Hi,
I just received my new (?) HDD in an open antistatic bag with following SMART attributes:
Code:
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 100 253 021 Pre-fail Always - 0
4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 3
5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0
7 Seek_Error_Rate 0x002e 100 253 000 Old_age Always - 0
9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 0
10 Spin_Retry_Count 0x0032 100 253 000 Old_age 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 - 3
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 1
193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always - 1
194 Temperature_Celsius 0x0022 117 117 000 Old_age Always - 30
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
I'm a bit puzzled about the interpretation of these values... I understand the spindle has started to rotate 3 times (SMART attribute #4) which is in line with the power cycle count of 3 (SMART attribute #12). Now what about this 'Power Off Retract Count' (SMART attribute #192) and the 'Load Cycle Count' (SMART attribute # 193) of both being only 1?
Goggling around I found many quite contradictory explanations about these 2 latter attributes...
#192:
Wikipedia: "Count of times the heads are loaded off the media. Heads can be unloaded without actually powering off."
HD Sentinel: "Count of power off cycles"
Both these information are logically not fitting together. And in this SMART example above clearly the the drive has been powered up/down 3 times but power off retract count is only 1. How can that be?
#193:
Wikipedia: "Count of load/unload cycles into head landing zone position."
HD Sentinel: "Count of load/unload cycles"
How can the drive in this example above has been power cycled 3 times and the head unloaded only 1 time??
In any case this HDD is not totally new, since it has been power cycled at least 2 times before I connected it. Not a big problem at all I guess but still a bit unpleasant given the fact that the manufacturing date is Jan 2014 and I just received it today. Like I'm used to do I will start a surface scan before I will fill it with data.
BTW what would you guys advise to check / test basically before starting to use a new (?) drive? Simple surface read scan or filling it with zeros or more?
Thanks for your answers!
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