Insufficient memory available to IO Group error
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Insufficient memory available to IO Group error
While using IBM Storwize V5000 Gen2 storage server, during creation of a new raid group (Storage pool), we can get following error:
CMMVC6532E The command cannot be initiated because there is insufficient free memory that is available to the I/O group.
This error is due to lack of memory in iogroup which can be increased by connecting to storage over putty and using following commands:
- lsiogrp -delim :
- To look for all iogroups. As such only iogroup 0 might be used.
- lsiogrp -delim : <iogroup number>
- To get details of iogroup 0
- See the RAID memory allocation listed in above details for concerned iogroup
- Increase the iogroup memory for raid using:
- chiogrp -feature raid -size <new-size> <iogroup number>
In our experience increasing from 40MB to 45MB resolved the issue.
Related links for study
- What is an IO Group
- https://www.ibm.com/support/knowledgecenter/STVLF4_8.1.0/spectrum.virtualize.810.doc/svc_iogroupovr_1bchag.html
- Memory (Bitmap space) requirements for copy services, volume mirroring or RAID
- https://www.ibm.com/support/knowledgecenter/STHGUJ_7.8.1/com.ibm.storwize.v5000.781.doc/svc_usecopyservmemtask_3t4ljl.html -
- Get details of an iogroup, specifically "RAID total memory" and "RAID free memory"
- https://www.ibm.com/support/knowledgecenter/STHGUJ_7.8.1/com.ibm.storwize.v5000.781.doc/svc_lsiogrp_21pdk1.html
- Change IO group memory allocation for flash, raid, etc.
- https://www.ibm.com/support/knowledgecenter/STHGUJ_7.8.1/com.ibm.storwize.v5000.781.doc/svc_modifyiogroup_21ifvl.html
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