Upcoming Maintenance Alert:

The UBNT Community will be upgraded at 5pm MDT on April 25th. During this time the community forums will be set to read-only status.

Learn more

×
Reply
Highlighted
New Member
Posts: 5
Registered: ‎08-30-2013

Unifi and Bad CRC

I do have the following issue.

Is there someone kind enough to provide some information on how to handle it?

 

U-Boot 1.1.4-gb387d959 (Dec  8 2011 - 10:16:49)

Board: Ubiquiti Networks AR7241 board (e512-6.0101.002e)
DRAM:  64 MB
Flash:  8 MB
*** Warning - bad CRC, using default environment

Net:   eth0, eth1
Hit any key to stop autoboot:  0
## Booting image at 9f050000 ...
   Image Name:   MIPS Ubiquiti Linux-2.6.15-5.2
   Created:      2012-02-24  16:55:55 UTC
   Image Type:   MIPS Linux Kernel Image (lzma compressed)
   Data Size:    730087 Bytes = 713 kB
   Load Address: 80002000
   Entry Point:  80002000
   Verifying Checksum at 0x9f050040 ...Bad Data CRC
ar7240> urescue
Setting default IP 192.168.1.20
Starting TFTP server...
Using eth0 (192.168.1.20), address: 0x81000000
Waiting for connection: |
Receiving file from 192.168.1.254:55483
Received 4506986 bytes
Firmware check failed! (-2)
eth1 link down
Setting default IP 192.168.1.20
Starting TFTP server...
Using eth0 (192.168.1.20), address: 0x81000000
Waiting for connection: *
Receiving file from 192.168.1.254:54453
Received 4506986 bytes
Firmware check failed! (-2)
eth1 link down
Setting default IP 192.168.1.20
Starting TFTP server...
Using eth0 (192.168.1.20), address: 0x81000000
Waiting for connection: |
Abort
ar7240>

 

Member
Posts: 157
Registered: ‎01-22-2013
Kudos: 50
Solutions: 9

Re: Unifi and Bad CRC

See if this info helps:

http://community.ubnt.com/t5/UniFi/UAP-Outdoor-quot-Firmware-check-failed-quot/m-p/462575/highlight/...

“Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.” - AE
Ubiquiti Employee
Posts: 7,053
Registered: ‎01-28-2013
Kudos: 8351
Solutions: 574
Contributions: 20

Re: Unifi and Bad CRC

[ Edited ]

Hi,

I have something you can try. Do note that this error can also indicate a hardware issue as opposed to a software issue. So no guarantees what I have will solve your issue.

Best regards,
Mike

New Member
Posts: 5
Registered: ‎08-30-2013

Re: Unifi and Bad CRC

Dear Mike,

thanks for the help you provided.

Following your instructions, I got the following results

 

U-Boot 1.1.4-gb387d959 (Dec  8 2011 - 10:16:49)

Board: Ubiquiti Networks AR7241 board (e512-6.0101.002e)
DRAM:  64 MB
Flash:  8 MB
*** Warning - bad CRC, using default environment

Net:   eth0, eth1
Hit any key to stop autoboot:  0
## Booting image at 9f050000 ...
   Image Name:   MIPS Ubiquiti Linux-2.6.15-5.2
   Created:      2012-02-24  16:55:55 UTC
   Image Type:   MIPS Linux Kernel Image (lzma compressed)
   Data Size:    730087 Bytes = 713 kB
   Load Address: 80002000
   Entry Point:  80002000
   Verifying Checksum at 0x9f050040 ...Bad Data CRC
ar7240> setenv serverip 192.168.1.254
ar7240> tftp 80000000 uboot-env.bin
Using eth0 device
TFTP from server 192.168.1.254; our IP address is 192.168.1.20
Filename 'uboot-env.bin'.
Load address: 0x80000000
Loading: #############
done
Bytes transferred = 65536 (10000 hex)
ar7240> erase 1:4
Erase Flash Sectors 4-4 in Bank # 1 . done
ar7240> cp.b 80000000 9f040000 10000
Copy to Flash... write addr: 9f040000
done
ar7240> reset

Resetting...

U-Boot 1.1.4-gb387d959 (Dec  8 2011 - 10:16:49)

Board: Ubiquiti Networks AR7241 board (e512-6.0101.002e)
DRAM:  64 MB
Flash:  8 MB
*** Warning - bad CRC, using default environment

Net:   eth0, eth1
Hit any key to stop autoboot:  0
## Booting image at 9f050000 ...
   Image Name:   MIPS Ubiquiti Linux-2.6.15-5.2
   Created:      2012-02-24  16:55:55 UTC
   Image Type:   MIPS Linux Kernel Image (lzma compressed)
   Data Size:    730087 Bytes = 713 kB
   Load Address: 80002000
   Entry Point:  80002000
   Verifying Checksum at 0x9f050040 ...Bad Data CRC
ar7240>

 I think this goes for RMA as it seems to be a HW problem.

 

BR,

PALLiS

Ubiquiti Employee
Posts: 7,053
Registered: ‎01-28-2013
Kudos: 8351
Solutions: 574
Contributions: 20

Re: Unifi and Bad CRC

Hi Pallis,

You're welcome.

If you tried it several times and got same CRC error message, that means something's wrong on flash IO from u-boot. That likely indicates a hardware issue. It can't be fixed from software side.

Thanks,
Mike

Reply