From mboxrd@z Thu Jan 1 00:00:00 1970 MIME-Version: 1.0 In-Reply-To: References: <20141118132939.B91F11B5BC9@wolfman.devio.us> <25fc57d2bb0b43bbcf957577501c1201@posteo.de> <20141118154208.Horde.-lW_HrLDkU9P79z9xJFH7w9@ssl.eumx.net> <445f93dc54035581c54b6fa19b96f750@posteo.de> <1a3157d28f8065b3a7072365eb88e464@hamnavoe.com> Date: Fri, 21 Nov 2014 08:34:11 +0200 Message-ID: From: Harri Haataja To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> Content-Type: multipart/alternative; boundary=089e0129456efa67bd050858a135 Cc: Richard Miller <9fans@hamnavoe.com> Subject: Re: [9fans] running plan9 : an ideal setup? Topicbox-Message-UUID: 2d104686-ead9-11e9-9d60-3106f5b1d025 --089e0129456efa67bd050858a135 Content-Type: text/plain; charset=UTF-8 On 19 Nov 2014 23:54, "Tom Ivar Helbekkmo" wrote: > Richard Miller <9fans@hamnavoe.com> writes: > > > After a bit less than a year, the SD card suffered a catastrophic > > failure. When I say catastrophic, I mean I can't find any meaningful > > data anywhere in the first 120MB or so of /dev/sdM0/data ... just > > not-quite-random looking garbage. > > Could have been just the normal "SD card used up" situation. They don't > last forever, and to get a reasonable life time you have to a) not buy > too cheap, and b) not write to it more than you have to. Under Unix, > point b means mounting with noatime and nodiratime options. > > Some specifics here: http://en.wikipedia.org/wiki/Wear_leveling Raspi in particular also seems to be very sensitive to power quality. Often the symptom of overloaded power supply is a crash and an unbootable SD card. Frequent backups of the card are probably a good idea in any case. --089e0129456efa67bd050858a135 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

On 19 Nov 2014 23:54, "Tom Ivar Helbekkmo" <tih@hamartun.priv.no> wrote: > Richard Miller <9fans@hamnavo= e.com> writes:
>
> > After a bit less than a year, the SD card suffered a catastrophic=
> > failure.=C2=A0 When I say catastrophic, I mean I can't find a= ny meaningful
> > data anywhere in the first 120MB or so of /dev/sdM0/data ... just=
> > not-quite-random looking garbage.
>
> Could have been just the normal "SD card used up" situation.= =C2=A0 They don't
> last forever, and to get a reasonable life time you have to a) not buy=
> too cheap, and b) not write to it more than you have to.=C2=A0 Under U= nix,
> point b means mounting with noatime and nodiratime options.
>
> Some specifics here: http://en.wikipedia.org/wiki/Wear_leveling

Raspi in particular also seems to be very sensitive to power= quality. Often the symptom of overloaded power supply is a crash and an un= bootable SD card.

Frequent backups of the card are probably a good idea in any= case.

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