000-221 · Question #18
A system administrator needs to create a new volume group (VG) which will contain 100 physical volumes. The physical volumes are 10GB in size. The company plans to increase from 100 to 150 physical…
The correct answer is C. Create VG as a Scalable volume group. A Scalable volume group must be used when the number of physical volumes exceeds 128 or is expected to grow beyond that threshold, as it supports up to 1024 PVs.
Question
A system administrator needs to create a new volume group (VG) which will contain 100 physical volumes. The physical volumes are 10GB in size. The company plans to increase from 100 to 150 physical volumes over a two year period. To ensure the VG can meet initial demand and grow without requiring changes at later date, what type of VG should be created?
Options
- ACreate VG as a Big volume group.
- BCreate a volume group setting each physical partition size to 1024 MB.
- CCreate VG as a Scalable volume group.
- DCreate VG using the t-factor attribute
How the community answered
(18 responses)- A6% (1)
- C83% (15)
- D11% (2)
Why each option
A Scalable volume group must be used when the number of physical volumes exceeds 128 or is expected to grow beyond that threshold, as it supports up to 1024 PVs.
A Big volume group supports a maximum of 128 physical volumes, which satisfies the initial 100 PV requirement but cannot accommodate the planned expansion to 150 PVs.
Setting the physical partition size to 1024 MB changes partition granularity and VG storage allocation but does not increase the maximum number of physical volumes a standard or Big VG can contain.
A Scalable volume group supports up to 1024 physical volumes, accommodating both the initial 100 PV requirement and the planned growth to 150 PVs without reconfiguration. This is the only VG type that can satisfy both the current demand and the two-year growth target, since neither a standard VG (max 32 PVs) nor a Big VG (max 128 PVs) can hold 150 PVs.
The t-factor attribute controls logical volume striping and allocation policy across physical volumes and has no effect on the maximum number of physical volumes supported by a volume group.
Concept tested: AIX Scalable volume group PV capacity and growth planning
Source: https://www.ibm.com/docs/en/aix/7.3?topic=management-scalable-volume-groups
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