[sudo-access] front door computer disk backup

Anthony Di Franco di.franco at gmail.com
Mon Sep 24 16:44:46 PDT 2018

I would be happy to have a look at this. If we deem it adequate, I could
just write a cron job to rsync everything to a remote server and perhaps
also a spare local disk, or the like. I would need a quick primer on how
the thing is currently set up. I'll be around Wednesday evening so that
would be a convenient time for me to have a look at this.

On Wed, Sep 19, 2018 at 12:46 PM Jake <jake at spaz.org> wrote:

> I notice sometimes when i log into the front door computer that the command
> prompt is showing that the disk is in read-write mode.  I'm worried that
> if too
> much activity happens to the eMMC disk of the beaglebone black that runs
> the
> door, that we might have a disk failure.
> either way I think we should have a backup of the door computers'
> filesystem,
> maybe an image of the whole disk, that we can automatically maintain so
> that if
> it ever gets corrupted or flooded or whatever we can easily replace it.
> is anyone on this list willing to take that on?  I'm not an expert at this
> and
> I feel like others might have an easier time with it.
> also I think we should consider migrating the entire system to an SD card
> instead of using the soldered-on eMMC chip on the beaglebone (which
> eventually
> dies and ruins everythinng)
> here's the disk situation:
> /dev/disk/by-uuid/6b3e6ea0-eba5-402a-ae7a-ec2c7555affb on / type ext4
> (6b3e6ea0-eba5-402a-ae7a-ec2c7555affb == mmcblk1p2 AKA the eMMC)
> /dev/mmcblk1p1 on /boot/uboot type vfat
> /dev/mmcblk0p1 on /mnt/sd_card type ext4 (this is the actual sd card)
> the SDcard that's in there now is empty so it seems like someone could try
> copying the system to it (whether for backup or to boot from it) but I
> have no
> idea how to make a BBB boot from SDcard instead of built-in eMMC although
> i'm
> sure it's no big deal...
> anyway this is just a heads-up so that we make it easy to fix in case
> something
> happens to the door system disk.  It's been extremely reliable for years
> but we
> can't take that for granite* and it's important infrastructure.
> -jake
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