I've encountered some weird behavior. Just upgraded from Ubuntu 12.04 to 16.04. During the first restart, the little splash window of orange-white dots hangs forever and then fails to a command line. I tried all of the various options available and then I noticed the label for my external HDD was mentioned at one point in some of the text going by so I plugged it back in and immediately, the machine started up again...
The external HDD was NOT plugged in when the upgrade was installed.
Any clues about how to fix this problem. It's a hassle because I share this HDD with other folks and I don't want to always have it with me.
===info requested by Al. Thanks for your help!
sudo blkid
/dev/sda1: LABEL="SYSTEM_DRV" UUID="A2F4028AF40260C1" TYPE="ntfs" PARTUUID="cf479f9e-01" /dev/sda2: LABEL="Windows7_OS" UUID="FE980B0E980AC4DD" TYPE="ntfs" PARTUUID="cf479f9e-02" /dev/sda4: LABEL="Lenovo_Recovery" UUID="BC2E01E12E019614" TYPE="ntfs" PARTUUID="cf479f9e-04" /dev/sda5: LABEL="New Volume" UUID="66F8DF30F8DEFCED" TYPE="ntfs" PARTUUID="cf479f9e-05" /dev/sda6: UUID="c7d3764e-d769-427b-8525-3ddb2b868e1e" TYPE="ext4" PARTUUID="cf479f9e-06" /dev/sda7: UUID="d4da275c-f316-4067-a31f-c9cd86cb053f" TYPE="swap" PARTUUID="cf479f9e-07" /dev/sdb1: LABEL="mta1" UUID="4E1AEA7B1AEA6007" TYPE="ntfs" PARTUUID="40e7640c-01"
more /etc/fstab
Entry for /dev/sda6 :
UUID=c7d3764e-d769-427b-8525-3ddb2b868e1e / ext4 errors=remount-r o 0 1
Entry for /dev/sda4 :
UUID=BC2E01E12E019614 /media/Lenovo_Recovery ntfs-3g defaults,locale=en_US.UT F-8 0 0
Entry for /dev/sda1 :
UUID=A2F4028AF40260C1 /media/SYSTEM_DRV ntfs-3g defaults,locale=en_US.UT F-8 0 0
Entry for /dev/sda2 :
UUID=FE980B0E980AC4DD /media/Windows7_OS ntfs-3g defaults,locale=en_US.UT F-8 0 0
Entry for /dev/sda5 :
UUID=66F8DF30F8DEFCED /media/chuckcannon/New\040Volume ntfs defaults
,nosuid,nodev,uhelper=udisks2,uid=1001,gid=1001,dmask=0077,fmask=0177 0
0
Entry for /dev/sdb1 :
UUID=4E1AEA7B1AEA6007 /media/chuckcannon/mta1 ntfs defaults,nosuid,nodev,uh elper=udisks2,uid=1001,gid=1001,dmask=0077,fmask=0177 0 0