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3par balancing disks
https://3parug.com/viewtopic.php?f=18&t=3455
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Author:  terminus [ Thu Jul 30, 2020 3:43 am ]
Post subject:  3par balancing disks

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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Author:  MammaGutt [ Thu Jul 30, 2020 8:31 am ]
Post subject:  Re: 3par balancing disks

How are they physically installed? If the hardware is unbalanced, the chunklets will be unbalanced.

Author:  markinnz [ Fri Jul 31, 2020 3:44 am ]
Post subject:  Re: 3par balancing disks

What are your CPGs configured like ? Have you restricted CPGs to particular disks ? Got an odd CPG config ?

Author:  terminus [ Wed Aug 12, 2020 7:45 am ]
Post subject:  Re: 3par balancing disks

contacted support

everything to be good

forgot to indicate what is used AO (tiering)

thx to all

Author:  MammaGutt [ Wed Aug 12, 2020 10:47 am ]
Post subject:  Re: 3par balancing disks

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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