I agree with this.
If file allocation table is damaged, it's very hard to recover anything. If the error occurred while re-organising and re-writing blocks of files (individual files can be scattered all over the memory/disk), it would still be a problem. A specialist firm might be able to recover files (at a price), but to all intents and purposes, I would say that the data is lost.
Adrian Thomas
On Feb 7 2014, Mark Fontana wrote:
>
>
>Yes, doesn't look too good. If it were a floppy, it would be easy for
>the customer to send the media out for data recovery. But a memory disk
>is basically a flash chip on one of the circuit boards. Unless the chip
>is socketed, the whole board would need to be removed to attempt recovery.
>
>In any case, the chances of recovery are also much slimmer, because at
>the hardware level, flash memory is organized into fairly large blocks
>(each potentially containing multiple songs, if the songs are small).
>If any of the content of a block changes, the entire block must be
>erased and then rewritten from a temporary copy held in memory.
>Interrupting this process means the flash memory could be left with some
>erased or partially-written blocks, corrupting the filesystem and
>resulting in the loss of multiple songs.
>
>Diskettes, in contrast, are organized into sectors and clusters that are
>typically much smaller than flash blocks, so the amount of data at risk
>during a write is smaller too.
>
>If the memory disk in the DKC55RCD is in fact some kind of removable
>device or socketed part, I might be able to help.
>
>Mark Fontana
>
>
>
>On 02/07/2014 12:01 PM, Spencer Chase wrote:
>>
>> ohhhh! that could be a real mess if it is onboard. i doubt that Yamaha
>> has any tools for recovering. getting the specs for the memory chip,
>> reading it page by page and reconstructing the files would be a major
>> project.
>>
>> On 2/7/2014 9:31 AM, Bill Brandom wrote:
>>> Hi Spencer,
>>>
>>> The DKC55RCD has 16 MB of flash memory.
>>>
>>> Bill
>>>
>>> On Feb 7, 2014, at 9:01 AM, Spencer Chase
>>> > wrote:
>>>
>>> hard to imagine an OS that could be so badly written as to scramble
>>> the disc directory but this could have happened? personally, i would
>>> remove the drive and try to read it in computer. data recovery is
>>> usually possible even if the directory is missing or scrambled.
>>> having it recovered professionally is expensive but there are
>>> programs that you can buy to do it yourself.
>>>
>>> On 2/7/2014 8:26 AM, Bill Brandom wrote:
>>>> Hi Herb,
>>>>
>>>> Can he access the memory disks? If so, all music is gone from each
>>>> of the 16 memory disks?
>>>>
>>>> Bill
>>>>
>>>> On Feb 7, 2014, at 4:00 AM,
>>>> > wrote:
>>>>
>>>> Greetings to the group from Connecticut. My name is Herb Lindahl and
>>>> I have been in the Piano Tuning and Restoration business for 30
>>>> years. I have a client here in CT with a Disklavier with the
>>>> DKC55rcd Control unit. He has owned it about ten years. He has made
>>>> many recordings of himself playing over the years. Recently, his
>>>> young daughter was recording herself playing, and while the song was
>>>> saving to a memory disk, she, by accident shut the unit off. Now my
>>>> client cannot access any of the music he had stored on the unit. Is
>>>> there a way to restore his music, or could it all be lost ?
>>>>
>>>>
>>>> Thank you in advance,
>>>>
>>>> Herb Lindahl
>>>> 860-644-9407
>>>
>