Renaming Files in Router Flash via the rename Command

One of our core Cisco 7206VXR router rebooted by itself a few days ago and according to show version output, there was a watchdog timer expired. I did some troubleshooting to dig more info and also raised a TAC case based on the show stacks output. The Cisco TAC engineer advised me to upgrade the IOS to c7200-spservicesk9-mz.124-24.T8.bin

CORE01#show version
Cisco IOS Software, 7200 Software (C7200-SPSERVICESK9-M), Version 12.4(24)T1, RELEASE SOFTWARE (fc3) Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Fri 19-Jun-09 20:27 by prod_rel_team

ROM: System Bootstrap, Version 12.3(4r)T3, RELEASE SOFTWARE (fc1)

CORE01 uptime is 3 days, 20 hours, 14 minutes
System returned to ROM by watchdog timer expired
System restarted at 12:16:05 UTC Mon Aug 17 2015
System image file is "disk2:c7200-spservicesk9-mz.124-24.T1.bin"

CORE01#show stacks ?
  <1-8192>  Process to show stack detail on
  |         Output modifiers
  <cr>

CORE01#show stacks
Minimum process stacks:
 Free/Size   Name
 8328/9000   EEM ED RF
59164/60000  script background loader
58916/60000  EEM Auto Registration Proc
 5396/6000   SASL MAIN
 2400/3000   allegro libretto init
10936/12000  Router Init
 4212/6000   Update prst
 3348/12000  Init
 4244/6000   DIB error message
 5192/6000   RADIUS INITCONFIG
 5236/6000   BGP Accepter
 3396/6000   BGP Open
 2280/3000   Rom Random Update Process
 2764/6000   BFD PP Process
11172/12000  BFD
 8632/12000  BFD events
33860/36000  TCP Command
 6640/12000  Virtual Exec
 3484/6000   TFTP Read Process

Interrupt level stacks:
Level    Called Unused/Size  Name
  1   345573575   4724/9000  Network interfaces
  2           0   9000/9000  DMA/Timer Interrupt
  3      146504   7884/9000  PA Management Int Handler
  4          65   8596/9000  Console Uart
  5           0   9000/9000  OIR/Error Interrupt
  7    83084011   8372/9000  NMI Interrupt Handler

Spurious interrupts: 388

System was restarted by watchdog timer expired

-----------------------------------------------------------------
   Possible software fault. Hardware replacement may not
   correct problem. Upon recurrence, please collect
   crashinfo, "show tech" and contact Cisco Technical Support.
-----------------------------------------------------------------


The TFTP process on a Cisco 7206VXR router is slightly different compared to other router platforms and the command to use is copy tftp disk2. I deleted the current IOS since the router flash isn't large enough and also pointed to the new IOS image. Hopefully, there's no auto reboot again on this router and eventually use the new and stable copy of the IOS. After the TFTP process, I need to rename the IOS file name using the rename command in privileged mode.

CORE01#ping 172.27.25.164     // PING TO TFTP SERVER/PC

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.27.25.164, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 52/55/56 ms

CORE01#copy tftp://172.27.25.164/c7200-spservicesk9-mz.124-24.T8.bin disk2
Destination filename [disk2]?     // FOR SOME REASON THE FILE NAME WAS CHANGED TO disk2
Accessing tftp://172.27.25.164/c7200-spservicesk9-mz.124-24.T8.bin...
Loading c7200-spservicesk9-mz.124-24.T8.bin from 172.27.25.164 (via GigabitEthernet0/2): !
%Error copying tftp://172.27.25.164/c7200-spservicesk9-mz.124-24.T8.bin (Not enough space on device)
CORE01#delete disk2:c7200-spservicesk9-mz.124-24.T1.bin                     
Delete filename [c7200-spservicesk9-mz.124-24.T1.bin]?
Delete disk2:/c7200-spservicesk9-mz.124-24.T1.bin? [confirm]
CORE01#copy tftp://172.27.25.164/c7200-spservicesk9-mz.124-24.T8.bin disk2
Destination filename [disk2]?
Accessing tftp://172.27.25.164/c7200-spservicesk9-mz.124-24.T8.bin...
Loading c7200-spservicesk9-mz.124-24.T8.bin from 172.27.25.164 (via GigabitEthernet0/2): !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[OK - 36906144 bytes]

36906144 bytes copied in 4284.884 secs (8613 bytes/sec)

CORE01#show disk2
-#- --length-- -----date/time------ path
2     36906144 Aug 19 2015 02:49:30 disk2    // T8 IOS
3           83 Jun 26 2012 04:01:08 staging-running-config
CORE01#rename disk2: ?
  WORD  Destination file path

CORE01#rename disk2:disk2 c7200-spservicesk9-mz.124-24.T8.bin
CORE01(conf)#no boot system disk2:c7200-spservicesk9-mz.124-24.T1.bin
CORE01(conf)#boot system disk2:c7200-spservicesk9-mz.124-24.T8.bin