NEED HELP WITH C3850 IOS UPGRADE

[praveenrk1989]

i have a stacked 3850 2 switches and i need to upgrade ios xe. when i check the flash it does not meet the  requirements for the new ios upgrade

Requirement of new ios:
Min Memory: DRAM 4096 MB Flash 2048 MB
Size: 288.95 MB (302988468 bytes) 

3850#sh file systems 
File Systems:

     Size(b)     Free(b)      Type  Flags  Prefixes
     248354816     244812800      disk     rw   crashinfo: crashinfo-1:
*   1621966848    1269755904      disk     rw   flash: flash-1        

2097152       2064345     nvram     rw   stby-nvram:

  2097152       2064345     nvram     rw   nvram:

 248512512     247988224      disk     rw   crashinfo-2: st-crashinfo:
*   1622147072    1393557504      disk     rw   flash-2 stby-flash:

Please help me with this.

[David Nolasco]

Hi Praveen,

The size of the flash itself is 2048 MB (2GB), it does not mean you need to have that space to install the new IOS image, which has a size of 288.96 MB. You have plenty space (1.6 GB) to perform the IOS upgrade. 

Anyway, if you start the upgrade process and there is not enough space you will get an error and the upgrade process will be aborted.

Hope it helps!

[David Nolasco]

Adding to my previous post and answering your question...

Certain amount of memory is taken from the flash as soon as the device boots up. This varies from platform to platform hence the difference is expected. For this particular switch you will see around .5 Gb less of space.

BR