Handle read-only combination of tape and drive (#34)

[piste-jp]

Handle read-only combination of tape and drive correctly like LTO5 tape
and LTO7 drive. I enbugged this corruption from 2.2.2.0 to 2.4.0.0.

The fix of issue #33. And this fix was already merged into v2.4.0 branch.

Summary of changes

This pull request includes following changes or fixes.

• Fix of issue #issue_no
• Add foo
• Change bar

Description

Please include relevant motivation and context. List any dependencies that are required for this change.

Fixes #issue_no

Type of change

Please delete items that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have confirmed my fix is effective or that my feature works

[piste-jp]

I'm planning to merge this PR to master branch after the FreeBSD patch.

This fix was already merged into v.2.4.0 branch.

[piste-jp]

I will discard this PL. I want to merge only #34 to master, but this includes #36 automatically...