Add scripts and configuration files for mergerfs setup and testing

- Created backup files for wipefs on specific disk partitions.
- Added db-test script to verify metadata.db file integrity.
- Documented successful mergerfs branch and pool configurations in mfs-good.txt.
- Implemented mfs write test in mfs-test.txt.
- Included mergerfs version and device information in mfs.txt.
- Developed rebuild scripts for mergerfs stages, including verification and filesystem creation.
- Generated stage logs for each rebuild step to track disk and filesystem status.
- Added checks for systemd mount requirements and filesystem verification in stage4.

others/plex-lvm-recovery/archive/plex-new_00001-1729864948.vg

@@ -0,0 +1,37 @@
+# Generated by LVM2 version 2.03.11(2) (2021-01-08): Sat Jul  8 12:09:41 2023
+
+contents = "Text Format Volume Group"
+version = 1
+
+description = "Created *before* executing 'lvcreate -L 7TB -n plex-new plex-new'"
+
+creation_host = "banshee"	# Linux banshee 5.15.0-76-generic #83-Ubuntu SMP Thu Jun 15 19:16:32 UTC 2023 x86_64
+creation_time = 1688836181	# Sat Jul  8 12:09:41 2023
+
+plex-new {
+	id = "2rGudJ-RokN-XqVg-rRxt-IDJ2-S3OW-eOXEkb"
+	seqno = 1
+	format = "lvm2"			# informational
+	status = ["RESIZEABLE", "READ", "WRITE"]
+	flags = []
+	extent_size = 8192		# 4 Megabytes
+	max_lv = 0
+	max_pv = 0
+	metadata_copies = 0
+
+	physical_volumes {
+
+		pv0 {
+			id = "eO6Jcl-N5oF-1Gzl-ejOn-58co-PR0A-qYhTfy"
+			device = "/dev/sdf"	# Hint only
+
+			status = ["ALLOCATABLE"]
+			flags = []
+			dev_size = 15628053168	# 7.27738 Terabytes
+			pe_start = 2048
+			pe_count = 1907721	# 7.27738 Terabytes
+		}
+	}
+
+
+}