Groups > alt.folklore.computers > #151268

Re: New hard drive

From	"Jim Thomas" <JT@nospam.com>
Newsgroups	alt.folklore.computers
Subject	Re: New hard drive
Date	2015-09-12 05:21 +1000
Message-ID	<d5gnt9Fjhj8U1@mid.individual.net> (permalink)
References	<mstass$3vb$2@dont-email.me> <d5g6nnFf5u4U1@mid.individual.net> <1%BIx.48652$lq4.42332@fx10.iad> <msus31$v06$1@dont-email.me> <s_CIx.48654$lq4.41579@fx10.iad>

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"Scott Lurndal" <scott@slp53.sl.home> wrote in message 
news:s_CIx.48654$lq4.41579@fx10.iad...
> Dan Espen <despen@verizon.net> writes:
>>scott@slp53.sl.home (Scott Lurndal) writes:
>>
>>> "Osmium" <r124c4u102@comcast.net> writes:
>>>>Does anyone have any idea at all as to what the raw error rate is on a
>>>>current 4 TB drive?  That is before ECC and whatever other magic is 
>>>>applied
>>>>to it. ISTM the signal must be meaured in nanovolts.
>>>
>>> # smartctl --all /dev/sdc
>>> ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE 
>>> UPDATED  WHEN_FAILED RAW_VALUE
>>>   1 Raw_Read_Error_Rate     0x000f   108   099   006    Pre-fail 
>>> s       -       19125192
>>>   5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail 
>>> s       -       0
>>>   7 Seek_Error_Rate         0x000f   063   060   030    Pre-fail 
>>> s       -       1897873
>>...
>>> SMART Error Log Version: 1
>>> No Errors Logged
>>
>>These numbers have never been clear to me.
>
> $ man smartctl
> ...
>
> Each Attribute has a "Raw" value, printed under the heading "RAW_VALUE",

That isn't the case with that Raw_Read_Error_Rate field and Seagate drives.

> and a "Normalized" value printed under the heading "VALUE".  [Note:
> smartctl prints these values  in  base-10.]   In  the example
> just given, the "Raw Value" for Attribute 12 would be the actual number
> of times that the disk has been power-cycled, for example 365 if the
> disk has been turned  on  once  per  day  for exactly one year.
> Each vendor uses their own algorithm to convert this "Raw" value to a
> "Normalized" value in the range from 1 to 254.  Please keep in mind
> that smartctl only reports the different  Attribute types,
> values, and thresholds as read from the device.  It does not carry out
> the conversion between "Raw" and "Normalized" values: this is done by
> the disk's firmware.
> ...
> Each  Attribute  also  has a Threshold value (whose range is 0 to 255)
> which is printed under the heading "THRESH". If the Normalized value is
> less than or equal to the Threshold value, then the Attribute is said
> to have failed. If the Attribute is a pre-failure Attribute, then disk
> failure is imminent.
> ...
> So to summarize: the Raw Attribute values are the ones that might have
> a real physical interpretation, such as "Temperature Celsius", "Hours",
> or "Start-Stop Cycles".  Each  manufacturer  converts  these,  using
> their detailed knowledge of the disk's operations and failure modes, to
> Normalized Attribute values in the range 1-254.  The current and worst
> (lowest  measured)  of  these Normalized  Attribute  values are stored
> on the disk, along with a Threshold value that the manufacturer has
> determined will indicate that the disk is going to fail, or that it has
> exceeded its design  age or aging limit.  smartctl does not calculate
> any of the Attribute values, thresholds, or types, it merely reports
> them from the SMART data on the device.
>
>
>>How can the worst be 99, but the value 108?
>
> Because failure is indicated by VALUE < THRESH.
>

