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I actually contemplated both From: Jim Jackson <> To: Sent: Sunday, September 25, 2011 12:19 PM Subject: Re: [ts-7000] Re: TS-7553 MicroSD longevity 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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