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 Post subject: 3par balancing disks
PostPosted: Thu Jul 30, 2020 3:43 am 

Joined: Tue Feb 20, 2018 3:11 pm
Posts: 34
hello

so

3par 8400 2 nodes
HPE 3PAR OS version
Current 3.3.1.410 (MU2)+P32,P40,P45,P51,P52,P76,P80,P90,P93,P96,P111,P113,P115,P127

- the disks have an uneven distribution of disk space

for example
2020-07-30 11:08:25 MSK Updated PD 4 Devtype FC chunks free 975 total 1675 utilization 41%
2020-07-30 11:08:25 MSK Updated PD 12 Devtype FC chunks free 1228 total 1675 utilization 26%
2020-07-30 11:08:25 MSK Updated PD 13 Devtype FC chunks free 950 total 1675 utilization 43%
2020-07-30 11:08:25 MSK Updated PD 14 Devtype FC chunks free 1242 total 1675 utilization 25%
2020-07-30 11:08:25 MSK Updated PD 16 Devtype FC chunks free 951 total 1675 utilization 43%
2020-07-30 11:08:25 MSK Updated PD 17 Devtype FC chunks free 1217 total 1675 utilization 27%


when i try tunesys, its does not help

q:
how to balancing disks ?




sorry for my english


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 Post subject: Re: 3par balancing disks
PostPosted: Thu Jul 30, 2020 8:31 am 

Joined: Mon Sep 21, 2015 2:11 pm
Posts: 1139
Location: Europe
How are they physically installed? If the hardware is unbalanced, the chunklets will be unbalanced.

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 Post subject: Re: 3par balancing disks
PostPosted: Fri Jul 31, 2020 3:44 am 

Joined: Tue Mar 29, 2016 9:32 pm
Posts: 125
What are your CPGs configured like ? Have you restricted CPGs to particular disks ? Got an odd CPG config ?


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 Post subject: Re: 3par balancing disks
PostPosted: Wed Aug 12, 2020 7:45 am 

Joined: Tue Feb 20, 2018 3:11 pm
Posts: 34
contacted support

everything to be good

forgot to indicate what is used AO (tiering)

thx to all


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 Post subject: Re: 3par balancing disks
PostPosted: Wed Aug 12, 2020 10:47 am 

Joined: Mon Sep 21, 2015 2:11 pm
Posts: 1139
Location: Europe
terminus wrote:
contacted support

everything to be good

forgot to indicate what is used AO (tiering)

thx to all


I still find that very weird. AO works per node pair, not node. So the utilization should be equal on all drives in the same cage.

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