Mailinglist Archive: opensuse (795 mails)

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Re: [opensuse] another WD Green AV-GP HD failure
Hello,

On Wed, 01 Nov 2017, Felix Miata wrote:
The DVDR froze trying to play a recording, so I shut it down, pulled the HD
out,
and made an image of it thus:

ddrescue -d /dev/sdc dvdrfile.img dvdrfile.logfile

Rescued size while running was 10MB less than total size.

You probably misread the output ;) If you watch progress, you'll see
ipos/opos starts at the start of the defect(s), tries to read, and
then skips what was already read. If you have e.g. some "special" DVDs
with (simulated) defects at the start, then ddrescue tries at the
start, skips ahead, reads the rest of the disk, retries at the start,
and ipos/opos might end up at 20MB when done. When 6678MB of 6679MB
were read successfully. BTDT.

Average rate was 49894kB/s. Errsize: 67072B. Errors: 81. Rescued:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^ that's what counts
320072MB. ipos/opos 314588MB. Runtime: 106min.

[REORDERED]
Excerpt from smartctl -x:
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE
1 Raw_Read_Error_Rate POSR-K 200 200 051 - 906
3 Spin_Up_Time POS--K 154 153 021 - 3266
4 Start_Stop_Count -O--CK 099 099 000 - 1529
5 Reallocated_Sector_Ct PO--CK 200 200 140 - 0
7 Seek_Error_Rate -OSR-K 200 200 000 - 0
9 Power_On_Hours -O--CK 072 072 000 - 20906
10 Spin_Retry_Count -O--CK 100 100 000 - 0
11 Calibration_Retry_Count -O--CK 100 100 000 - 0
12 Power_Cycle_Count -O--CK 099 099 000 - 1518
192 Power-Off_Retract_Count -O--CK 200 200 000 - 39
193 Load_Cycle_Count -O--CK 200 200 000 - 1529
194 Temperature_Celsius -O---K 102 084 000 - 41
196 Reallocated_Event_Count -O--CK 200 200 000 - 0
197 Current_Pending_Sector -O--CK 198 198 000 - 131
^^^
That looks quite fine besides the "Current Pending". And:
131*512 = 67072 Bytes = 65.5kB. Matches.

[REORDERED]
Should I try again using -r12 or more, or with other options? Or with
dc3dd, or something else? Should I try again after dropping its
temperature in the refrigerator or freezer? Is more improvement
pointless to hope for?

You can try... But as the disk has flagged 131 sectors as bad (but
pending to be mapped out as defect -> Reallocated), I doubt you'll
get more off that disk. You're missing 65.5kB. You decide.

HTH,
-dnh

--
"I treat shops as military objectives to be penetrated
and stripped of needed resources in as little time as
possible. She has adventures in them." -- Joe Thompson

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