Initial remote commit

misc_tools/check_volumes.py

@@ -0,0 +1,33 @@
+import subprocess, struct
+
+CHUNK    = 128*512
+LV_START = 5120000*512
+BSIZE    = 4096
+
+# Check istat for volumes dir (inode 1585918) - we know fls works on this
+r = subprocess.run(['istat', '/dev/nbd0', '1585918'],
+                  capture_output=True, text=True)
+print('istat for volumes (inode 1585918):')
+print(r.stdout)
+
+# Check istat for pterodactyl dir (inode 1574102)
+r2 = subprocess.run(['istat', '/dev/nbd0', '1574102'],
+                   capture_output=True, text=True)
+print('istat for pterodactyl (inode 1574102):')
+print(r2.stdout)
+
+# Check which chunk each data block falls in
+def check_block(block_num):
+    virt = block_num * BSIZE
+    group     = virt // (5*CHUNK)
+    in_group  = virt % (5*CHUNK)
+    chunk_idx = in_group // CHUNK
+    return chunk_idx
+
+# Parse direct blocks from istat output
+for line in r.stdout.splitlines():
+    if 'Direct Blocks' in line or (line.strip() and line.strip()[0].isdigit()):
+        blocks = [int(x) for x in line.split() if x.isdigit()]
+        for b in blocks:
+            ci = check_block(b)
+            print(f'  block {b}: chunk_idx={ci} {"METADATA" if ci==4 else "DATA"}')