[OpenIndiana-discuss] SMART status changing?

[Roy Sigurd Karlsbakk]

somewhat it does, and again, not.

The error rate on the disk has the same numbers as earlier, but now health is reported as good, as in FAILING NOW a few hours ago


----- Opprinnelig melding -----
> On "complete drive failure", you are probably correct but SMART has
> layers. There is a overall PASS/FAIL status which generally reads:
> 
> === START OF READ SMART DATA SECTION ===
> SMART overall-health self-assessment test result: PASSED
> See vendor-specific Attribute list for marginal Attributes.
> 
> If you look at the attribute list, you will often see sectors pending
> failure and failed yet the drive still says that it status is PASSED.
> 
> I was responding with the assumption that smartctl was kicking out
> emails or to system log that 1 or 2 sectors failed but later they
> would
> disappear in later reports/updates because they had been reallocated.
> 
> So I think we need to better understand what smartctl is reporting: a
> FAILED drive or a few sectors pending failure or failed.
> 
> If the overall status states FAILED, its probably about to die and
> should be replaced ASAP. I've seen one or two drives report FAILED and
> then later PASSED but they ultimately died in less then 48 hours.
> 
> I hope that clarifies my response.
> Cheers,
> Scott LeFevre
> 
> 
> On Mon, 2012-04-30 at 22:29 +0200, Roy Sigurd Karlsbakk wrote:
> 
> > Are you sure? I thought SMART usually reports failure only after a
> > few hundred/thousands sectors have failed and spare sectors are
> > running short…
> >
> > roy
> >
> > ----- Opprinnelig melding -----
> > > I've run across this before. What generally happens is a sector
> > > will
> > > become unreadable/failed and get reported by smartctl. If the file
> > > system is active and the file using that sector is updated/over
> > > written,
> > > the drive will reallocate the sector and fall off as a problem
> > > within
> > > SMART. The thing to watch are the sector reporting attributes
> > > using
> > > 'smartctl -a'. Specifically, keep tabs on the following:
> > >
> > > ID# ATTRIBUTE_NAME
> > > 5 Reallocated_Sector_Ct
> > > 197 Current_Pending_Sector
> > > 198 Offline_Uncorrectable
> > >
> > > Its been my experience that occasionally a few sectors will fail
> > > and
> > > become reallocated and it causes little harm. If you see 10-20+
> > > sectors
> > > fail at a time then the drive's failure is close at hand and you
> > > should
> > > replace the drive ASAP.
> > >
> > > Hope this helps.
> > >
> > > Scott LeFevre
> > >
> > >
> > > On Mon, 2012-04-30 at 21:16 +0200, Roy Sigurd Karlsbakk wrote:
> > >
> > > > Hi all
> > > >
> > > > I know this question isn't strictly an openindiana question, but
> > > > I
> > > > want to give it a shot…
> > > >
> > > > I have a few servers with some 300 drives in total with Icinga
> > > > (a
> > > > Nagios fork) monitoring the zpool and smartctl health. It
> > > > sometimes
> > > > happens that smartctl reports a bad drive, and it's replaced. A
> > > > few
> > > > times I've seen smartctl report a bad drive, and then, after a
> > > > day
> > > > or two, it suddenly changes its mind, reporting a perfectly
> > > > healthy
> > > > drive.
> > > >
> > > > Has anyone see this happen?
> > > >
> > > > Vennlige hilsener / Best regards
> > > >
> > > > roy
> > > > --
> > > > Roy Sigurd Karlsbakk
> > > > (+47) 98013356
> > > > roy at karlsbakk.net
> > > > http://blogg.karlsbakk.net/
> > > > --
> > > > I all pedagogikk er det essensielt at pensum presenteres
> > > > intelligibelt. Det er et elementært imperativ for alle pedagoger
> > > > å
> > > > unngå eksessiv anvendelse av idiomer med fremmed opprinnelse. I
> > > > de
> > > > fleste tilfeller eksisterer adekvate og relevante synonymer på
> > > > norsk.
> > > >
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> >
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-- 
Vennlige hilsener / Best regards

roy
--
Roy Sigurd Karlsbakk
(+47) 98013356
roy at karlsbakk.net
http://blogg.karlsbakk.net/
--
I all pedagogikk er det essensielt at pensum presenteres intelligibelt. Det er et elementært imperativ for alle pedagoger å unngå eksessiv anvendelse av idiomer med fremmed opprinnelse. I de fleste tilfeller eksisterer adekvate og relevante synonymer på norsk.