Re: How to force copy retries until finally copied all due to a dying old HDD in Linux?

Date	2015-01-12 22:44 -0800
From	Ant <ant@zimage.comANT>
Newsgroups	comp.os.linux.misc, comp.os.linux.help, comp.os.linux.setup, comp.os.linux.hardware
Subject	Re: How to force copy retries until finally copied all due to a dying old HDD in Linux?
References	(8 earlier) <ZqKdnVdvz4021CzJnZ2dnUU7-QednZ2d@earthlink.com> <m8tvte$679$1@omega-3a.local> <ZrGdnYsSWdAAIC_JnZ2dnUU7-QOdnZ2d@earthlink.com> <HeudndgXhPt6Iy_JnZ2dnUU7-V-dnZ2d@earthlink.com> <m8v7mi$ff4$1@omega-3a.local>
Message-ID	<kcadnYBoDOVYIynJnZ2dnUU7-bGdnZ2d@earthlink.com> (permalink)

Cross-posted to 4 groups.

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On 1/11/2015 5:23 PM, Robert Nichols wrote:
...
>> It failed quickly when I tried it:
>>
>> # time ddrescue -r -1 /dev/sda5 /dev/sdg1/CopiedDyingSDA5 ImageFileLog
>> ddrescue: Can't open output file: Not a directory
>
> You want just
>
>      time ddrescue -r -1 /dev/sda5 /dev/sdg1 ImageFileLog
>
> You don't get to add a name. When it's done, sdg1 will be a mountable
> filesystem identical to however much of sda5 could be recovered. Even the
> filesystem label (if any) and the UUID will be the same, so you might
> want to use /tune2fs/ to change those afterward. There should be enough
> space, as sdg1 is slightly larger than sda5.

Ah. Well, I ended up with a brand new 2 TB WD HDD (partitioned in half 
with EXT4 FS) and my hardware friend replaced the dying HDD in my PC. 
Dying HDD is my sdg(5 is the one I want to copy) and the new HDD 
partition I am making an image is in /media/Storage2b/CopiedDyingStorage 
and 1 TB better be enough. I hope I am doing this correctly for over a 
day so far:

# time ddrescue /dev/sdg5 /media/Storage2b/CopiedDyingStorage ImageFileLog

GNU ddrescue 1.16
Press Ctrl-C to interrupt
Initial status (read from logfile)
rescued:     8641 MB,  errsize:  29099 MB,  errors:      42
Current status
rescued:     8641 MB,  errsize:  29099 MB,  current rate:        0 B/s
rescued:     8718 MB,  errsize:  71006 MB,  current rate:    16384 B/s
    ipos:    18350 kB,   errors:      56,    average rate:     1041 B/s
    opos:    18350 kB,     time since last successful read:       0 s
Splitting failed blocks...

I saw "-rwxrwxrwx 1 root root 8.2G Jan 12 22:34 CopiedDyingStorage". It 
is still going.

$ df
Filesystem                                             1K-blocks 
Used Available Use% Mounted on
rootfs                                                    960504 
733704    178008  81% /
udev                                                       10240 
  0     10240   0% /dev
tmpfs                                                     206056 
5936    200120   3% /run
/dev/disk/by-uuid/242d81f2-8a0d-48e1-a144-22ab4d2b9407    960504 
733704    178008  81% /
tmpfs                                                       5120 
  8      5112   1% /run/lock
tmpfs                                                    1193200 
80   1193120   1% /run/shm
/dev/sda9                                               50013916 
2123204  45350120   5% /home
/dev/sda5                                                 960504 
24568    887144   3% /tmp
/dev/sda8                                               49982172 
6442520  41000644  14% /usr
/dev/sda6                                                4804736 
1801296   2759372  40% /var
/dev/sdb2                                              961428808 
23414852 889176120   3% /media/Storage2b
/dev/sdb1                                              961428808 
351230000 561360972  39% /media/Storage2a

I am surprised the dying HDD still works ever since it went crazy. :P
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