Diff of Infrastructure And Operations/Rathouse at a4e0482

diff --git a/infrastructure_and_operations/rathouse.myco b/infrastructure_and_operations/rathouse.myco
index 292f4bc..6c4c4d4 100644
--- a/infrastructure_and_operations/rathouse.myco
+++ b/infrastructure_and_operations/rathouse.myco
@@ -7,2 +7,50 @@ we need them for `virsh backup-begin`
 
+# Disk Stuff
+
+### serial numbers
+
+```
+frontplate number | SSD serial number
+0                 | 24010919300014
+1                 | 22062712800355
+2                 | PHYF209106Y93P8EGN
+3                 | PHYF209300LX3P8EGN
+```
+
+use `smartctl -x /dev/sdb | grep Serial` to print serial numbers.
+
+
+### How to check disk health:
+
+```
+root@rathouse:~# smartctl -x /dev/sda | grep -B1 -A4 'Percentage Used Endurance Indicator' 
+0x07  =====  =               =  ===  == Solid State Device Statistics (rev 1) ==
+0x07  0x008  1               0  ---  Percentage Used Endurance Indicator
+                                |||_ C monitored condition met
+                                ||__ D supports DSN
+                                |___ N normalized value
+
+root@rathouse:~# smartctl -x /dev/sdb | grep -B1 -A4 'Percentage Used Endurance Indicator'
+0x07  =====  =               =  ===  == Solid State Device Statistics (rev 1) ==
+0x07  0x008  1               1  ---  Percentage Used Endurance Indicator
+                                |||_ C monitored condition met
+                                ||__ D supports DSN
+                                |___ N normalized value
+
+root@rathouse:~# smartctl -x /dev/sdc | grep -B1 -A4 'Percentage Used Endurance Indicator'
+0x07  =====  =               =  ===  == Solid State Device Statistics (rev 1) ==
+0x07  0x008  1               0  ---  Percentage Used Endurance Indicator
+                                |||_ C monitored condition met
+                                ||__ D supports DSN
+                                |___ N normalized value
+
+root@rathouse:~# smartctl -x /dev/sdd | grep -B1 -A4 'Percentage Used Endurance Indicator'
+0x07  =====  =               =  ===  == Solid State Device Statistics (rev 1) ==
+0x07  0x008  1               0  ---  Percentage Used Endurance Indicator
+                                |||_ C monitored condition met
+                                ||__ D supports DSN
+                                |___ N normalized value
+```
+
+
 # EFI / bootloader
@@ -36,15 +84,2 @@ ls /boot/efi/EFI
 
-# Disk Stuff
-
-### serial numbers
-
-```
-frontplate number | SSD serial number
-0                 | 24010919300014
-1                 | 22062712800355
-2                 | PHYF209106Y93P8EGN
-3                 | PHYF209300LX3P8EGN
-```
-
-use `smartctl -x /dev/sdb | grep Serial` to print serial numbers.