On Mon, Mar 07, 2005 at 01:50:59PM +0000, Jonathan Underwood wrote:
> walter neumann wrote:
>
> >Since upgrading to the 2.6.10 kernels my hard disk started parking 2
> >to 3 times a minute, at which rate it will reach its advertised 'end
> >of life' engineering limit on the number of head parks in less than a
> >year. This is invisible in use: no unusual disk activity is noticable.
> >I discovered it by noticing that my drive's Load_Cycle_Count, as
> >reported by the smartctl, had increased as much in two weeks as in the
> >previous 9 months.
>
> For the unfamiliar with smartctl, can you detail which test specifically
> gives information on Load_Cycle_Count?
using 'smartctl -a /dev/hda' on my laptop gives
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000b 100 100 062 Pre-fail Always - 0
2 Throughput_Performance 0x0005 100 100 040 Pre-fail Offline - 0
3 Spin_Up_Time 0x0007 106 106 033 Pre-fail Always - 3
4 Start_Stop_Count 0x0012 100 100 000 Old_age Always - 358
5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 0
7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always - 0
8 Seek_Time_Performance 0x0005 100 100 040 Pre-fail Offline - 0
9 Power_On_Hours 0x0012 096 096 000 Old_age Always - 1886
10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 354
191 G-Sense_Error_Rate 0x000a 100 100 000 Old_age Always - 0
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 16
193 Load_Cycle_Count 0x0012 057 057 000 Old_age Always - 436830
194 Temperature_Celsius 0x0002 122 122 000 Old_age Always - 45 (Lifetime Min/Max 12/59)
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always - 0
Comparing Load_Cycle_Count to Power_On_Hours results in 3 load cycles per minute!
This disk is running linux 2.6 (rawhide) for quite some time now.
Drives in other systems have much lower Load_Cycle_Counts. Most of the time around equal
to Power_Cycle_Count. One of these machines is just up for a month or so running
rawhide from the beginning and has an power_cycle of 143 and load_cycle of 147.
Is my laptop disk coming to an end??? Or is there an explanation for it...?
-Marcel
--
======-------- Marcel J.E. Mol MESA Consulting B.V.
=======--------- ph. +31-(0)6-54724868 P.O. Box 112
=======--------- marcel@xxxxxxx 2630 AC Nootdorp
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