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Re: Epsilon and root move from an aggregate to anoter

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Hi there,

 

As you've experienced service disruption at a client site, I would suggest you should log a support case with our support centre, and ask for clarification of the documentation and correct steps to avoid an outage in the future.

 

I've brought this issue and this thread to the attention of the writer of that KB article.


Re: Perfstat 8.4 hang during gethering data.

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Hi. thank you for reply.

 

that URL maybe for internal only.

 

I can't access that URL with partner level.

 

Yes. I will try this  --exclude="command=netstat"   today.

But what if Tech center need "netstat" , so I shoud find the main reason. ^^

 

I will post after running perfstat with exclude "netstat"

Ontap Select- ESXi host not discovered while creating cluster

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Hi All,

 

I have deployed the Ontap Select 9.3 in our setup. assigned the IP details to ontap select. I can able to access the ontap select administrator console from web client. As I added the ESXi hypervisor host without vcenter. SO I create the new cluster, enter the cluster details and next step needs to select the ESXi host but there is no ESXi host discovered. So kindly help me to deploy the ontap select. For your information find the below ontap select and ESXi details, also find the attached screenshot.

 

Ontap Select - 9.3
ESXi version - 6.5
Vcenter server - NA

 

 

Regards,

Manikandan S

 

 

recocovery of a deleted volume 7m

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Can we able to recover Volumes from netapp 7M post a deletion (no snap ,no snapmirror ) 

Any option likve VRQ in 8.3 ?the version is 8.1.X

Re: recocovery of a deleted volume 7m

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The only known way is aggregate snapshots.

Re: Perfstat 8.4 hang during gethering data.

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Hi savander,

apologies for that I did not check the availability of the KB article.

Sometimes perfstat can fail for various reasons, such as network latency or really high load on the controllers too, so it's important to understand what is causing it for sure.

In case the netstat output is needed by support, you might look into disabling some other unneeded collection for that perfstat; however support will be able to guide you in what to collect if you need to perform a partial collection.

Re: Epsilon and root move from an aggregate to anoter

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Hi,
thank you for the quick answer.
Is the thing that I should do also because customer need some official position before to let us the steps with inverse path. Otherwise he will plan an outage.

Another experienced Se told me that the sequence should be inverted also because if you look at the sequence after the reboot in that kb epsilon eleggibilità is the first thing so that it should be the last after aggr relocation and life move.

Regards

Re: Epsilon and root move from an aggregate to anoter

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Just for clarification, what Giacomo is refering to is this:

 

Hmmmmm, 

 
Going through the steps in the KB, I would have done the epsilon and eligibility steps (Step 1 in the KB) right before the reboot (Step 8), *after* moving the aggregate and the LIFs away from the node to be worked on. 
 
At that point in time it shouldn't disturb anything, since no user traffic should pass through this nodes interfaces or disks.
 
What do you think? 
(I'm a little unclear about the meaning of "NFS was restarted", but I have a feeling the above change in sequence should help)
 
Also, if you look at the revert steps, the KB first restores eligibility and HA failover and only at the end reverts aggregates and LIFs.
 
Regards
 
Sebastian

Re: Epsilon and root move from an aggregate to anoter

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Thank you very much Sebastian.

Now we'll attempt to have some official answer by support on the sequence that you're suggesting, and on which I completely agree as suspected after that fault.

 

My best regards,

Changing number of disks in the root aggregate

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We have a system that is configured as follows:

 

FAS8020, DataONTAP : 8.3.2 P2 HDD size 2.0TB SATA

 

Name                           Node                 Type          used%            Available               Used                   Total                  Volume Count                   Disk Count

 

System_A_aggr01   System_A           Std            2                      51.38TB                 1.01TB                52.39TB               2                                          42

 

System_A_root         System_A           Std            32                   2.83TB                 1.32TB                4.15TB                  1                                         5

 

System_B_aggr01   System_B          Std            2                      51.38TB                 1.01TB                52.39TB                2                                          42

 

System_B_root         System_B          Std           32                    2.83TB                 1.32TB                4.15TB                   1                                          5

 

Only 1 spare drive per system. All HDD used.

