Re: [Bug-ddrescue] Question about "No space left on device" message

[Tom Williams]

On 11/30/2014 10:38 AM, Robert Trevellyan wrote:
> Disk /dev/sdg: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors
> Disk /dev/sdh: 1.8 TiB, 2000365289472 bytes, 3906963456 sectors
>
> Your destination disk is smaller than your source disk.
>
> Robert Trevellyan
> www.trevellyan.biz
> 518 392 0846

Well, don't I feel like an idiot!  :)   Thanks for pointing this out.  I
got so wrapped up in the 2TB size, I didn't pay close enough attention
to the details of the drive sizes.

Thanks!

Peace...

Tom

>
> On Sun, Nov 30, 2014 at 1:31 PM, Tom Williams <address@hidden> wrote:
>
>> I'm using ddrescue 1.17 on Ubuntu 14.10 Linux (64-bit) to copy data from
>> one external 2TB hard drive to another 2TB external hard drive.  Both
>> drives are connected to my system via USB ports.   I let ddrescue run
>> for 6 days before it finally stopped with the following message:
>>
>> ddrescue: write error: No space left on device
>>
>> Here is the command I issued:
>>
>> address@hidden:~$ sudo ddrescue -r3 /dev/sdg /dev/sdh
>> ddrescue: Output file exists and is not a regular file.
>> ddrescue: Use '--force' if you really want to overwrite it, but be
>>           aware that all existing data in the output file will be lost.
>> Try 'ddrescue --help' for more information.
>> address@hidden:~$ sudo ddrescue -r3 /dev/sdg /dev/sdh --force
>>
>>
>> GNU ddrescue 1.17
>> Press Ctrl-C to interrupt
>> rescued:     1646 GB,  errsize:    354 GB,  current rate:     720 kB/s
>>    ipos:     2000 GB,   errors:    9726,    average rate:    4289 kB/s
>>    opos:     2000 GB,    time since last successful read:       0 s
>> Copying non-tried blocks...
>> ddrescue: write error: No space left on device
>> address@hidden:~$
>>
>> /dev/sdg is the original hard drive and /dev/sdh is the new, empty hard
>> drive.   Both hard drives are 2TB in size:
>>
>> Disk /dev/sdg: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors
>> Units: sectors of 1 * 512 = 512 bytes
>> Sector size (logical/physical): 512 bytes / 512 bytes
>> I/O size (minimum/optimal): 512 bytes / 512 bytes
>> Disklabel type: gpt
>> Disk identifier: F2423982-AD62-4A91-9305-7E8444C65BDB
>>
>> Device      Start        End    Sectors  Size Type
>> /dev/sdg1      40     409639     409600  200M EFI System
>> /dev/sdg2  409640 3906766983 3906357344  1.8T Apple HFS/HFS+
>>
>> GPT PMBR size mismatch (3906963448 != 3906963455) will be corrected by
>> w(rite).
>>
>> Disk /dev/sdh: 1.8 TiB, 2000365289472 bytes, 3906963456 sectors
>> Units: sectors of 1 * 512 = 512 bytes
>> Sector size (logical/physical): 512 bytes / 512 bytes
>> I/O size (minimum/optimal): 512 bytes / 512 bytes
>> Disklabel type: gpt
>> Disk identifier: A58EACF6-DE44-43F8-9150-47FA3842849B
>>
>> Device      Start        End    Sectors  Size Type
>> /dev/sdh1      40     409639     409600  200M EFI System
>> /dev/sdh2  409640 3906701271 3906291632  1.8T Apple HFS/HFS+
>>
>> The new hard drive, /dev/sdh, is a Western Digital "My Passport for Mac"
>> 2TB external hard drive.
>>
>> I did some web searches on the "write error: No space left on device"
>> message I received and didn't find anything relating to what I'm
>> experiencing. I did find some discussion about the logfile encountering
>> a space issue, but I'm not using a logfile (no particular reason why I
>> didn't).
>>
>>
>> When I try to mount the new drive, it doesn't mount and I get these
>> errors in dmesg output:
>>
>> [406070.521186] hfsplus: invalid secondary volume header
>> [406070.521193] hfsplus: unable to find HFS+ superblock
>> [406080.059713] hfsplus: invalid secondary volume header
>> [406080.059719] hfsplus: unable to find HFS+ superblock
>>
>> Now, while ddrescue was running, periodically I would hear loud
>> clicking, more like "clacking," sounds from the original hard drive.
>> Apparently, the drive was dropped and the owner was concerned about
>> losing photos.  That's why I suggested getting the data off the original
>> hard drive NOW, while the data is still accessible.
>>
>> Any ideas why I received the "write error:  Np space left on device"
>> message when both drives are the same size, 2TB?
>>
>> Thanks!
>>
>> Peace...
>>
>> Tom
>>
>> --
>> /When we dance, you have a way with me,
>> Stay with me... Sway with me.../
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>>
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-- 
/When we dance, you have a way with me,
Stay with me... Sway with me.../