<div dir="ltr">xfs. Fiddling with it. It's completely possible/plausible it could be a bad superblock<div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Apr 26, 2016 at 2:32 PM, Charles Burton <span dir="ltr"><<a href="mailto:charles.d.burton@gmail.com" target="_blank">charles.d.burton@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Oh, what filesystem is it too? I know xfs has special tools for dealing with it.<br></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Apr 26, 2016 at 8:31 PM, Charles Burton <span dir="ltr"><<a href="mailto:charles.d.burton@gmail.com" target="_blank">charles.d.burton@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>This was done on Fedora 23 with LVM for everything except /boot as well. Dump runs on the VFS layer not the device layer, LVM is technically device layer think of it like this:<br><br></div>file -> filesysystem -> lvm -> device<br><br></div>Dump operates at the filesystem layer, so getting a bad superblock means that you likely actually have a bad superblock. Try running fsck against that filesystem and see what you get.<br><div><div><br></div></div></div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Apr 26, 2016 at 8:19 PM, Charles Burton <span dir="ltr"><<a href="mailto:charles.d.burton@gmail.com" target="_blank">charles.d.burton@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>If you want you can also add compression:<br><br></div>dump -0u -f - /home/mbean | gzip > /mnt/mbean.dump.gz<br></div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Apr 26, 2016 at 8:16 PM, Charles Burton <span dir="ltr"><<a href="mailto:charles.d.burton@gmail.com" target="_blank">charles.d.burton@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>I just verified that it works fine on LVM. It should look like this:<br><br></div>dump -0u -f /mnt/mbean.dump /home/mbean<br><br></div>The /mnt/mbean.dump is the destination file to dump to. The /home/mbean is filesystem you wish to dump from. <br></div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Apr 26, 2016 at 8:10 PM, Mike Bean <span dir="ltr"><<a href="mailto:beandaemon@gmail.com" target="_blank">beandaemon@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Sure looks that way. Works on physical devices, didn't seem to care for my syntax. It's dump -0u -f (destination) (source)?<div><br></div><div><br></div></div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Apr 26, 2016 at 2:08 PM, Charles Burton <span dir="ltr"><<a href="mailto:charles.d.burton@gmail.com" target="_blank">charles.d.burton@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>It doesn't work quite like you're thinking. Dump doesn't care about LVM, not at least as far as I know. Try:<br><br></div>dump -0u -f /mnt/mbean /home/mbean<br></div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Apr 26, 2016 at 8:04 PM, Mike Bean <span dir="ltr"><<a href="mailto:beandaemon@gmail.com" target="_blank">beandaemon@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Thanks for the tip. At least at first blush it looks like I can't use dump and restore. They only work on devices and not on logical volumes. At least not on my logical volumes (I'm getting bad magic number in super-block.) I think I'm going to play with it a little while longer, see if I can figure out if it really can't handle or if I'm just PEBKAC. Could also be this box. I'm testing it on a box that I don't really care if it breaks<div><br></div><div><div>dump -0u -f /mnt/mbean /dev/mapper/rootvg-homelv</div><div> DUMP: Date of this level 0 dump: Tue Apr 26 14:00:16 2016</div><div> DUMP: Dumping /dev/mapper/rootvg-homelv (/home) to /mnt/mbean</div><div>/dev/mapper/rootvg-homelv: Bad magic number in super-block while opening filesystem</div><div> DUMP: The ENTIRE dump is aborted.</div></div><div><br></div><div>Mike B</div></div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Apr 25, 2016 at 12:34 PM, Chris Fedde <span dir="ltr"><<a href="mailto:chris@fedde.us" target="_blank">chris@fedde.us</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">I say this every time backups get mentioned but I have to say it again. I like dump. Dump and restore are a perfect set of tools that solve the backup problem neatly and flexibly. And so far have not let me down for either fat finger recovery or for full disk recovery. </p>
<p dir="ltr">I find it silly that this tool that is integrated with the OS and woks so well is overlooked by everyone. Even by the certification folks.</p>
<p dir="ltr">Let me say it again. I like dump. Maybe I need to write up a blog article or something.</p><div><div>
<div class="gmail_quote">On Apr 19, 2016 6:33 PM, "Mike Bean" <<a href="mailto:beandaemon@gmail.com" target="_blank">beandaemon@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Yeah, I know ; )<br><br></div>Mike B<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Apr 19, 2016 at 3:49 PM, David L. Anselmi <span dir="ltr"><<a href="mailto:anselmi@anselmi.us" target="_blank">anselmi@anselmi.us</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span>Mike Bean wrote:<br>
> Theorhetically yes, and we did that, but as predicted, since I #1 noticed<br>
> the box was down and #2 attempted to fix it, I therefore have ownership of<br>
> it now. Have to look into a cheap scale able method to get actual backups<br>
> and stop depending on snap shots. I suppose I could just back it up. But<br>
> it's only a matter of time before someone notices the Jenkins box has<br>
> backups and complains that all the other boxes don't.<br>
<br>
</span>You need to get a new job. Life's too short...<br>
<br>
And for everyone else, this is an example why you vote against whatever the government wants to<br>
spend money on.<br>
<br>
Dave<br>
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