Multiple LDs (1481) created to grow CPG SSD_r6 do not match default CPG grow parameter

[florinacios]

I have changed the HA on the CPG R6 from Magazine to Cage using the GUI on 3PAR but after that, the checkhealth gives a message that Multiple LDs (1481) created to grow CPG SSD_r6 do not match default CPG grow parameters -t r6 -ssz 8 -p -devtype SSD

This is how it was looking before:

showcpg -sdg SSD_r6
-----(MiB)------
Id Name Warn Limit Grow Args
2 SSD_r6 - - 16384 -ssz 8 -ha mag -t r6 -p -devtype SSD

After:

showcpg -sdg SSD_r6
-----(MiB)------
Id Name Warn Limit Grow Args
2 SSD_r6 - - 20971 -t r6 -ssz 8 -p -devtype SSD

showversion
Release version 3.3.1 (MU5)
Patches: P126,P132,P135,P140,P146,P150,P151,P155,P156,P170,P172,P173,P177,P180,P182

The LDs can be tuned using tuneld but is there any way of doing it at CPG level?

[Cali]

Hi,

with r6, ssz 8 and ha you need a minimum of 4 Drive Shelfs.

Do you have it?

What, if you try to create a new CPG with this parameter?
What is your intention?
I have set up over 120 3PAR and don't know anyone, who uses ha.

Cali

[veeyarvi]

Hi Florinacios,

Without knowing more details about the array configuration (like number of cages, number of SSD drives, how they are populated in each cages etc.), we cannot comment further.

Regards,

Veeyaarvi

[florinacios]

Hello,

The storage has 4 controller nodes, 8 cages, each with 24 physical drives.

Best regards

[Cali]

Looks ok to me so far.

Are you running out of Capacity, now or in the past?

Is the CPG Grow Setting minimum of 16GB set?

A lot of things to clear, better to involve Support.

[florinacios]

No issues with capacity and the growth increment has been set to 0.02 TiB, the minimum accepted. I have a ticket opened in the meantime. Thanks for the reply.

[Mahesh202]

To answer your question on whether The LDs can be tuned using Tuneld but is there any way of doing it at CPG level?

Yes, you can do it with the below commands.
Compactcpg reclaims unused space in CPGs. There are background tasks that run automatically to try to recover space from TPVVs.
Setcpg will allow you to change cpg growth options.
Tunesys will fix volumes that don't match CPG attributes if you have enough free space.

It may be helpful for you to refer to the commands as and when required, however, as you have already raised a support ticket I would suggest you follow up with 3PAR technical support to resolve the issue.

Hope this helps.!! 

Regards
Mahesh

[florinacios]

Hello,

I ran a compactcpg and also a tunesys but none of them fixed the issue.

2024-03-18 10:00:46 UTC Updated     *********************************************************
2024-03-18 10:00:46 UTC Updated     * Phase 3: LD tuning will not be performed.
2024-03-18 10:00:46 UTC Updated     * Reason: No LD re-layout tunes needed.

Only performing tuneld on every ld from that CPG, drops the number.

[veeyarvi]

Hi Florinacios,

Since this needed more analysis and review of logs, I suggest to continue with the support case already opened with HPE.

Regards,
Veeyaarvi