[Bug 438136] Re: palimpsest bad sectors false positive

[Martin Pitt]

** Description changed:

  Binary package hint: gnome-disk-utility
  
  palimpsest complains, that the disk has many bad sectors. palimpsest
  thinks, that SMART value 5 "Reallocated Sector Count" fails (screenshot
  attached). smartctl reports "  5 Reallocated_Sector_Ct   0x0033   097
  097   010    Pre-fail  Always       -       117" (full log attached)
  which seems to be ok. This error appears on a different system, too.
  
+ SRU information:
+  - Impact: Way too trigger happy about "broken disk" notifications, which both scares people and also makes them ignore situations where the disk is actually about to die
+  - Fixed in lucid by reverting from our own bad sectors heuristics (using the raw numbers) to the manufactuer normalized numbers and manufacturer thresholds: http://bugs.freedesktop.org/attachment.cgi?id=34242
+ - No regression reports since then in lucid.
+ 
  SRU TEST CASE:
  - Download seb128's demo SMART data which have a few bad blocks, but not enough to be over the manufacturer threshold:
  
-    wget -O /tmp/smart.blobl
+    wget -O /tmp/smart.blobl
  http://bugs.freedesktop.org/attachment.cgi?id=34234
  
  - Install libatasmart-bin
  
  - Run
  
-   skdump --load=/tmp/smart.blob --overall
+   skdump --load=/tmp/smart.blob --overall
  
  With the karmic final version this says "BAD_SECTOR_MANY" which the GUI will react on with a scary notification.
  The updated version should just say BAD_SECTOR.
  
  If you leave out the --overall argument, you get a detailled list of the
  attributes. The broken ones will be printed in bold.
  
  On a healthy system, "sudo ./skdump   /dev/sda --overall" should still
  say "GOOD", and on a genuinely broken hard disk it should give the
  appropriate BAD_SECTOR/BAD_SECTOR_MANY answer.
  
  ProblemType: Bug
  Architecture: amd64
  Date: Mon Sep 28 15:20:15 2009
  DistroRelease: Ubuntu 9.10
  Package: gnome-disk-utility 2.28.0-0ubuntu2
  ProcEnviron:
   PATH=(custom, user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.31-11.36-generic
  SourcePackage: gnome-disk-utility
  Uname: Linux 2.6.31-11-generic x86_64

** Description changed:

  Binary package hint: gnome-disk-utility
  
  palimpsest complains, that the disk has many bad sectors. palimpsest
  thinks, that SMART value 5 "Reallocated Sector Count" fails (screenshot
  attached). smartctl reports "  5 Reallocated_Sector_Ct   0x0033   097
  097   010    Pre-fail  Always       -       117" (full log attached)
  which seems to be ok. This error appears on a different system, too.
  
  SRU information:
-  - Impact: Way too trigger happy about "broken disk" notifications, which both scares people and also makes them ignore situations where the disk is actually about to die
-  - Fixed in lucid by reverting from our own bad sectors heuristics (using the raw numbers) to the manufactuer normalized numbers and manufacturer thresholds: http://bugs.freedesktop.org/attachment.cgi?id=34242
+  - Impact: Way too trigger happy about "broken disk" notifications, which both scares people and also makes them ignore situations where the disk is actually about to die
+  - Fixed in lucid by reverting from our own bad sectors heuristics (using the raw numbers) to the manufactuer normalized numbers and manufacturer thresholds: http://bugs.freedesktop.org/attachment.cgi?id=34242
  - No regression reports since then in lucid.
  
  SRU TEST CASE:
  - Download seb128's demo SMART data which have a few bad blocks, but not enough to be over the manufacturer threshold:
  
-    wget -O /tmp/smart.blobl
+    wget -O /tmp/smart.blob
  http://bugs.freedesktop.org/attachment.cgi?id=34234
  
  - Install libatasmart-bin
  
  - Run
  
    skdump --load=/tmp/smart.blob --overall
  
  With the karmic final version this says "BAD_SECTOR_MANY" which the GUI will react on with a scary notification.
  The updated version should just say BAD_SECTOR.
  
  If you leave out the --overall argument, you get a detailled list of the
  attributes. The broken ones will be printed in bold.
  
  On a healthy system, "sudo ./skdump   /dev/sda --overall" should still
  say "GOOD", and on a genuinely broken hard disk it should give the
  appropriate BAD_SECTOR/BAD_SECTOR_MANY answer.
  
  ProblemType: Bug
  Architecture: amd64
  Date: Mon Sep 28 15:20:15 2009
  DistroRelease: Ubuntu 9.10
  Package: gnome-disk-utility 2.28.0-0ubuntu2
  ProcEnviron:
   PATH=(custom, user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.31-11.36-generic
  SourcePackage: gnome-disk-utility
  Uname: Linux 2.6.31-11-generic x86_64

-- 
palimpsest bad sectors false positive
https://bugs.launchpad.net/bugs/438136
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