Thread

New hard drive philo <philo@privacy.net> - 2015-09-10 20:33 -0500
  Re: New hard drive Michael Black <et472@ncf.ca> - 2015-09-10 23:23 -0400
    Re: New hard drive Bob Martin <bob.martin@excite.com> - 2015-09-11 07:07 +0100
    Re: New hard drive philo <philo@privacy.net> - 2015-09-14 10:20 -0500
      Re: New hard drive Michael Black <et472@ncf.ca> - 2015-09-14 13:53 -0400
        Re: New hard drive philo <philo@privacy.net> - 2015-09-14 13:05 -0500
          Re: New hard drive Michael Black <et472@ncf.ca> - 2015-09-14 15:09 -0400
            Re: New hard drive philo <philo@privacy.net> - 2015-09-14 14:18 -0500
      Re: New hard drive Ahem A Rivet's Shot <steveo@eircom.net> - 2015-09-15 10:08 +0100
        Re: New hard drive philo <philo@privacy.net> - 2015-09-15 05:28 -0500
          Re: New hard drive Morten Reistad <first@last.name> - 2015-09-15 13:43 +0200
            Re: New hard drive Peter Flass <peter_flass@yahoo.com> - 2015-09-15 16:19 +0000
              Re: New hard drive philo <philo@privacy.net> - 2015-09-15 13:15 -0500
                Re: New hard drive Stan Barr <plan.b@bluesomatic.org> - 2015-09-16 07:04 +0000
                Re: New hard drive philo <philo@privacy.net> - 2015-09-16 08:39 -0500
                Re: New hard drive Joe Makowiec <makowiec@invalid.invalid> - 2015-09-16 14:52 +0000
                Re: New hard drive philo <philo@privacy.net> - 2015-09-17 15:37 -0500
                Re: New hard drive scott@slp53.sl.home (Scott Lurndal) - 2015-09-16 13:42 +0000
              Re: New hard drive Walter Banks <walter@bytecraft.com> - 2015-09-15 15:34 -0400
                Re: New hard drive Dan Espen <despen@verizon.net> - 2015-09-15 17:29 -0400
                Re: New hard drive Peter Flass <peter_flass@yahoo.com> - 2015-09-16 22:00 +0000
                Re: New hard drive Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-09-17 03:58 +0000
                Re: New hard drive "Charles Richmond" <numerist@aquaporin4.com> - 2015-09-17 00:43 -0500
                Re: New hard drive Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-09-17 05:59 +0000
                Re: New hard drive Peter Flass <peter_flass@yahoo.com> - 2015-09-17 11:51 +0000
                Re: New hard drive hancock4@bbs.cpcn.com - 2015-09-17 13:18 -0700
                Re: New hard drive Walter Banks <walter@bytecraft.com> - 2015-09-17 19:15 -0400
                Re: New hard drive "Jim Thomas" <JT@nospam.com> - 2015-09-20 17:27 +1000
                Re: New hard drive hancock4@bbs.cpcn.com - 2015-09-17 13:13 -0700
                Re: New hard drive Walter Banks <walter@bytecraft.com> - 2015-09-17 06:24 -0400
                Re: New hard drive Peter Flass <peter_flass@yahoo.com> - 2015-09-17 11:51 +0000
                Re: New hard drive Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-09-17 18:02 +0000
            Re: New hard drive philo <philo@privacy.net> - 2015-09-15 13:12 -0500
              Re: New hard drive Peter Flass <peter_flass@yahoo.com> - 2015-09-16 22:00 +0000
                Re: New hard drive philo <philo@privacy.net> - 2015-09-17 19:29 -0500
              Re: New hard drive "Kerr Mudd-John" <admin@127.0.0.1> - 2015-09-17 10:29 +0100
                Re: New hard drive philo <philo@privacy.net> - 2015-09-17 19:31 -0500
        Re: New hard drive Peter Flass <peter_flass@yahoo.com> - 2015-09-15 16:19 +0000
          Re: New hard drive Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-09-15 17:48 +0000
          Re: New hard drive philo <philo@privacy.net> - 2015-09-15 13:17 -0500
  Re: New hard drive "Osmium" <r124c4u102@comcast.net> - 2015-09-11 09:28 -0500
    Re: New hard drive scott@slp53.sl.home (Scott Lurndal) - 2015-09-11 14:59 +0000
      Re: New hard drive Dan Espen <despen@verizon.net> - 2015-09-11 11:32 -0400
        Re: New hard drive Bob Eager <news0005@eager.cx> - 2015-09-11 16:06 +0000
        Re: New hard drive scott@slp53.sl.home (Scott Lurndal) - 2015-09-11 16:06 +0000
          Re: New hard drive "Jim Thomas" <JT@nospam.com> - 2015-09-12 05:21 +1000
        Re: New hard drive "Jim Thomas" <JT@nospam.com> - 2015-09-12 05:16 +1000
      Re: New hard drive "Osmium" <r124c4u102@comcast.net> - 2015-09-11 10:42 -0500
        Re: New hard drive scott@slp53.sl.home (Scott Lurndal) - 2015-09-11 16:09 +0000
          Re: New hard drive Dan Espen <despen@verizon.net> - 2015-09-11 12:20 -0400
        Re: New hard drive "Jim Thomas" <JT@nospam.com> - 2015-09-12 05:18 +1000
      Re: New hard drive "Jim Thomas" <JT@nospam.com> - 2015-09-12 05:08 +1000
    Re: New hard drive "Charles Richmond" <numerist@aquaporin4.com> - 2015-09-11 14:34 -0500
      Re: New hard drive philo <philo@privacy.net> - 2015-09-15 05:29 -0500
    Re: New hard drive terry+googleblog@tmk.com - 2015-09-11 16:05 -0700
  Re: New hard drive Walter Banks <walter@bytecraft.com> - 2015-09-11 11:55 -0400
    Re: New hard drive Shadow <Sh@dow.br> - 2015-09-11 14:42 -0300
      Re: New hard drive Michael Black <et472@ncf.ca> - 2015-09-11 16:10 -0400
        Re: New hard drive Anne & Lynn Wheeler <lynn@garlic.com> - 2015-09-11 15:07 -0700
          Re: New hard drive sidd@situ.com (sidd) - 2015-09-12 15:34 -0400
            Re: New hard drive Anne & Lynn Wheeler <lynn@garlic.com> - 2015-09-12 12:56 -0700
              Re: New hard drive Anne & Lynn Wheeler <lynn@garlic.com> - 2015-09-12 13:02 -0700
    Re: New hard drive "Charles Richmond" <numerist@aquaporin4.com> - 2015-09-11 14:39 -0500
      Re: New hard drive philo <philo@privacy.net> - 2015-09-14 10:25 -0500
    Re: New hard drive philo <philo@privacy.net> - 2015-09-14 10:22 -0500
      Re: New hard drive Michael Black <et472@ncf.ca> - 2015-09-14 13:49 -0400
        Re: New hard drive philo <philo@privacy.net> - 2015-09-14 13:07 -0500
  Re: New hard drive hancock4@bbs.cpcn.com - 2015-09-14 11:10 -0700
    Re: New hard drive philo <philo@privacy.net> - 2015-09-14 14:45 -0500

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