C-DOT 8.3 Downgrade to 8.2.3

[hochschuleda]

Hi,

we got a new 2554 shipped with 8.3 but want to downgrade to 8.2  7-Mode.

Since i dont want to deal with c-dot at the moment we canceled system setup and played with it a little before wiping it the first time.

Now our first image has 8.3 still and the backup image is 8.2.3 (installed via system node image update ftp server.

When i boot from backup within the boot manager i still cant 8.2.3 usable since its makeing a kernel dump and reboots again and again.

Whats the easiest way (AND FAST !!! ) to wipe it (we have no data on it and not used it at all so far) and get 8.2.3 running ?

I dont want/need to wipe all disks with that initialization menu since it takes 7 hours before i can start setup again.

any help appreciated. BTW i really would like to have 7-Mode instead of 8.2.3 Cluster Mode at the end

thanks

[aborzenkov]

First you can not downgrade from 8.3 (C-Mode only) to 7-Mode - you need to perform new installation of 7-Mode. Also disk lables in 8.3 are not recognized (or, better, accepted) by 8.2 which explains panic - it does not see any disk. So to install new 8.2 version you would need to

1. downgrade to 8.2.x C-Mode. Follow standard documentation, if it is new system it should be easy. You do not care about preserving data anyway. This will downgrade disk labels.
2. Follow https://kb.netapp.com/support/index?page=content&id=1014786 to reinstall 7-Mode.

PS Sorry, had to edit reply as critical "not" was missing - you cannot downgrade (or upgrade) between C-Mode and 7-Mode.

[hochschuleda]

Thanks for the tips.

i can already boot_backup to 8.2.3 clustered, so i guess i will do the steps in 

How to convert a clustered Data ONTAP 8.x node to a 7-Mode node

after i got rid of the panic ?

i have started to wipe the filer now after booting to the 8.2.3C backup image, if its wiping the whole thing now in 8.2.3 then the panic will be gone and i can revert to 7 mode, correct ?

[JGPSHNTAP]

Whomever ordered the systems ordered them wrong.  They should have been ordered with 7-mode SKU and not cDOT sku.

But, since it's a new system, just call support and they will walk you thru

[aborzenkov]

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i can already boot_backup to 8.2.3 clustered

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"Panics on boot" does not fall to me into "can boot" category 🙂

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i have started to wipe the filer now after booting to the 8.2.3C backup image, if its wiping the whole thing now in 8.2.3 then the panic will be gone and i can revert to 7 mode, correct ?

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I would be very surprised if it worked. You need to downgrade disk labels and for this you must perform downgrade from 8.3 to 8.2. Booting backup image is not downgrade.