Re: [Bug-ddrescue] Help rescuing my 500GB disk

[Andrej Trobentar]

On 11/12/2013 04:53 PM, Florian Sedivy wrote:

Hi Andrej!

Hi Florian!

Let me just ask, why you always use option -A (—try-again)? 

Well, I have read in the manual, that if the drive stops responding I should use the -A option :\ But as I can see now I haven't read the whole sentence right *facepalm* :

" Try this if the drive stops responding AND ddrescue immediately starts splitting failed blocks when restarted."

I would only use that on a single run under very special circumstances, and almost always while still using -n (—no-split). If it is useful in your case depends a lot of what exactly happens, when your drive becomes unresponsive. Option -A might be necessary, but could also be harmful, by forcing ddrescue to repeat trying known bad areas instead of moving on to the untried rest of the disk.

When my driver becomes unresponsive the Activity light on the converter stops blinking an I get this in my messages log :

"usb 5-1: reset full-speed USB device number 47 using ohci_hcd
 usb 5-1: Parent hub missing LPM exit latency info.  Power management will be impacted.
 usb 5-1: reset full-speed USB device number 47 using ohci_hcd
 usb 5-1: Parent hub missing LPM exit latency info.  Power management will be impacted.
 usb 5-1: reset full-speed USB device number 47 using ohci_hcd
 usb 5-1: Parent hub missing LPM exit latency info.  Power management will be impacted.
..."

Then ddrescue just stops with :

"....
current status
rescued:    45762 MB,  errsize:   1356 MB,  current rate:        0 B/s
   ipos:    56647 MB,   errors:    1888,    average rate:    91311 B/s
   opos:    56647 MB,     time since last successful read:     1.5 h
Copying non-tried blocks...
ddrescue: input file disappeared: No such file or directory
address@hidden ~]#"


I have now omitted the -A option and now I'm only using :
"ddrescue -m /tmp/domain_logfile -v /dev/sdb1 /tmp/Image.img /tmp/Image.log"

or

"ddrescue -m /tmp/domain_logfile -v -R /dev/sdb1 /tmp/Image.img /tmp/Image.log"


Here's my status so far :

"ddrescuelog -t Image-ntfs.log"

current pos:  56374 MB,  current status: copying
domain size:  500104 MB,  in    1 area(s)
rescued:        46030 MB,  in 1884 area(s)  (  9.20%)
non-tried:      452717 MB,  in 2482 area(s)  ( 90.52%)

errsize:           1356 MB,  errors:    1888  (  0.27%)
non-trimmed: 1354 MB,  in  342 area(s)  (  0.27%)
non-split:        0 B,  in    0 area(s)  (  0%)
bad-sector:    2304 kB,  in 2180 area(s)  (  0.00%)


Greetings from Slovenia,

        Andrej.