Re: pi vs swap on flash
On Thursday 13 July 2017 12:52:51 Alan Corey wrote:
> Try touch /var/swap so one exists? Actually I think you're supposed
> to dd a few gigs from /dev/zero in there. I just left the swap file
> alone, the reason being that my swap partition is on the end of the
> drive which is going to cause head thrashing if it gets used a lot.
> So some swap space near where everything else is is good.
> Does your /boot/cmdline.txt still refer to the SD card?
The one on the sd card does not.
> Mine now says
> root=/dev/sda2 The one on the hard drive that is.
> On 7/13/17, Gene Heskett <email@example.com> wrote:
> > On Thursday 13 July 2017 12:00:43 Alan Corey wrote:
> >> Mine looks like:
> >> proc /proc proc defaults 0 0
> >> /dev/sda1 /boot vfat defaults 0 2
> >> /dev/sda2 / ext4 defaults,noatime 0 1
> >> /dev/sda3 none swap sw 0 0
> > Reading the manpage, I used:
> > /dev/sda2 none swap sw,defaults
> > And after a reboot, htop shows swap at 2099 megs. That includes the
> > 100 meg swapFILE in /var. To turn that off:
> > sudo dphys-swapfile swapoff
> > or sudo dphys-swapfile swapon
> > I just turned it off. That I think can be put into /etc/rc.local as
> > it runs as root. But I can't make that work, without or with a sudo
> > in front of it. So where can I put it?.
> > I turned it off, then removed /var/swap. Won't reboot. WTH? THere
> > isn't anything in fstab but what I added, and nothing in
> > /boot/config.txt or cmdline.txt about swap. I can recover, but the
> > most recent edits in the linuxcnc tree haven't been backed up,
> > damn!!!!! I'll try a full powerdown before I swap cards to begin the
> > recovery.
> >> And when you reboot you should see it in top as an increase in
> >> swap.
> >> The only downside I've found is that piclone doesn't know to ignore
> >> it. I put mine at the end of 320 GB, now I can't use piclone for
> >> backups to SD anymore. But there's been discussion that swap will
> >> wear out an SD fast, they're rated by read/write cyccles.
> > Eggzakly. :)
> > Thanks Alan.
> > Cheers, Gene Heskett
> > --
> > "There are four boxes to be used in defense of liberty:
> > soap, ballot, jury, and ammo. Please use in that order."
> > -Ed Howdershelt (Author)
> > Genes Web page <http://geneslinuxbox.net:6309/gene>
Cheers, Gene Heskett
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
+-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>