If you google

site:discussions.apple.com "I/o error encoder error" "os x" mail

you will find lots of reports of this.  It seems to be associated in most cases 
with either Mail or mds.

On Oct 22, 2012, at 2:59 PM, Daniel Israel wrote:

> no "disk i/o error", but lots of "I/O error : encoder error"  from mail and 
> mdworker in particular.
> 
> 
> 
> On Oct 22, 2012, at 10:13 AM, Macs R We wrote:
> 
>> Yes, that is a common failure mode.  Check the Console logs for reports of 
>> "disk i/o error" around the times of the hangs.
>> 
>> On Oct 22, 2012, at 9:19 AM, Daniel Israel wrote:
>> 
>>> Since I sent this, things were running fine, but suddenly yesterday it 
>>> locked up again.  And then did it about 6 times in a row after forced 
>>> rebloot.  That seems to be the pattern....  Once it happens, it happens 
>>> several times in a row, then not for a while.
>>> 
>>> Is it possible that it might have to do with overheating?
>>> 
>>> 
>>> On Oct 12, 2012, at 6:06 PM, Daniel Israel wrote:
>>> 
>>>> I did run the Verify in Disk Utility which reported no errors
>>>> 
>>>> On Oct 12, 2012, at 5:51 PM, Macs R We wrote:
>>>> 
>>>>> If you want reliable info, call the SSD manufacturer.
>>>>> 
>>>>> Have you run a tool like DiskWarrior over your file system first?
>>>>> 
>>>>> On Oct 12, 2012, at 4:40 PM, Daniel Israel wrote:
>>>>> 
>>>>>> 
>>>>>> Hi All,
>>>>>> 
>>>>>> I've got a mid-2010 Macbook Pro (MacbookPro6,1) 17 inch with 512G SSD.
>>>>>> 
>>>>>> Been working like a champ for almost 2 years.  A couple weeks ago, Apple 
>>>>>> pushed the 10.7.5 update.  Since then, not so great. Intermittently, an 
>>>>>> application will freeze with the spinning cursor.  Going to other apps 
>>>>>> will cause them to freeze, and if I go to the system menu (like to Force 
>>>>>> Quit or Rebloot) everything freezes and I'm forced to physically shut it 
>>>>>> down and boot back up.  I haven't found a way around it.  It's not 
>>>>>> predictable.  It's happened with Dreamweaver, Eclipse, Photoshop, and 
>>>>>> recently with Mail.  Some net searching has found a few people with same 
>>>>>> issues.  I did find where someone suggested it was an SSD issue and I 
>>>>>> should upgrade firmware.  A net search hasn't brought me to any 
>>>>>> instructions HOW to do this.  (As an aside, I notice that google is 
>>>>>> becoming more and more useless over time)
>>>>>> 
>>>>>> Any help on somewhere I can get instructions on checking and/or 
>>>>>> upgrading the firmware for my SSD?  (Or failing that, downgrading back 
>>>>>> to 10.7.4?)
>>>>>> 
>>>>>> Thanks!
>>>>>> 
>>>>>> -D. Israel
>>>>>> [email protected]
>>>>>> http://www.customcodebydan.com
>>>>>> AIM: JudoDanIzz
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> _______________________________________________
>>>>>> MacOSX-talk mailing list
>>>>>> [email protected]
>>>>>> http://www.omnigroup.com/mailman/listinfo/macosx-talk
>>>>> 
>>>>> -- 
>>>>> Macs R We -- Personal Macintosh Service and Support
>>>>> in the Wickenburg and far Northwest Valley Areas.
>>>>>                         http://macsrwe.com
>>>>> 
>>>> 
>>>> -D. Israel
>>>> [email protected]
>>>> http://www.customcodebydan.com
>>>> AIM: JudoDanIzz
>>>> 
>>>> 
>>>> 
>>>> _______________________________________________
>>>> MacOSX-talk mailing list
>>>> [email protected]
>>>> http://www.omnigroup.com/mailman/listinfo/macosx-talk
>>> 
>>> -D. Israel
>>> [email protected]
>>> http://www.customcodebydan.com
>>> AIM: JudoDanIzz
>>> 
>>> 
>>> 
>> 
>> -- 
>> Macs R We -- Personal Macintosh Service and Support
>>   in the Wickenburg and far Northwest Valley Areas.
>>                           http://macsrwe.com
>> 
> 
> -D. Israel
> [email protected]
> http://www.customcodebydan.com
> AIM: JudoDanIzz
> 
> 
> 

-- 
  Macs R We -- Personal Macintosh Service and Support
    in the Wickenburg and far Northwest Valley Areas.
                            http://macsrwe.com

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