Format Usb Ios
  • Ultra Dual USB Drive 3.0 support information page Dual Drive is not recognized in SanDisk Memory Zone Formatting SanDisk USB flash drives in FAT32 format using third-party Windows applications.
  • Are you trying to copy the IOS from the USB to the router? Are you trying to boot from the USB? For #1, not all USB sticks are fully supported. The USB stick(s) need to be formated to FAT16. For #2, depending on your router. ISR G1 (except of the 870) need to upgrade the bootstrap to 12.4(13r)Tx before you can boot via USB.
  • Apple pushed out a host of new features in iOS 13 and iPadOS 13, and one of the most significant is native support for external storage—it means you can plug in thumb drives, external disk.

After making a Bootable USB drive for installing Operating Systems like Ubuntu via Pen drive using softwares like PowerISO, when you format your pen drive using Windows or Ubuntu it will show about only 2 MB of memory in a 4 GB pen drive. Follow the steps to format the pen drive properly and restore it back to its original condition.

Learning has never been so easy!

You can use the Cisco USB thumb drive to upgrade the IOS of any 3750 Switch that isn't running 12.2(58). These are the steps you do to make that happen.

Format Usb Using Dos

6 Steps total

Step 1: Make sure the IOS is on the Cisco USB Drive

For this, I am using a Lexar 4Gb drive.

Step 2: Insert drive in the USB port on the back of the switch

Once you are consoled into the switch, you can insert the USB drive into the back of the switch. There is only one place it will plug in. You will see 'usbflash0: has been inserted' come up on the screen..

Step 3: Copy the IOS into Flash: on the switch

This is done with the following command: copy usbflash0:c3750e-universalk9-mz.122-58.SE2.bin flash:

This will copy the .bin file on the USB into the flash memory of the switch. If you do a 'sh flash:' on the switch, you will see both of them listed in there.

Directory of flash:/
2 -rwx 7728 Jan 16 2014 14:22:00 -06:00 vlan.dat
3 -rwx 2072 Feb 13 2014 07:58:36 -06:00 multiple-fs
461 -rwx 57686 Feb 13 2014 07:58:36 -06:00 config.text
4 -rwx 5309 Feb 13 2014 07:58:36 -06:00 private-config.text
6 drwx 512 Feb 28 1993 18:10:34 -06:00 c3750e-universalk9-mz.122-55.SE2
6 drwx 512 Feb 12 2014 18:10:34 -06:00 c3750e-universalk9-mz.122-58.SE2

Step 4: Tell switch to boot to the new IOS - and reboot

switch#config t
switch#(config)boot system c3750e-universalk9-mz.122-58.SE2.bin
switch#(config)exit
switch#reload
switch#(confirm) y

Step 5: Switch boots to new IOS - Remove Old IOS from Flash

Format Usb Installer

Once the switch boots back up to the new IOS, you can delete the old one out of flash. This is done with the following command:

switch#delete /recursive /force flash:c3750e-universalk9-mz.122-55.SE2.bin

Step 6: Remove USB drive from switch

You can really mess up a switch if you don't know what you are doing. Make sure you pay close attention before executing any of these commands.

Published: Feb 14, 2014 · Last Updated: Mar 05, 2014

Format Usb Drive Ios

13 Comments

Format Usb On Ubuntu

Format
  • Jalapeno
    WestelCS Feb 18, 2014 at 10:29pm

    This is a very nice and properly guiding article that you have shared. The steps are quite clearly explained. I will try this.

  • Pimiento
    Bradford Mitchell Jul 30, 2015 at 06:49pm

    Will this work with a USB CD-ROM drive as well?

  • Anaheim
    Tim6546 Jul 31, 2015 at 03:32pm

    I have never tried that but I would imagine that if the switch can see it, it would work. If you try it, let me know if it works.

  • Jalapeno
    zkording Nov 2, 2015 at 07:03pm

    I used this guide to flash a new switch today. Thanks for the helpful post!

  • Anaheim
    Taca Nov 19, 2015 at 04:02pm

    Used this today as well. Thank you, very good instructions.

  • Chipotle
    shelzmike May 19, 2016 at 07:55pm

    Very straightforward tutorial. Cisco has good documentation, but sometimes it is 'too much' and we all know we don't have time for that.

    One point of note, Step 4 seems to be missing some text in the command, at least for the 3650.

    You have: switch#(config)boot system c3750e-universalk9-mz.122-58.SE2.bin

    It should be: switch#(config)boot system flash:c3750e-universalk9-mz.122-58.SE2.bin

    Without specifying the flash: directory you will get a 'File system with suffix not allowed error:

    Thanks again!

  • Poblano
    jamallhendrix Jun 2, 2016 at 08:08pm

    Worked like a charm on a 2960X. Well done sir.

  • Pimiento
    anthonyholland Nov 1, 2017 at 03:50pm

    Great post! my colleagues and I are using this method to swap out the OS on about nine hundred 3850s in the span of a week. While the method itself works, we've been having hit or miss luck with the flash drive hanging up during the copy process and getting errors upon plugging the flash drive into the USB port, switch wants to run fcsk on it each time.

    I was curious - can anyone can recommend a brand/size of flash drive that works reliably without failures or errors upon plugging in to the USB port?

    We've had some success with PNY, but just say no to SanDisk when it comes to this type of work - the 16/32GB Cruzer Glides have been worthless - you get what you pay for I guess.

    Thanks for your feedback!

  • Pimiento
    dekunlejamiuadeoye Jan 29, 2018 at 10:19am

    thanks very much. but can any one assist on how to run this process once on a master switch in a stack network

  • Anaheim
    Donavan_ Apr 10, 2018 at 07:56pm

    I also had to tweak the command in Step 4, but not like Shelzmike

    You have: switch#(config)boot system c3750e-universalk9-mz.122-58.SE2.bin

    Shelzmike: switch#(config)boot system flash:c3750e-universalk9-mz.122-58.SE2.bin

    I needed: switch#(config)boot system flash bootflash:isr4300-universalk9.16.03.SPA.bin

    To troubleshoot: switch#sh run i boot

  • Pimiento
    Sridhar_D Jun 20, 2018 at 05:37pm

    Thats a nice and clean info you gave it here. But in my case, the Cisco 3560 CX Series switch is not booting due to image signature verification. So it is getting into ROMMON Mode. Willl this same commands works in ROMMON Mode??

  • Jalapeno
    MaestroNate Nov 1, 2019 at 01:13pm

    This method is still working like a charm! Worth mentioning would be how the USB drive needs to be formatted in FAT16/FAT32 in order for it to be read by the IOS.

    I did notice that you didn't specify in the final step:

    #: boot system flash:[filename]

    Since I'm the most entry level guy on my team I specified flash, just to be safe. :)

    Thanks for the post! This was a helpful find for me.

  • Pimiento
    Shrek-2154 Dec 10, 2020 at 05:47pm

    Hi just one issue i found while using this command to boot the switch

    Switch(config)#boot system cat3k_caa-universalk9.16.06.04.SPA.bin
    File System with suffix not allowed

    Switch Model : WS-C3850-24P-L
    BOOTLDR: CAT3K_CAA Boot Loader (CAT3K_CAA-HBOOT-M) Version 4.68,

    I think it again depends on different models in 3850,

    Please suggest should I have used ?
    boot system flash:filename.bin

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