WD green Load Cycle Count, is it a problem or not?

[crowi]

Hi Community,

I just disassembled a Buffalo NAS (Linkstation Duo LS-WXL) from our little company.
It ran almost 4 years without any problems 24/7 and was after installation just turned off once for a firmware update.

To my surprise it contained WD Greens WD10-EADS. (I also had a Buffalo once which was equipped with Seagates).

As said, the disks are still healthy and we never encountered an error, but I was a little shocked about the LCC value.

Here we go:

Code: Select all

smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.13.0-29-generic] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Caviar Green
Device Model:     WDC WD10EADS-00M2B0
Serial Number:    WD-XXXXXXXXXXXXX
LU WWN Device Id: 5 0014ee 2af3b691b
Firmware Version: 01.00A01
User Capacity:    1,000,204,886,016 bytes [1.00 TB]
Sector Size:      512 bytes logical/physical
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS (minor revision not indicated)
SATA Version is:  SATA 2.6, 3.0 Gb/s
Local Time is:    Wed Aug 27 23:03:16 2014 CEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

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   200   200   051    Pre-fail  Always       -       0
  3 Spin_Up_Time            0x0027   208   194   021    Pre-fail  Always       -       5600
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       32
  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   055   055   000    Old_age   Always       -       33501
 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       -       30
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       29
193 Load_Cycle_Count        0x0032   001   001   000    Old_age   Always       -       4377523
194 Temperature_Celsius     0x0022   111   102   000    Old_age   Always       -       36
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   200   200   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      -       0

4.377.523 load cycles is pretty impressive, as the drives are only spec'd for 300.000
http://wdc.com/en/library/sata/2879-701229.pdf

Privately I always use wdidle to disable this excessive headparking, but here I missed it.

So either the drives are much tougher than expected or maybe I was jst lucky.

Cheers,
Crowi

[b0ssman]

i think you are just lucky.

unfortunately if they fail because of that they give no warning. i.e no reallocated sector count etc.

[substr]

Older WDC note (circa 2008, 2009?) claimed 1,000,000 cycle 'validation'(or some word), I recall. And of course, newer specs show a much lower number. But wow, over 4 million is impressive.

This is a vertical mount? Maybe that helps.

[crowi]

i think you are just lucky.

Yes, I think so, too.
And I replaced this 'server' now by a new HP N54L with Nas4free and a 2x3TB ZFS Mirror (WD Red)
But I also backed up the data frequently rotating on 4 different disks, but now I feel still a little shocked.
From the Buffalo WebGUI, you can't get SMART values or any information about the drives.

This is a vertical mount? Maybe that helps.

Yes, it's a vertical system.

Cheers,
Crowi