ReadyNAS6 Pro failed to boot with "could not properly extract" after Upgrade from 6.6.1 to 6.7.3

[goi]

Hi,

urgent call:
 - Just updated from 6.6.1 to 6.7.3, during this upgrade a boot message came up with "ERR: could not properly extract".

I cannot reach the system by SSH to look what happened, and I eventually will loose data as i don't know if the last backup (yesterday) is intact.

Thank you for you help.

regards

GOI

Addendum:

 - Booting with no disks -> could be found in Raidar -> so at least not bricked.

 - now checking boot with disks if it can be found in Raidar

   -> booting with disks does NOT work: Could not be found in Raidar.

 - now checking with dedicated network (PC <-> ReadyNAS6)

[goi · Accepted solution]

Solved by mdgm:

 - copied the root (md0) partition

 - a rebuild of the md0 partition was made

 - recopied the data back to md0

 - and initiated an os extract on next reboot again

 not to forget:

MANY THANKS TO MDGM! You saved my day.

[goi]

Addendum:

 - Booting in Service Mode (aka Maintenance Mode aka Tech Support Mode):

  -> works and gives me a telnet access -> but whats the user name and the password?

[mdgm-ntgr]

It's one thing to know how the credentials (which are not hard to find on the web), it's quite another to know what to do after you login. I've sent you a PM.

[goi · Accepted solution]

Solved by mdgm:

 - copied the root (md0) partition

 - a rebuild of the md0 partition was made

 - recopied the data back to md0

 - and initiated an os extract on next reboot again

 not to forget:

MANY THANKS TO MDGM! You saved my day.