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Possible to upgrade a diskless 6240 via netboot?

Hello,

I'm doing a 6070 to 6240 head swap, with the 6070 at 8.0.1p5 and the 6240 currently at 8.0.2p4. Due to some critical issues with 8.0.2p4, I need to get both controllers up to 8.0.3 or 8.1. I know I can upgrade the 6070 to whatever version we decide on, then head swap as usual, netboot the 6240 to that same version, reassign disks and destroy mailboxes, then netboot again and upgrade. However, I'd feel a bit more comfortable with the process if I could upgrade the 6240 ahead before the head swap. Is that possible via netboot and the maintenance mode environment, or does the ONTAP upgrade require a root volume?

Thanks.

Re: Possible to upgrade a diskless 6240 via netboot?

With 8.x netboot is supported only for re-imaging of boot device, so you should not be able to go into maintenance mode after netboot, but you should be able to install new Data ONTAP version using “Install new software” boot menu option.

Head swap with with 8.x is complicated by need to restore varfs before it is overwritten ☺ I have not seen step by step instructions; actually, after NOW redesign all instructions for head swap disappeared. So I believe that procedure should be

- install software on boot device

- go to maintenance mode (booting from boot device) and reassign disks

- go to boot menu and select “Update flash from backup config”

- finally confirm that serial number has really changed during next boot

If you could describe procedure you followed for this head swap, it would be very helpful.

- From: bjacobsen

Sent: Friday, May 18, 2012 7:43 AM

To: Borzenkov, Andrey

Subject: - Possible to upgrade a diskless 6240 via netboot?

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Possible to upgrade a diskless 6240 via netboot?

created by bjacobsen<https://communities.netapp.com/people/bjacobsen> in Data ONTAP - View the full discussion<https://communities.netapp.com/message/81844#81844>

Hello,

I'm doing a 6070 to 6240 head swap, with the 6070 at 8.0.1p5 and the 6240 currently at 8.0.2p4. Due to some critical issues with 8.0.2p4, I need to get both controllers up to 8.0.3 or 8.1. I know I can upgrade the 6070 to whatever version we decide on, then head swap as usual, netboot the 6240 to that same version, reassign disks and destroy mailboxes, then netboot again and upgrade. However, I'd feel a bit more comfortable with the process if I could upgrade the 6240 ahead before the head swap. Is that possible via netboot and the maintenance mode environment, or does the ONTAP upgrade require a root volume?

Thanks.

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Re: Possible to upgrade a diskless 6240 via netboot?

This should work...but have to take some iterations of a process to get it to the boot menu then option 7 to update software.  I would setup the Service Processor and then you can access both SP and e0M for all networking.  Many don't know but you can setup the SP from the loader prompt (very useful for V-Series installs without NetApp disk shelves) in advanced mode.

I'd try something like this... you can't hurt anything since no disks attached yet and standalone controllers...

1) CTRL-C to break boot before the system comes up to get to the loader prompt.

2) loader> priv set advanced

3) loader*> sp setup                    # get the SP setup then you can have console access...even direct attach your laptop and get both SP then e0M which you'll configure next

     *** confirm you can get to the SP on the network (or use a console still but assuming you are using e0M next but could be any network port)

4) loader> ifconfig e0M -addr=filer_addr -mask=netmask   # can also enter but likely don't need if on your laptop on the same network -gw=gateway -dns=dns_addr -domain=dns_domain

5) loader> boot_ontap

6) wait for special boot menu prompt then CTRL-C to break boot

7) choose option (7) Install new software first

8) choose a path to install software...same as if you are netbooting but specify the target      http://path_to_the_web-accessible_directory/image.tgz

9) Then you will enter "Y" to reboot

10) confirm the ONTAP version is the matching one 8.0.3 or 8.1

No guarantees on this but should be close steps to experiment with and get the flash installed...

Another brute force method is to write to the flash card with a card writer on your laptop...but safer to install from the controller itself.

Re: Possible to upgrade a diskless 6240 via netboot?

Does 62xx have flash card? I thought it have UFM module?

And the problem is not really to reimage boot device, but to make sure configuration is preserved after that ☺ It is documented for simple boot device replacement, but not for additional head swap => sysid change.

Re: Possible to upgrade a diskless 6240 via netboot?

Normal head swap can happen after matching ontap. I have use it for gx in the past.

I haven't tried pulling the memory card out but has to be a slot type we can write to on a laptop.

Re: Possible to upgrade a diskless 6240 via netboot?

Thinking about it more, I'd like to take out the boot card and see what type the module is and what port type we need to read and were it.

For 8.x 7-mode head swaps we haven't seen issues in the lab and a recent one at a customer from a 3070 to 3270. I don't remember having to restore from backup option 6 but makes sense having to do that

Re: Possible to upgrade a diskless 6240 via netboot?

Got a picture of the boot device...have seen the blue casing but never opened one to see this yet.  Looks like connecting to a laptop might not be so easy unless someone knows what kind of connector to this device (attached picture)

Re: Possible to upgrade a diskless 6240 via netboot?

Well, the most obvious effect is change of SSH key (and possibly SSL certs as well) and loss of activated diag user. Customization of EMS is also kept in varfs, but it is probably not something done often.

I wish we had KB that described what varfs is actually used for.

Re: Possible to upgrade a diskless 6240 via netboot?

I didn't run into those issues but only a few 8.x head swaps so far. I have had to redo ssl after moving a rootvol.

Sent from my iPhone 4S

Re: Possible to upgrade a diskless 6240 via netboot?

Maybe it makes sense to just upgrade the 6070 to 8.0.2P4, do the head swap and then upgrade to 8.0.3 or 8.1 from there. I'll be upgrading the 6070 immediately before the head swap, so I really don't need to be concerned with the SnapMirror issues present in 8.0.2P4 as I'll only be on that version very briefly.

I have the head swap doc for 8.0.1 and it makes no mention of the "Update flash from backup config" step. Can you elaborate on what that step does and whether it's really necessary?