Re: Power-Off Retract Count raw value 2293768

Discussion in 'Storage Devices' started by Arno, Jul 31, 2012.

  1. Arno

    Arno Guest

    AndyHancock <> wrote:
    > My Toshiba Satellite A660 has been in for servicing quite a bit over
    > the last 8 months for ongoing problems, and it seems over them now. I
    > just managed to do a SMART report, and all seems normal except for a
    > rather large number that I'm not sure what to make of I already
    > followed the wikipedia breakdown of the parameters). I've attached an
    > extract of the report below, and I removed the VALUE column preceding
    > the WORST column because all the figures were the same except for #10,
    > Spin_Retry_Count (102 instead of 100). Also, #194,


    Higher is better.

    > Temperature_Celsius as the note "(Min/Max 24/53)" after the RAW_VALUE
    > figure. This edits are attempts to keep text rows below 80 characters
    > in order to avoid wrap-around.


    > What I really caught my attention was Power-Off Retract Count raw
    > value, 2293768.


    Ah, yes. This is probably some funky count-down. Raw numbers are
    tricky. I suspect the drive would long be dead otherwise and
    it would definitely not have a coocked value of 100 (i.e.
    perfectly fine).

    > The normalized values seem to indicate that all is
    > well, and I tried googling typical values. The only hit that seemed
    > relevant is http://community.wdc.com/t5/Desktop-Portable-Drives/HDD-and-BIOS-detection-issues/td-p/359927,
    > which reports a raw value of 63.


    > The Load_Cycle_Count 3871 also seems high, but Wikipedia says typical
    > HDs can sustain 300K to 600K.


    for 2.5" HDDs typically 500'000-1 Million. 3871 is pretty low.

    > Further googling says that some linux systems can drive up the count,
    > but this is Windows 7.


    The problem with Linux (or rather the brain-dead HDD engineers,
    e.g. at WD) is that Linux accesses disks every 30 seconds or
    so. If the disk does a head retract after 25 secs, it gets
    a lot of head-loads. I just barely caught one of my 2.5"
    drives at 800'000 of them. Also google wdidle3 in this
    group for more on that stupidity.

    > Is the large raw number ignorable considering the healthy-looking
    > normalized number?


    Depends. But from the raw output below, I would say your
    drive is perfectly fine. There is absolutely nothing
    even slighly suspicuous I can see.

    But note that depending on the nature of problems, your
    disk may be entirely innocent, even if it looks like
    disk trouble. Bad RAM, overheating of other components,
    bad power, etc. can all look similar to disk troubles.

    Arno





    > ----------------------------------------------------------------------
    > The following needs to be viewed in nonproportional font. If using
    > Google Groups, this is accessible via the Options link at upper right
    > corner.


    > smartctl 5.43 2012-06-30 r3573 [i686-pc-cygwin-win7(64)]
    > (cygwin-5.43-1)
    > Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net


    > === START OF INFORMATION SECTION ===
    > Device Model: TOSHIBA MK6476GSXN
    > Serial Number: Y1DQC0GOT
    > LU WWN Device Id: 5 000039 3a3f854e2
    > Firmware Version: GB001M
    > User Capacity: 640,135,028,736 bytes [640 GB]
    > Sector Size: 512 bytes logical/physical
    > ATA Version is: 8
    > ATA Standard is: Exact ATA specification draft version not indicated
    > Local Time is: Thu Jul 26 01:09:18 2012 EDT
    > SMART support is: Available - device has SMART capability.
    > SMART support is: Enabled


    > === START OF READ SMART DATA SECTION ===
    > SMART overall-health self-assessment test result: PASSED


    > <...snip...>


    > SMART Attributes Data Structure revision number: 16
    > Vendor Specific SMART Attributes with Thresholds:
    > ID# ATTRIBUTE_NAME WORST THRESH TYPE UPDATED WHEN_FAILED
    > RAW_VALUE
    > 1 Raw_Read_Error_Rate 100 050 Pre-fail Always -
    > 0
    > 2 Throughput_Performance 100 050 Pre-fail Offline -
    > 0
    > 3 Spin_Up_Time 100 001 Pre-fail Always -
    > 2025
    > 4 Start_Stop_Count 100 000 Old_age Always -
    > 106
    > 5 Reallocated_Sector_Ct 100 050 Pre-fail Always -
    > 0
    > 7 Seek_Error_Rate 100 050 Pre-fail Always -
    > 0
    > 8 Seek_Time_Performance 100 050 Pre-fail Offline -
    > 0
    > 9 Power_On_Hours 099 000 Old_age Always -
    > 405
    > 10 Spin_Retry_Count 100 030 Pre-fail Always -
    > 0
    > 12 Power_Cycle_Count 100 000 Old_age Always -
    > 106
    > 191 G-Sense_Error_Rate 100 000 Old_age Always -
    > 1
    > 192 Power-Off_Retract_Count 100 000 Old_age Always -
    > 2293768
    > 193 Load_Cycle_Count 100 000 Old_age Always -
    > 3871
    > 194 Temperature_Celsius 100 000 Old_age Always -
    > 38
    > 196 Reallocated_Event_Count 100 000 Old_age Always -
    > 0
    > 197 Current_Pending_Sector 100 000 Old_age Always -
    > 0
    > 198 Offline_Uncorrectable 100 000 Old_age Offline -
    > 0
    > 199 UDMA_CRC_Error_Count 200 000 Old_age Always -
    > 0
    > 220 Disk_Shift 100 000 Old_age Always -
    > 8255
    > 222 Loaded_Hours 100 000 Old_age Always -
    > 213
    > 223 Load_Retry_Count 100 000 Old_age Always -
    > 0
    > 224 Load_Friction 100 000 Old_age Always -
    > 0
    > 226 Load-in_Time 100 000 Old_age Always -
    > 305
    > 240 Head_Flying_Hours 100 001 Pre-fail Offline -
    > 0


    > SMART Error Log Version: 1
    > No Errors Logged


    > SMART Self-test log structure revision number 1
    > Num Test_Description Status Remaining
    > LifeTime(hours) LBA_of_first_error
    > # 1 Short offline Completed without error 00%
    > 125 -


    > <...snip...>


    --
    Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email:
    GnuPG: ID: 1E25338F FP: 0C30 5782 9D93 F785 E79C 0296 797F 6B50 1E25 338F
    ----
    Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans
     
    Arno, Jul 31, 2012
    #1
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