On Wed, Jun 22, 2005 at 02:33:00PM -0700, Harry Mangalam wrote:
> The SMART data ... would tell you considerably more info:
> an example from my home system:
> 1062 $ smartctl -a /dev/hda ...
But does anybody know what all these SMART parameters *mean* ?!?
What is this "Raw_Read_Error_Rate"?
What is this "Seek_Error_Rate"?
AFAIK, only a handful of parameters ("temperature", "reallocated sectors",
and "start stop count") seem to measure something. All the other
stuff appears to be complete gibberish.
Then for the SMART "status", it is completely useless- I had SMART
complain about perfectly good disks ("this disk will fail soon!!!"- a few
120GB WDs that sometimes stop seeking, probably through overheating)
and I had completely unusable disks (i.e. develops about 10 unreadable
sectors per day) that SMART was perfectly happy with.
K.O.
> Vendor Specific SMART Attributes with Thresholds:
> ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED
> WHEN_FAILED RAW_VALUE
> 1 Raw_Read_Error_Rate 0x000b 200 200 051 Pre-fail Always
> - 0
> 3 Spin_Up_Time 0x0007 099 095 021 Pre-fail Always
> - 4141
> 4 Start_Stop_Count 0x0032 100 100 040 Old_age Always
> - 122
> 5 Reallocated_Sector_Ct 0x0033 199 199 140 Pre-fail Always
> - 2
> 7 Seek_Error_Rate 0x000b 200 200 051 Pre-fail Always
> - 0
> 9 Power_On_Hours 0x0032 075 075 000 Old_age Always
> - 18940
> 10 Spin_Retry_Count 0x0013 100 100 051 Pre-fail Always
> - 0
> 11 Calibration_Retry_Count 0x0013 100 100 051 Pre-fail Always
> - 0
> 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always
> - 120
> 196 Reallocated_Event_Count 0x0032 198 198 000 Old_age Always
> - 2
> 197 Current_Pending_Sector 0x0012 200 200 000 Old_age Always
> - 0
> 198 Offline_Uncorrectable 0x0012 200 200 000 Old_age Always
> - 0
> 199 UDMA_CRC_Error_Count 0x000a 200 253 000 Old_age Always
> - 0
> 200 Multi_Zone_Error_Rate 0x0009 200 200 051 Pre-fail Offline
> - 0
>
> SMART Error Log Version: 1
> No Errors Logged
>
>
> On Wednesday 22 June 2005 1:38 pm, Jure Pecar wrote:
> > On Wed, 22 Jun 2005 13:16:33 -0700
> >
> > Harry Mangalam <hjm@xxxxxxxxx> wrote:
> > > Perhaps something like the CDDB, where a you can run an applet on a
> > > cronjob that will upload your disk's SMART data cache to a remote DB on
> > > a regular basis, so the millions of disks out there can be profiled.
> > > Hmmm - sounds like a good undergrad project. Did someone say Summer of
> > > Code? (http://code.google.com/summerofcode.html)
> >
> > Actually if you look at the storagereview.com, they already have a crude
> > form of this online under "reliability survey". You have to login, then you
> > can enter disk model that you have expirience with and what were those
> > expiriences. There's quite some info already available ...
>
> --
> Cheers, Harry
> Harry J Mangalam - 949 856 2847 (vox; email for fax) - hjm@xxxxxxxxx
> <<plain text preferred>>
> -
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--
Konstantin Olchanski
Data Acquisition Systems: The Bytes Must Flow!
Email: olchansk-at-triumf-dot-ca
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