usb/storage-preinserted test fails with usb stick that do not contain a partition

[Jeff Marcom]

Problem:
There may be instances where a usb key does not contain a valid partition, yet still has a writable filesystem.

Symptoms:
The current usb_pre-inserted test fails with the following:

No removable drives were detected, aborting

Reproducable? yes:
Device can be seen as /dev/sdd in OS and automounts. However pre-inserted test fails because it expects a partition.

Workaround:
Current workaround is to "zero out" the drive, create a partition table and partition on the key. Re-insert key, and restart test.

[Brendan Donegan (brendan-donegan)]

This definitely happens and the removable_storage_test code needs to account for the possibility that the drive may not have any partition table and yet still be writable.

[Brendan Donegan (brendan-donegan)]

The workaround is to always use sticks which have a partition table on them.