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Re: [ts-7000] Re: TS-7553 MicroSD longevity

To:
Subject: Re: [ts-7000] Re: TS-7553 MicroSD longevity
From: Jim Jackson <>
Date: Sun, 25 Sep 2011 17:19:24 +0100 (BST)


On Sun, 25 Sep 2011, jongsoo_k wrote:

> Hi Walter or anyone
>
> I am having nightmare with TS7500.
> Many files in my SD card becomes read-only in 3- 4 weeks.
> Finally apache stops and nothing seems working...
>
>
> I would like to implement "noatime".

easy just add it to the mount options in /etc/fstab

>
> My system also has battery-back-up.  It detects power off and the system 
> shutdowns smoothly.
> I want to try ext2 based on you comment since my system has battery.
>
> My question is how to convert Ext3 to Ext2. The Debian package from TS is 
> Ext3.  
>
>
> Thanks
>
> Jongsoo
>
>
> --- In  Jim Jackson <> wrote:
> >
> >
> >
> >
> > On Sun, 15 May 2011, walter marvin wrote:
> >
> > > My info is infinite reads but limited writes this means that you must use
> > > a journaling file system or build in track remapping
> >
> > Not sure that makes sense. In fact a journalling file system INCREASES
> > writes - first to write the update details to the journal, then to
> > do the updates, then the make the update done in the journal.
> >
> > The use of a journalling file system helps if the system is likely
> > to suffer unexpected power loss etc. When it comes back up, any uncompleted
> > transactions can be verified and completed, and there is usually no need
> > for a very lengthy file system integrety check.
> >
> > As an engineer it's up to you decide the trade offs and decide which is
> > more important. My own systems have battery backup, allowing graceful
> > shutdown, so I use ext2 (mounted with "noatime") to reduce writes. If I
> > didn't use battery backup, I'd use ext3, and stand the write hit to give me
> > better file system integrety.
> >
> > >
> > > --- On Sun, 5/15/11, parkranger_dan <> wrote:
> > >
> > > From: parkranger_dan <>
> > > Subject: [ts-7000] TS-7553 MicroSD longevity
> > > To: 
> > > Date: Sunday, May 15, 2011, 1:37 PM
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > ? 
> > >
> > >
> > >
> > >  
> > >
> > >
> > >    
> > >      
> > >      
> > >       Hey guys.  I posted awhile back when having some functionality 
> > > issues with a TS-7200 and realized the 7553 was really the platform I 
> > > should have been working with from the get-go. 
> > >
> > >
> > >
> > > Sweet little box this 7553.  I've gotten all my software ported over and 
> > > it's working perfect.  After only a couple weeks with it, I think I'm 
> > > ready for deployment. 
> > >
> > >
> > >
> > > We'll be preparing quite a few of these little guys.  Having the ability 
> > > to insert a pre-imaged MicroSD, set one jumper, and run one command (rm 
> > > linuxrc; ln -sf /linuxrc-sdroot /linuxrc; save) to change the boot is 
> > > very attractive in terms of quick deployment, and easy field upgrade 
> > > (send customer a new MicroSD card, done!).
> > >
> > >
> > >
> > > One question I had was in regard to the longevity of these little MicroSD 
> > > cards, and their resilience to repeated power loss.
> > >
> > >
> > >
> > > Customers will not have the ability to shutdown nicely, power will always 
> > > be removed to turn off.  I based my image from the latest.dd image 
> > > available from the Technologic website, which if I remember correctly is 
> > > formatted ext3. 
> > >
> > >
> > >
> > > Has anyone had any experience with a similar setup?  How are the boxes 
> > > holding up, and have the MicroSD cards been lasting? 
> > >
> > >
> > >
> > > I've been also pondering making use of the xnand drive with a custom 
> > > busybox that includes the compiled apps i need and just script the 
> > > flashing process to ease prep/deployment.  I know bootup time would be 
> > > significantly better than my current 1 minute timeframe, and resilience 
> > > would be better.  Downside would be that I lose the ability to do remote 
> > > software updates.  Anyway, I have yet to break ground on that idea, or 
> > > even wrap my brain around how that's done.
> > >
> > >
> > >
> > > Thanks!
> > >
> > > Dan
> > >
> > > 
> > >
> > >
> > >
> > >
> > >
> > >    
> > >     
> > >
> > >    
> > >    
> > >
> > >
> > > 
> > >
> > >
> > >
> > >  
> > >
> > >
> > >
> > >
> >
>
>
>

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