Package: freedombox-setup Version: 0.9.1 Severity: normal -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
We are some cases of I/O errors and filesystem corruptions: 1) After running Lime2 for several months, I have noticed that the btrfs filesystem development many errors. Although the device suffered many power outages (due to unreliable power supply in the area), the corruptions are not supposed to happen due to the COW design of btrfs. In its final days, the kernel kept throwing btrfs stack traces and I had to copy of the files to another disk. At first I thought this was SD card going bad even though it is a high quality SD card (Samsung EVO). When I ran badblocks with write checks (several passes) on the card, there were no bad blocks found. I wrote a fresh image and it is now working fine with same SD card. I suspect software problem. 2) Stephen Mahood reported experiencing multiple SD cards developing corruptions on multiple beaglebone black devices while trying to install/use ownCloud. We assumed that it was a bug in the old kernel. He is now using the latest nightly images for new kernel. 3) I investigated Bug #819199. It turns out that libpam_abl uses libdb5.3 (Berkley DB) which is now a resilient database with ACID compliance. Power outages should not have affected it. I suspect it to be this problem. 4) Another user, stueja, is reporting (https://github.com/freedombox/Plinth/issues/463) package cache corruption along with I/O errors writing to the cache. The only thing I suspect that can create such a problems in FreedomBox is the laptop_mode kernel parameter combined with btrfs filesystem. This is only a guess but I suggest removing it until this bug is reliably solved. Here are some things to think about: - - laptop_mode is meant to save power by spinning down the rotating disks and keeping them that way for longer. I could not find evidence that this helps with SD card power usage or that SD card power usage is significant enough. Further, most of our users run their FreedomBox on batter power. - - The recommended way to deal with this kernel parameter is using a script which is now part of laptop-mode-tools package which is responsible for saving powers in many other ways. However, it works with system having ACPI which is not the case with most of our hardware. - - If a user installs FreedomBox on a laptop, they could choose to install the laptop-mode-tools package the usual way without FreedomBox automatically doing it. - - laptop_mode may lead to several minutes of data loss in case of a power cut to the devices. This should not usually lead to filesystem corruptions though. This is a reasonable compromise that need to run for long time on battery but on servers, this may not be the right thing to do. - - IIUC, laptop_mode requires special file system support. I see that support in ext3/ext4 etc. but I haven't found any references to btrfs supporting it. - -- System Information: Debian Release: stretch/sid APT prefers unstable APT policy: (500, 'unstable') Architecture: amd64 (x86_64) Foreign Architectures: i386, armhf Kernel: Linux 4.5.0-2-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages freedombox-setup depends on: ii apache2 2.4.20-2 ii augeas-tools 1.2.0-0.3 ii avahi-daemon 0.6.32~rc+dfsg-1 ii avahi-utils 0.6.32~rc+dfsg-1 ii bridge-utils 1.5-9 pn checkinstall <none> pn devio <none> ii dialog 1.3-20160424-1 pn dnsmasq <none> ii dnsutils 1:9.10.3.dfsg.P4-10 ii dosfstools 4.0-2 pn etckeeper <none> ii firewalld 0.4.1.2-1 pn haveged <none> ii hostname 3.17 ii htop 2.0.1-1 pn iftop <none> ii iptables 1.6.0-2 ii iputils-ping 3:20150815-2 ii isc-dhcp-client 4.3.4-1 pn libnss-gw-name <none> ii libnss-mdns 0.10-7 ii libnss-myhostname 230-1 ii libpython2.7-stdlib [python-argparse] 2.7.11-9 ii locales 2.22-9 pn locales-all <none> ii lsof 4.89+dfsg-0.1 pn lua-sec <none> pn macchanger <none> ii monkeysphere 0.37-3 ii net-tools 1.60+git20150829.73cef8a-2 ii ntp 1:4.2.8p7+dfsg-4 ii openssh-server 1:7.2p2-5 ii parted 3.2-15 pn plinth <none> ii psmisc 22.21-2.1+b1 ii python-augeas 0.5.0-1 ii python-beautifulsoup 3.2.1-1 ii python-bjsonrpc 0.2.0-2 ii python-docutils 0.12+dfsg-1 ii python-lxml 3.6.0-1 pn python:any <none> pn resolvconf <none> ii ssl-cert 1.0.37 ii sudo 1.8.15-1.1 ii tcpdump 4.7.4-1+b1 pn uaputl <none> ii vim-tiny 2:7.4.1829-1 ii wget 1.17.1-2 pn zile <none> Versions of packages freedombox-setup recommends: pn batctl <none> pn pagekite <none> pn rfkill <none> ii wireless-tools 30~pre9-11 freedombox-setup suggests no packages. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJXUxbSAAoJEDbDYUQMm8lxXC0P/3qrjlOhaSCMjlj6KutML9nC AxLY5G9597F+YK6VJNpfMfqpXi1PmCB5hZI09qfkgeI6rJcfZknV6uhSwU/RHZoE vASReNDsiVHcNOiP+O12y06BViR1DpKa4xXPPR9Jzfc3dOoYB1YHdQFiAG78moPi L958ajO9xCOunFzB6xh7Cf4RA/fnG99j07yJ1/5L10Sb/JXo3uBwufXba2j+C01Z K2ZrzaQHuUWs7Nf1e81KIzR5cXFOK33ReCmjdvcJeSvynltvooG490GEoNyjLwim tG+8iOa7g2ISAxtJ0W0cDMgRbVCzgAN7EDuoJmjKBCW0wZkhfwVeWVpdyn3TZnhn Mck70g+uejOooUr8cXvOo1P3EsjmkyS1HXSPq1c83dZk+U3zv2jU2kdj71PPJdIM vuAwBtRJU7+A+fgfFdyXGWSZWwXhFGHzB5UKCh2ibuWKDaC4IOID+g8rqOcYoIaK qL7xFezEws3Y6fI6I4hSLWufFlsi0e30TDNFs19MdOPBtfPtJJLALxL1y8Bwk91I KmLKDVGIOcQFjNq/Xp0fzlKwNNUNEMQRMHDH3sLd2PxGfg2aZe8IGQCVATkCkstp wBE45lZaDC/L7clhj8PiKaQhYuL802lQCmiq8gj7anmIRT2kY79IOKw9XQ1H7R5R /NnptxN6q2oGYHhfkT3U =KzUB -----END PGP SIGNATURE-----
