Added details on how to skip disk and software preflight checks

Author: davidjarzebowski

docs/usage.md

@@ -73,13 +73,18 @@ appliance at IP "5.5.5.5":
     Restore of 5.5.5.5:122 from snapshot 20180326T020444 finished.
     To complete the restore process, please visit https://5.5.5.5/setup/settings to review and save the appliance configuration.
 
-A different backup snapshot may be selected by passing the `-s` argument and the
-datestamp-named directory from the backup location.
+A different backup snapshot may be selected by passing the `-s` argument to `ghe-restore` and specifcying the
+datestamp-named directory from the backup location as the value.
 
 The `ghe-backup` and `ghe-restore` commands also have a verbose output mode
 (`-v`) that lists files as they're being transferred. It's often useful to
 enable when output is logged to a file.
 
+Every time you execute `ghe-backup` we verify the storage and software setup of the host 
+you [installed][1] Backup Utilities on, to make sure our [requirements][2] for the host are 
+met. You can disable this check using the `--skip-checks` argument or by 
+adding `GHE_SKIP_CHECKS=true` to your configuration file.
+
 ### Restoring settings, TLS certificate, and license 
 
 When restoring to a new GitHub Enterprise Server instance, settings, certificate, and
@@ -107,3 +112,4 @@ GitHub Actions enabled, the following steps are required:
 Please refer to [GHES Documentation](https://docs.github.com/en/enterprise-server/admin/github-actions/advanced-configuration-and-troubleshooting/backing-up-and-restoring-github-enterprise-server-with-github-actions-enabled) for more details.
 
 [1]: https://github.com/github/backup-utils/blob/master/docs/getting-started.md
+[2]: requirements.md