USB and 2800 routers

Unanswered Question
Apr 3rd, 2008

I get an error %USB_HOST_STACK-3-USB_FLASH_READY_TEST_FAILED : USB flash failed to pass 'Ready' test when I connect a 2gig usb drive to a router with version 12.4(11)T4.

Can anyone suggest any remedy?

I have this problem too.
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Overall Rating: 3.3 (3 ratings)
Joseph W. Doherty Fri, 04/04/2008 - 05:09

"[edit] it might also be a USB version issue. According to the documentation that I am seeing the 2800 supports version 1.1 USB."

USB 2.0 devices should work in 1.1 ports; normally the notable feature loss being the port rate; i.e. 480 Mbps to 12 (or 1.5) Mbps. Rick's suggestion on using 256 MB or smaller is likely what you need to do. (Also note, I recall a formatting issue, as in only FAT might be supported, not FAT32.)

Paolo Bevilacqua Fri, 04/04/2008 - 08:38

Actually even largish sizes work, see below a 1GB one:

bws-cme#sh usbflash0: all

No files on device

******** USB Flash Geometry/Format Info ********


Sector Size 512

Total Sectors 2030592


Number of FATs 2

Number of Sectors per FAT 247

Sectors Per Cluster 32

Number of Clusters 63438

Number of Data Sectors 2030016

Logical Base FAT Sector 1

Logical Base Root Sector 495

Logical Base Data Sector 527

What you want is a good brand flash and if doesn't work try another brand.

Hope this helps, please rate post if it does!

mohammedmahmoud Fri, 04/04/2008 - 09:02


Agree with Paolo, tried many types until having a 4GB Kingston working.


Mohammed Mahmoud.

leighcrawford1 Sun, 04/06/2008 - 17:37

Well I have had some success. Yes I can get a smaller 128Mb 1.1 USB to work. However I can copy the IOS to the USB after reformatting the drive but when I go to reinsert the USB it comes up with the message of reformatting the USB drive to recongize it The message is

usbflash1 contains unexpected values in partition table or boot sector. Device needs formatting before use!

any suggestions



Richard Burts Sun, 04/06/2008 - 17:59


Would I be correct in assuming that: "I can copy the IOS to the USB after reformatting the drive" indicates that the reformatting was on the PC? Try formatting the USB on the router and then use it to copy IOS image.



leighcrawford1 Sun, 04/06/2008 - 18:49


I have been formatting using the router only.

After I format the drive I can copy the IOS to the USB drive. When I remove the drive and reinsert the USB drive the router asks to format the drive again.



Richard Burts Sun, 04/06/2008 - 19:06

Leigh (sorry for the typo error last time)

I am sorry that I misunderstood the previous reference about formatting the drive. If you are formatting on the router, then copy an image file, and when you insert in the router again it wants to format the drive again is very odd behavior. I am not sure that I have a good suggestion about this.



leighcrawford1 Sun, 04/06/2008 - 19:10

Yes Rick you are correct in what is happening.

Can you tell me what is the differnce between a Cisco USB flash memory module and an ordinary USB drive?


Richard Burts Sun, 04/06/2008 - 19:31


I do not have any real experience with the USB drives in Cisco routers and can not explain the difference between a Cisco USB and an ordinary USB. Perhaps some others in the forum can address this?



Joseph W. Doherty Mon, 04/07/2008 - 03:34

As to other suggestions, can't say any will help, but you might upgrade the IOS to 12.4.15T4 (from your 12.4.11T4), downgrade IOS to 12.4.19, and/or upgrade the ROMMOM to 12.4(13r)T6 if not already at that level.


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