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downgrade ontap from 8.2.1 to 8.1.4 fail!!

i try to downgrade ontap from 8.2.1 to 8.1.4, but i forget to input the command: revert_to 8.1.

so i fail to boot the system, and hang on.

can any one  give some suggestion?

the error message as below:

Jun 12 22:39:21 [localhost:kern.version.change:notice]: Data ONTAP kernel version was changed from 8.2.1 to 8.1.4P1.

Jun 12 22:39:24 [localhost:diskown.isEnabled:info]: software ownership has been FLabled for this sWAystem

Jun 1 C2 22:39PL:24 [loEDcalhostGE:dcs.frRamework .enableid:info]s : The DenCS framabework iles enablded on t.his nod Ce.

ahedd hostck 127.0.li10.1: gstateway  =127.0.2 00.1

x7ff841ff

Jun 12 22:39:24 [localhost:wafl.memory.status:info]: 2944MB of memory is currently available for tPANIC  : raid: there are no data or parity disks

version: 8.1.4P1: Tue Feb 11 23:23:31 PST 2014

conf   : x86_64

cpuid = 0

Uptime: 40s

PANIC: raid: there are no data or parity disks in SK process rc on release 8.1.4P1 on Thu Jun 12 22:39:24 GMT 2014

version: 8.1.4P1: Tue Feb 11 23:23:31 PST 2014

compile flags: x86_64

Writing panic info to HA mailbox disks.

HA: current time (in sk_msecs) 19736 (in sk_cycles) 399024572193

DUMPCORE: START

Dumping to disks: 0a.00.10

....................................................................................................

DUMPCORE: END -- coredump written.

Logging shutdown event to the SP...

System halting...

cpu_reset called on cpu#0

i have try net boot, but i fail ! the error message as below:

LOADER-B> netboot http://192.168.1.50/821_q_netboot.tgz

Loading 192.168.1.50/821_q_netboot.tgz:.........Failed: Not an ELF-format executable

Could not load http://192.168.1.50/821_q_netboot.tgz: Not an ELF-format executable

Not an ELF-format executable (errcode=-11)


Re: downgrade ontap from 8.2.1 to 8.1.4 fail!!

I hope this is in your lab.....

And you should be on the phone with support if it's not your lab.

You're probably going to have to netboot, but im not 100% sure

Re: downgrade ontap from 8.2.1 to 8.1.4 fail!!

You can try boot_backup command at loader prompt - it should boot previous version. Otherwise you need to reinstall 8.2.1 using NetBoot.

Re: downgrade ontap from 8.2.1 to 8.1.4 fail!!

Normally if you forgot to issue revent_to this will result to an error like "No usable root volume found"

Try to boot into maintenance mode from special-boot menu during boot CTRL-C

Check the current state of the aggregates, and disk ownerships. if everything looks normal boot with netboot and make a software install and revert_to

good luck

Re: downgrade ontap from 8.2.1 to 8.1.4 fail!!

i will try to netbooting to 8.2.1 and then retry again if it'll work fine. thank!

Re: downgrade ontap from 8.2.1 to 8.1.4 fail!!

i already try to boot_backup at loader prompt, but it still fall to load the system.

on loader stage, i find a bootargs.upgrade = true, Should i change the state from true to false?

should i try to recovery system with these steps as follow?

1. on loader prompt: try to boot_netboot 8.2.1

2. choice (4) to reinitiate disk system form special-boot and install the root volume.

3. reinstall the image of 8.1.4p1、revert_to 8.1 and reboot again to downgrade the system. 

Re: downgrade ontap from 8.2.1 to 8.1.4 fail!!

sadly, i already remove the disk owner, and reinitiate the system from special-boot menu.

can i use netboot to recover all system?

Re: downgrade ontap from 8.2.1 to 8.1.4 fail!!

Do you have any data on this system or was it new, just delivered, factory installed system?

Re: downgrade ontap from 8.2.1 to 8.1.4 fail!!

i have no value data on this system, so i can erase all of it.

can you give any suggestion to factory installed system?

i have try net boot, but i fail ! the error message as below:

LOADER-B> netboot http://192.168.1.50/821_q_netboot.tgz

Loading 192.168.1.50/821_q_netboot.tgz:.........Failed: Not an ELF-format executable

Could not load http://192.168.1.50/821_q_netboot.tgz: Not an ELF-format executable

Not an ELF-format executable (errcode=-11)

Re: downgrade ontap from 8.2.1 to 8.1.4 fail!!

You should extract the tgz, and use netboot http://192.168.1.50/netboot/kernel

I'm in the same situation, but net boot does not work due to:

PANIC: raid: there are no data or parity disks in SK process rc on release 8.1.4P1 on Mon Jun 16 07:55:57 GMT 2014

This system was upgraded to 8.2, but this apparently rewrote the loader firmware and disk labels, which somehow makes it hard to boot either version...

I'm opening a case on this and will hopefully write the solution here.