Orbi+Voxel external drive unmounted?

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mith_y2k

Regular Contributor
Two strange things happened today (or maybe in the last couple of days). Yesterday my Mac complained my shared drive got disconnected, but I didn't bother too much since I had the Mac sleeping for a couple of days and I assumed it just got disconnected. Today our power went out, but fortunately the UPS kept the internet running. Concerned about the Orbi I ssh'ed in, checked the external drive and noticed that it was not mounted. I checked a few things and I can't fully get my head around on what has been going on. These are the breadcrumbs I found.

It looks like the drive should be mounted:
Code:
/dev/sda1 on /tmp/mnt/sda1 type ext4 (rw,nodev,relatime,data=writeback)

Full mount command:
Code:
[email protected]:~# mount
rootfs on / type rootfs (rw)
/dev/root on /rom type squashfs (ro,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,noatime)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,noatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noatime)
overlayfs:/tmp/overlay on / type overlayfs (rw,relatime,lowerdir=/,upperdir=/tmp/overlay)
tmpfs on /dev type tmpfs (rw,nosuid,relatime,size=512k,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,mode=600)
debugfs on /sys/kernel/debug type debugfs (rw,noatime)
/dev/sda1 on /tmp/mnt/sda1 type ext4 (rw,nodev,relatime,data=writeback)
/dev/mmcblk0p31 on /tmp/dal type ext4 (rw,relatime,data=ordered)
/dev/mmcblk0p34 on /tmp/mnt/ntgr/https_cert type ext4 (rw,relatime)
/dev/mmcblk0p27 on /tmp/device_tables type ext4 (rw,relatime,data=ordered)

I checked /var/log/messages and dmesg and found nothing interesting.

ls shows nothing, which was the first thing that made me think the drive wasn't actually mounted:
Code:
[email protected]:~# ls -l /mnt/sda1/
[email protected]:~#

Now here is an interesting one, fdisk tells me the external drive is not sda as usual, but actually sdb:
Code:
[email protected]:~# fdisk -l
[...]

Disk /dev/sdb: 4.55 TiB, 5000947302400 bytes, 9767475200 sectors
Disk model: My Passport 2627
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: F7791D37-B3F3-4BF7-BE41-1D6290952BC9

Device     Start        End    Sectors  Size Type
/dev/sdb1   2048 9767475166 9767473119  4.5T Linux filesystem

Trying to mount /dev/sda1 fails, as expected. I tried mounting sdb1 read-only and it has all my files. I unmounted, ran fsck and found a bunch of inodes that needed fixing. I fixed them and re-mounted read-write and it looks fine.

My Orbi has been up for 65 days and change and I am 100% sure the drive was mounted and working 2 or 3 days ago. I have proof of this because for example my smb.conf file has been copied from the overlay to the /etc/samba directory.

Lots of questions on my mind:
  • why is it sdb and not sda?
  • When did it get unmounted? I know for sure it was mounted and working 2 or 3 days ago
  • Why was it unmounted? It seems like it wasn't a clean unmount, where can I find some logs?

Related question: what's the best way to reboot the Orbi without causing a non-clean unmount? Should I always manually umount and THEN reboot?
 

HELLO_wORLD

Very Senior Member
Two strange things happened today (or maybe in the last couple of days). Yesterday my Mac complained my shared drive got disconnected, but I didn't bother too much since I had the Mac sleeping for a couple of days and I assumed it just got disconnected. Today our power went out, but fortunately the UPS kept the internet running. Concerned about the Orbi I ssh'ed in, checked the external drive and noticed that it was not mounted. I checked a few things and I can't fully get my head around on what has been going on. These are the breadcrumbs I found.

It looks like the drive should be mounted:
Code:
/dev/sda1 on /tmp/mnt/sda1 type ext4 (rw,nodev,relatime,data=writeback)

Full mount command:
Code:
[email protected]:~# mount
rootfs on / type rootfs (rw)
/dev/root on /rom type squashfs (ro,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,noatime)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,noatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noatime)
overlayfs:/tmp/overlay on / type overlayfs (rw,relatime,lowerdir=/,upperdir=/tmp/overlay)
tmpfs on /dev type tmpfs (rw,nosuid,relatime,size=512k,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,mode=600)
debugfs on /sys/kernel/debug type debugfs (rw,noatime)
/dev/sda1 on /tmp/mnt/sda1 type ext4 (rw,nodev,relatime,data=writeback)
/dev/mmcblk0p31 on /tmp/dal type ext4 (rw,relatime,data=ordered)
/dev/mmcblk0p34 on /tmp/mnt/ntgr/https_cert type ext4 (rw,relatime)
/dev/mmcblk0p27 on /tmp/device_tables type ext4 (rw,relatime,data=ordered)

I checked /var/log/messages and dmesg and found nothing interesting.

ls shows nothing, which was the first thing that made me think the drive wasn't actually mounted:
Code:
[email protected]:~# ls -l /mnt/sda1/
[email protected]:~#

Now here is an interesting one, fdisk tells me the external drive is not sda as usual, but actually sdb:
Code:
[email protected]:~# fdisk -l
[...]

Disk /dev/sdb: 4.55 TiB, 5000947302400 bytes, 9767475200 sectors
Disk model: My Passport 2627
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: F7791D37-B3F3-4BF7-BE41-1D6290952BC9

Device     Start        End    Sectors  Size Type
/dev/sdb1   2048 9767475166 9767473119  4.5T Linux filesystem

Trying to mount /dev/sda1 fails, as expected. I tried mounting sdb1 read-only and it has all my files. I unmounted, ran fsck and found a bunch of inodes that needed fixing. I fixed them and re-mounted read-write and it looks fine.

My Orbi has been up for 65 days and change and I am 100% sure the drive was mounted and working 2 or 3 days ago. I have proof of this because for example my smb.conf file has been copied from the overlay to the /etc/samba directory.

Lots of questions on my mind:
  • why is it sdb and not sda?
  • When did it get unmounted? I know for sure it was mounted and working 2 or 3 days ago
  • Why was it unmounted? It seems like it wasn't a clean unmount, where can I find some logs?

Related question: what's the best way to reboot the Orbi without causing a non-clean unmount? Should I always manually umount and THEN reboot?
Maybe by creating a wrapper for the reboot command that first unmount, then calls the original reboot?
 
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