Re: ddrescue - disk 2 disk (ntfs)

[Antonio Diaz Diaz]

Radomir Tomis wrote:
> OTOH, talking about mapfile emergency save, I experienced (same recovery
> session few days ago) the following problem with mapfile:
>
> ddrescue ...
> Timeout expired
>
> ddrescue [exactly the same parameters, immediately after "Timeout expired"]
> ddrescue: error in mapfile 'ddrescue.log', line 4736.
>
> awk 'NR>= 4733&&  NR<= 4738 {print NR,$0} {next}'  ddrescue.log | cat -evt
> 4733 0x59A9320200  0x08FAFC00  /$
> 4734 0x59B22CFE00  0x00000200  -$
> 4735 0x59B22D0000  0x0BF90000  +$
> 4736 0x59BE260000  0x000000xCF87050000  0x00980000  ?$
> 4737 0xCF879D0000  0x00020000  *$
> 4738 0xCF879F0000  0x01310000  ?$
>
> Like some problem for ddrescue to write out the mapfile completely/correctly.
> The free space on the drive holding the mapfile was only ~44 kB (copying 1
> TB *disk device* to 1 TB *file system*, you know ...), the mapfile itself
> was ~134 kB.
> But there was no "Error writing mapfile 'mapfile': No space left on device"

Thank you for reporting this.

I have no idea what can be the cause of the problem that you describe (a 
hole in the middle of the mapfile). Ddrescue writes the mapfile calling 
'fprintf' in a loop, once per line, and checks the return value of 'fclose'. 
All I can do is making ddrescue also check the return value of each 
'fprintf' in case the problem is a temporary failure of 'fprintf' that is 
not signaled at closing time.


Best regards,
Antonio.