On 02-12-18 13:01, Alessandro Selli wrote: > > > Il 02/12/18 11:41, Edward Bartolo ha scritto: >> Hi everyone. >> >> Recently I have been using a Raspberry Pi 3B, obviously powered with >> Devuan, to run as music player. Restarting it yesterday, I was >> dismayed to discover it would not boot properly anymore, with long >> lists of errors complaining about not being able to write to the SD >> CARD. The latter is not full. Examining it I found it is now >> permanently marked as read-only. Searching online for an explanatory >> cause, I learnt this occurs when the maximum number of write cycles is >> reached. So, the SD CARD, although brand new is now to be thrown away. >> >> The purpose of this email is to ask how to radically minimized write >> cycles to the SD CARD when I run Devuan for Raspberry Pi 3. I found a >> how-to which uses /tmp fs for frequently modified system files, but >> the user uses systemd and I do not want to have that. >> >> Can any good soul help, please? >> Thanks. > > > All you need to do is putting this line in /etc/fstab: > > tmpfs /tmp tmpfs defaults,mode=1777 0 0 > > > Then you go into runlevel 1, erase everything in /tmp, mount it and > go back to runlevel 2 (or what you use on your RP3B). > > Others have already suggested more ways you can reduce writes to > your filesystems. I would add, if your device's power source is > backed by a battery and you use an ext4 filesystem, to format or mount > it with: > > 1. journal disabled (nointegrity); > 2. barriers disabled (nobarrier or barrier=0). > > > These mount options will increase the chance of data loss and > filesystem corruption in the case of an abnormal filesystem close > (system crash or sudden power loss), but significantly decrease the > number of write operations on the ext4 filesystem during regular > operation. > > > > Alessandro > > > > -- > Alessandro Selli <alessandrose...@linux.com> > VOIP SIP: dhatarat...@ekiga.net > Chiave firma e cifratura PGP/GPG signing and encoding key: > BA651E4050DDFC31E17384BABCE7BD1A1B0DF2AE
If you disable journalling on ext4 you can just as well mount it with ext2 afaik. Grtz Nick
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