How to interpret Disk Diagnostics?

4ndy

Forum Supporter
My Humax is just 9 months old, but came with a 2 year warranty. I decided to risk it and have installed custom firmware.

The disk diagnostics below contain phrase like "pre-fail", "od age" and "failing now". should I be worried? I am a heavy user and have been moving files between hard dives for two days.

Code:
Attributes
ID    Name    Flags    Raw Value    Value    Worst    Thresh    Type    Updated    When Failed
1    Raw_Read_Error_Rate    POSR--    119154466    117    099    006    Pre-fail    Always    -
3    Spin_Up_Time    PO----    0    095    095    000    Pre-fail    Always    -
4    Start_Stop_Count    -O--CK    1876    099    099    020    Old_age    Always    -
5    Reallocated_Sector_Ct    PO--CK    0    100    100    036    Pre-fail    Always    -
7    Seek_Error_Rate    POSR--    119576947    081    060    030    Pre-fail    Always    -
9    Power_On_Hours    -O--CK    4100    096    096    000    Old_age    Always    -
10    Spin_Retry_Count    PO--C-    0    100    100    097    Pre-fail    Always    -
12    Power_Cycle_Count    -O--CK    938    100    100    020    Old_age    Always    -
184    End-to-End_Error    -O--CK    0    100    100    099    Old_age    Always    -
187    Reported_Uncorrect    -O--CK    0    100    100    000    Old_age    Always    -
188    Command_Timeout    -O--CK    0    100    100    000    Old_age    Always    -
189    High_Fly_Writes    -O-RCK    0    100    100    000    Old_age    Always    -
190    Airflow_Temperature_Cel    -O---K    55    045    043    045    Old_age    Always    FAILING_NOW
194    Temperature_Celsius    -O---K    55    055    057    000    Old_age    Always    -
195    Hardware_ECC_Recovered    -O-RC-    119154466    045    028    000    Old_age    Always    -
197    Current_Pending_Sector    -O--C-    0    100    100    000    Old_age    Always    -
198    Offline_Uncorrectable    ----C-    0    100    100    000    Old_age    Offline    -
199    UDMA_CRC_Error_Count    -OSRCK    0    200    200    000    Old_age    Always    -
Self-test logs
No.    Description    Status    Remaining    When    First Error LBA
# 1    Short offline    Completed without error    00%    4007    -
# 2    Short offline    Completed without error    00%    3972    -
# 3    Short offline    Completed without error    00%    2434    -
# 4    Short offline    Completed without error    00%    1791    -
# 5    Short offline    Completed without error    00%    865    -
 

Ezra Pound

Well-Known Member
there isn't anything to be concerned about in HDD parameters, you need to check a few 'raw values' from time to time in lines 5, 197 and 198 and as yours are all at zero that is good, small values that don't change for long periods are also of little concern. lines 9 and 4 show that the drive has been 'on' for an average of 15 hours day, which is over twice the average and the number on on-off cycles is about average
 

Black Hole

May contain traces of nut
As far as I know that's the "type"* field you are reading, which is more of a property of the statistic than a comment on the health. The figure to watch is the "offline uncorrectable".

* Corrected after posting
 

Ezra Pound

Well-Known Member
As far as I know that's the "update" field you are reading, which is more of a property of the statistic than a comment on the health. The figure to watch is the "offline uncorrectable". (before editing)
The "update" field contains words 'always' or 'offline', the 'raw values' are on the far left not the far right, see the headings in the top line. offline uncorrectable = line 198 and is zero as stated
EDIT
It isn't the 'type' field either.
 

af123

Administrator
Staff member
Nothing to worry about there. The old-age and pre-fail are the Type column which just says what this field indicates. It is perfectly normal (although disconcerting!) to see FAILING_NOW against airflow temperature from time to time.
 

Ezra Pound

Well-Known Member
Although line 194 raw value (55 deg. C) is meaningful, the 'value' in 190 doesn't seem to be of any use on the Humax drives, it is usually 100 - 55 (the 'value' of 194 ) as it is in this case e.g. 45
 

mole_hill

Member
I've had a look at my HDR disk diagnostics in the Webif and one of the HDRs has an "amber" coloured line for ID 5 with a raw value of 96. Does this mean anything? The HDR is two years old.

The lines 197 and 198 have raw values of zero.

Thanks

IDNameFlagsRaw ValueValueWorstThreshTypeUpdatedWhen Failed
1 Raw_Read_Error_Rate POSR-- 230281170 119 099 006 Pre-fail Always -
3 Spin_Up_Time PO---- 0 097 097 000 Pre-fail Always -
4 Start_Stop_Count -O--CK 10530 090 090 020 Old_age Always -
5 Reallocated_Sector_Ct PO--CK 96 098 098 036 Pre-fail Always -
7 Seek_Error_Rate POSR-- 116231335 080 060 030 Pre-fail Always -
9 Power_On_Hours -O--CK 4168 096 096 000 Old_age Always -
10 Spin_Retry_Count PO--C- 0 100 100 097 Pre-fail Always -
12 Power_Cycle_Count -O--CK 5265 095 095 020 Old_age Always -
184 End-to-End_Error -O--CK 0 100 100 099 Old_age Always -
187 Reported_Uncorrect -O--CK 0 100 100 000 Old_age Always -
188 Command_Timeout -O--CK 0 100 100 000 Old_age Always -
189 High_Fly_Writes -O-RCK 1 099 099 000 Old_age Always -
190 Airflow_Temperature_Cel -O---K 54 046 040 045 Old_age Always In_the_past
194 Temperature_Celsius -O---K 54 054 060 000 Old_age Always -
195 Hardware_ECC_Recovered -O-RC- 230281170 047 037 000 Old_age Always -
197 Current_Pending_Sector -O--C- 0 100 100 000 Old_age Always -
198 Offline_Uncorrectable ----C- 0 100 100 000 Old_age Offline -
199 UDMA_CRC_Error_Count -OSRCK 0 200 200 000 Old_age Always -
 

af123

Administrator
Staff member
It means that your disk has, at some point in its past, had to reallocate 96 physical sectors due to media defects. Unfortunately, there's no way to tell if that is something that happened early in the disk's life or more recently.
It isn't necessarily a problem (most disks have defects as they leave the factory and will reallocate sectors at some time). Keep an eye on it and if the number starts increasing then it could indicate that the disk is on the way out.
 
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