Date: Sat, 4 Mar 2017 07:01:25 -0600 From: "Matthew D. Fuller" <fullermd@over-yonder.net> To: Kurt Jaeger <lists@opsec.eu> Cc: Matthias Apitz <guru@unixarea.de>, freebsd-ports@freebsd.org Subject: Re: running poudriere with 8 builders Message-ID: <20170304130125.GE64417@over-yonder.net> In-Reply-To: <20170304115740.GG13006@home.opsec.eu> References: <20170304110857.GA2793@c720-r292778-amd64> <d1c913cc-b5ae-42be-bd8c-5fba8e14902f@unixarea.de> <20170304115740.GG13006@home.opsec.eu>
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On Sat, Mar 04, 2017 at 12:57:40PM +0100 I heard the voice of
Kurt Jaeger, and lo! it spake thus:
>
> /pou is on an Samsung SSD 840 EVO 250GB:
>
> smartctl says:
>
> 9 Power_On_Hours 0x0032 091 091 Always - 41885
> 12 Power_Cycle_Count 0x0032 099 099 Always - 8
> 177 Wear_Leveling_Count 0x0013 083 083 Always - 199
>
> The Wear_Leveling_Count shows that it's probably beyond the spec
> already 8-}
Actually, I'm pretty sure it means the opposite 8-}
It's my understanding that the "Raw" value on them is pretty much
roughly the actual count of levelled drive writes, and the cooked
"Value" (/worst, though that doesn't make a difference on that
attribute) winds up basically meaning "percent of rated life left"[0].
So you've got ~200 drive writes, and have used about 17% of its life.
On a 250GB 840 Evo I have, in somewhat easier use than being
poundriered senseless:
ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE
177 Wear_Leveling_Count PO--C- 095 095 000 - 57
It's in a mirror with a similarly sized MX100, which (with its
different attributes; can't be consistent, y'know) says
202 Percent_Lifetime_Used P---CK 095 095 000 - 5
which agrees; I've only got 19/20ths of their lifespan to go before I
gotta cough up umpty-dozens of dollars to replace them.
[0] For most SMART attributes, the cooked 'value' actually starts at
100 and counts down, with the Threshold level being where it
starts claiming to be deeply unhappy.
--
Matthew Fuller (MF4839) | fullermd@over-yonder.net
Systems/Network Administrator | http://www.over-yonder.net/~fullermd/
On the Internet, nobody can hear you scream.
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