WDC WD20EARS-60MVWB0 SMART Info Problem - Without Temperature_Celsius


#1

I just buy this harddisk. And it show up without temperature.

As I know other version of WD20EARS have temperature info. So I think that is Firmware Problem.

Also, the WD Support is too bad. Ticket create at 27-4, and It still don’t have any reply.

SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x002f 100 253 051 Pre-fail Always - 0
3 Spin_Up_Time 0x0027 253 253 021 Pre-fail Always - 1058
4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 10
5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0
7 Seek_Error_Rate 0x002f 100 253 051 Pre-fail Always - 0
9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 5
10 Spin_Retry_Count 0x0033 100 253 051 Pre-fail Always - 0
11 Calibration_Retry_Count 0x0032 100 253 000 Old_age Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 8
184 Unknown_Attribute 0x0033 100 100 097 Pre-fail Always - 0
187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0
188 Unknown_Attribute 0x0032 100 100 000 Old_age Always - 0
190 Airflow_Temperature_Cel 0x0022 057 053 040 Old_age Always - 43 (Lifetime Min/Max 30/47)
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 7
193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always - 2
196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0
197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0030 100 253 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x0008 100 253 000 Old_age Offline - 0


#2

I don’t understand your problem. Attribute 190 is reporting the current temperature as 43C.


#3

Attribute 190 not equal to Attribute 194

It missing Attribute 194 (HDA Temperature)

Ref : http://wdc.custhelp.com/app/answers/detail/a_id/1087


#4

yes you are right

i think is parameter 194 that you want

see my wd20ears

] http://i56.tinypic.com/eju6ih.png

something wrong with your smart data

return the drive if you can and buy another one


#5

I have 2 of them and both have same problem and Western Digital Support without any reply on my ticket. Their service is too bad…


#6

That’s interesting.

I’ve always thought that having two temperature attributes was redundant. It seems that WD has also taken that view, although there appears to be an inconsistency in their choice. AFAICT, “Airflow Temperature” and “HDA Temperature” use the same temperature sensor. In some models, from other manufacturers, attribute 190 is defined as “Temperature Difference from 100”, so it is directly related to attribute 194. This appears to be how WD has implemented it.

See http://en.wikipedia.org/wiki/S.M.A.R.T.


#7

All other version of WD20EARS or other EARS Model have attribute 194. Only this version without it, and with some other unknow attribute. I am sure it have some problem within firmware.


#8

The “unknown” attributes are only unknown to your SMART software. They are known to Western Digital, and to Wikipedia.

184 End-to-End error
188 Command Timeout

FYI, here are the attribute names that I extracted from two WD utilities:

http://en.wikipedia.org/wiki/Talk:S.M.A.R.T.#Attributes_185_.26_186_.28WDC.29
http://en.wikipedia.org/wiki/Talk:S.M.A.R.T.#More_WDC_SMART_attributes


#9

Then how to explain all other version of WD20EARS and other EARS model with normal attributes. only this version is different.


#10

I agree that it’s an annoying change, and that WD should have stuck with attribute 194. Unfortunately there is no real standard for SMART reporting, so manufacturers can do what they like. That makes it very tough for SMART software authors. In fact the smartmontools project maintains a database of drive models so that you can include such changes. You can also customise the reporting of each attribute in order to accommodate any variation or peculiarity. I have found the smartmontools forum to be very helpful in this regard.

http://sourceforge.net/mailarchive/forum.php?forum_name=smartmontools-support


#11

I can accept different Model with different spec. but for the same model. I don’t think that can have big different.

Also they have their standard. : http://wdc.custhelp.com/app/answers/detail/a_id/1087

The main problem for me is coz my NAS(Synology) can’t read the HD Temperature that make it not information to control the fan.