots of wasted space... so it's a tradeoff in that
case.


On Thu, Jan 3, 2013 at 2:09 PM, Ron Frazier (ALE) <
atllinuxenthinfo at techstarship.com> wrote:

> Hi JD,
>
> Thanks for that info.  I did some more research.  I'll be sharing that in
> a thread with a different subject.  This might have worked if the original
> source drive had been properly aligned.
>
> Sincerely,
>
> Ron
>
>
> On 12/31/2012 5:54 PM, JD wrote:
>
>> I think you might have been better off using parted or gparted to clone
>> the
>> disks.  Those tools, on current distros, **know** how to align on 4K
>> sector HDDs.
>>
>> Your Windows performance will probably suffer too until you correct this
>> issue.
>>
>> Just backup the data to that backup drive, repartition and restore.  I'm
>> certain
>> you have great backups. ;)
>>
>>
>>
>> On 12/31/2012 05:15 PM, Ron Frazier (ALE) wrote:
>>
>>
>>> Hi all,
>>>
>>> HELP.  I cloned my 500 GB hdd which was threatening failure for my
>>> laptop to a
>>> new 750 GB hdd using Acronis True Image.  I told it to leave the
>>> partition sizes
>>> unchanged, so the extra space at the end of the drive is unallocated.
>>>
>>> I can now boot both Windows 7 and Ubuntu and they work fine.  However,
>>> Disk
>>> Utility in Ubuntu is giving an error message on each partition that says:
>>>
>>> WARNING: The partition is misaligned by xxxx bytes.  This may result in
>>> very
>>> poor performance.  Repartitioning is suggested.
>>>
>>> The number xxxx varies by partition, and all partitions are showing the
>>> problem,
>>> except for the unallocated space.  The following screen shots show each
>>> error.
>>>
>>> https://dl.dropbox.com/u/**9879631/123112-Screenshot-01.**png<https://dl.dropbox.com/u/9879631/123112-Screenshot-01.png>
>>> https://dl.dropbox.com/u/**9879631/123112-Screenshot-02.**png<https://dl.dropbox.com/u/9879631/123112-Screenshot-02.png>
>>> https://dl.dropbox.com/u/**9879631/123112-Screenshot-03.**png<https://dl.dropbox.com/u/9879631/123112-Screenshot-03.png>
>>> https://dl.dropbox.com/u/**9879631/123112-Screenshot-04.**png<https://dl.dropbox.com/u/9879631/123112-Screenshot-04.png>
>>>
>>> Windows 7 seems to run fine and is apparently not bothered, although
>>> there may
>>> be hidden effects I cannot see.  What are the implications of this?  How
>>> do I
>>> fix it?  Note that I don't want to erase any data in any of the
>>> partitions.  The
>>> disk is formatted as MBR.
>>>
>>> The following scree
>>>
>>>
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>
> --
>
> (To whom it may concern.  My email address has changed.  Replying to former
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>
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>
> Ron Frazier
> 770-205-9422 (O)   Leave a message.
> linuxdude AT techstarship.com
>
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-- 
David Tomaschik
OpenPGP: 0x5DEA789B
http://systemoverlord.com
david at systemoverlord.com
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