Question

fsck - read only file system

  • Posted on December 5, 2013
  • paul2Asked by paul2

For the second time in 3 months for vm went down - a fsck was necessary. No warning. Just down.

Has this happened to anyone else? What do you do to mitigate the problem? Has support been helpful?

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ray: have you opened up a support ticket?

Been experiencing the same thing, only thing I can pin it down to is a lot of read/writes, exact same operations I carry out daily on multiple VPS machines with other companies and my own servers. This is the second time it’s happened in a month so at least I have been backing up daily just in case. I’ve done a lot of sysadmin work and development and this isn’t normal, there’s nothing that should’ve caused the disk to remount itself as read only.

Here is a follow-up - it may be a little long - maybe it will help others make informed decisions regarding using DO or VMs in general. <br> <br>So, ultimately, at the end of the day, my server became hosed and I was forced to provision another one to bring my app back up. It was down for 16*+ hours. We (the owner who pays me) got 80 bucks to compensate and some friendly guesses regarding what might of happened - ‘probably because I had shut down improperly’ - unlikely because I simply had not shutdown. More likely, after doing some research, the need for fsck was caused by faulty (or faltering) hardware - or faulty disk mounting (of SSDs). Would I bet my life on it? No. They did mention no others had experienced the same problem - which would blow that theory out of the water. Which is interesting since they have a kernel mode specifically for booting and running fsck. <br> <br>In any case this was the second time in 3 months that my app was left down. I’ve been running this same app for years without issues both on hardware(a mac mini which had a hybrid persistance hd/ssd, which I do miss sometimes) and on other VMs. <br> <br>I’ve moved my app server to Linode - leaving my asset host in place (which thank goodness also had backups from the server that was hosed). I should have done this before to mitigate risk anyway. <br> <br>So my lesson, learned: <br>1) Make damn sure you are making backups. Do them yourself the old fashioned cron/rsync way. Use 2+ DCs. (yea, I had done this) <br>2) Have a fallback. Like I set I got set up in Linode - and kept my DO asset host/backup andI might come back someday and setup an app server again - and fail over to it if Linode craps out <br>4) Experiment with ‘managed’ plans. It might be worth it. It might have helped in this case <br>5) Reboot and run fsck periodically - investigate what it finds, examining specifically for possible faulty sectors/drives/mounts <br> <br>My theory: SSDs are awesome. But may not be ideal for servers (that write often). <br> <br>I won’t be severing ties completely with DO, but I won’t be recommending them either. <br> <br>Hope that helps someone. <br> <br>Paul <br>