 

Client has decided they want to increase the number of spares by reducing the root aggregate from 5 to 3 HDD. There is one SVM defined and although there is only a small amount of data on it they would prefer to preserve that if possible.

 

What is the best way to achieve this? Worse case is trashing the system and rebuild it, but we'd prefer not to if we can avoid it

 

Is it  possible to drop disks out of an aggregate providing there is sufficent remaining capacity to hold the data on the reduced number of disks?

 

My experience of DataONTAP is very limited so any guidance will be very much appreciated.

 

Many thanks

 

Chris

 

 

 

Re: Changing number of disks in the root aggregate

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There is no way to remove data disks from aggregate. It is possible to convert RAID_DP into RAID4 by removing one parity disk (but RAID4 is frowned upon today). Alternatively you can build new aggregate (it can use minimal number of disks initially, even 2, so you can utilize existing spares) and relocate root volume to this aggregate, then destroy original root aggergate. Relocating root volume is possible non-disruptively in your case (but see http://community.netapp.com/t5/Data-ONTAP-Discussions/Epsilon-and-root-move-from-an-aggregate-to-anoter/m-p/138789#M30619 for caveats).

Re: Changing number of disks in the root aggregate

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Thanks for the swift reply. I'll review the procedure. If I used the two spares to make a new aggregate I guess you can simply add a 3rd disk later after the original root aggregate has been deleted and more drives become available?

 

Otherwise I would need to delete the data aggregate to release sufficient disks to make a new one. That isn't a major problem as the small amout of data that exists (<1GB) can easily be copied elsewhere.

 

Chris

 

 

 

Re: Changing number of disks in the root aggregate

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wrote:

I guess you can simply add a 3rd disk later after the original root aggregate has been deleted and more drives become available?


Correct. You can both go from RAID4 to RAID_DP as well as add more data disks.

Re: recocovery of a deleted volume 7m

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I think there is an option in new ONTAP versions where the volume is not actually deleted until x hours later. 

 

I think it can be set to X as well. If I remember correctly its 6 hour by default. 

 

So it all depends on how fast you are . 

Re: High data modification problem with snapmirror fills the volume / LUN

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hi

 

if you only have that snapmirror base snap: i would say that you need to run it more frequently or increase the volumes size, not much way around it.

 

if you have multiple snapshots and not just the base one of snapmirror. you can enable sanp auto-delete, but that's a risk as it might get to the base snapshot at the end and break the snapmirror.

 

 

Gidi


Re: Changing number of disks in the root aggregate

Re: recocovery of a deleted volume 7m

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Hi,

 

 

AS per knowledge you can't recovery deleted volume on the  7-mode without aggreagate snapshot.

 

 

There is options C-dot after 8.3 

 

cdot::>vserver show -fields volume-delete-retention-hours

 

you can set retenation hours for if you delete volume  between retention hours you can recover the volume. 

 

Thank you,

Sandilyan

 

 

 

 

Re: recocovery of a deleted volume 7m

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In worst case scenarios, recovery by third party providers such as Kroll Ontrack or Drive Savers may be possible (at the expense of availability of other volumes) - this KB article outlines the options, but we do not provide endorsement of any of their services.

Re: recocovery of a deleted volume 7m

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Hi,

 

In 7-mode system there is no way to get deleted volumes back without aggregate snapshots.

 

Mostly, aggregate snapshots using for a SyncMirror purpose, you should check it.

Constant changes to OnCommand System Manager disruptive to smooth operations

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I'd like to send this to the powers that be in the ONTAP 9.3x product line:

 

Please stop making these drastic changes to OCSM.

 

They are disruptive, annoying, and painful.

 

I like the the tree view on the left in 9.3.  However, many items are not arranged in such manner, case in point, volumes.

 

When you look at volumes, they display only in the main OCSM frame.  There are no details, or commands available, unless you expand the volume (in the main frame), and then find the small print link at the bottom right of the expanded paragraph, "Show more details".

 

Then you get a new main frame with commands split between some shortcuts at the top left, and a menu at the top right.

 

And if you try to view volume info quickly, this arrangement will not allow it.  You must go back to the tree view and start over.

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