This was an issue that I had previously in September of last year and sent the issue to this mailing list ("win-mounts no longer displays anything when doing "cat /proc/partitions") but the issue stopped occurring before I could get around to diagnosing it. This issue has now re-occurred and this time it seems permanent. When I run:
$ cat /proc/partitions major minor #blocks name win-mounts 8 0 0 sda 8 16 0 sdb 8 32 0 sdc 8 48 0 sdd 8 64 0 sde 8 80 0 sdf ...I see nothing at all in the win-mounts column. This makes it impossible for me to see which Windows drive letter maps to which /dev/sdX entry. On closer inspection, this seems to be because I'm not actually seeing any partitions of my drives, even though there are many - for example, I see /dev/sda but no /dev/sda1 or /dev/sda2, and because it's the partitions that are mounted, it's this that seems to result in me seeing nothing in the win-mounts column. I'm running Cygwin on Windows 7 (yes I'm aware it's EOL). For testing purposes I also ran the following command (for obvious reasons I don't want to have run something like this to find my drive mappings): $ for disk in /dev/sd*; do echo -n $disk$'\t'; cygpath -m $disk; done /dev/sda //./PhysicalDrive0 /dev/sda1 //./D: /dev/sdb //./PhysicalDrive1 /dev/sdc //./PhysicalDrive2 /dev/sdc1 //./Volume{88cc26b4-e0e5-11e9-9cc4-806e6f6e6963} /dev/sdc2 //./C: /dev/sdd //./PhysicalDrive3 /dev/sdd1 //./B: /dev/sde //./PhysicalDrive4 /dev/sde1 //./HarddiskVolume5 /dev/sde2 //./E: /dev/sdf //./PhysicalDrive5 /dev/sdf1 //./I: ​Thanks in advance for any help with this, it would be very much appreciated as I rely on Cygwin a lot.