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NetApp NS0-521 Exam - Topic 7 Question 37 Discussion

What Is a recommended setting for using the NetApp ONTAP LUN fractional reserve?
C) Space guarantee is set to volume.
A) LUN space reservation is disabled.
B) Space allocation is set to enable.
D) Volume Snapshot copy automatic deletion is disabled.

NetApp NS0-521 Exam - Topic 7 Question 37 Discussion

Actual exam question for NetApp's NS0-521 exam
Question #: 37
Topic #: 7
[All NS0-521 Questions]

What Is a recommended setting for using the NetApp ONTAP LUN fractional reserve?

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Suggested Answer: C

The recommended setting for using the NetApp ONTAP LUN fractional reserve is to set the space guarantee to 'volume'. This setting ensures that the required space for overwrites in the volume is reserved, preventing potential write failures when snapshot copies are created. This setup helps in maintaining the performance and reliability of the storage system by ensuring there is always enough space allocated for the LUN.

For further details, you can refer to:

NetApp Community Discussion on Fractional Reserve

NetApp Documentation on Space Management


by Glenn at May 14, 2026, 02:30 PM

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Simona
4 days ago
Surprised that some still use D) Volume Snapshot copy automatic deletion is disabled.
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Paris
10 days ago
I think B) Space allocation is set to enable is better for flexibility.
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Refugia
15 days ago
Totally agree, it helps with efficiency!
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Cyril
20 days ago
A) LUN space reservation is disabled is often recommended.
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Kayleigh
25 days ago
Wait, is it really best to disable Snapshot copy deletion? That sounds risky!
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Carmen
1 month ago
C) Space guarantee is set to volume is the way to go!
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Rebbeca
1 month ago
I thought B) Space allocation is set to enable was better?
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Vincent
1 month ago
Totally agree, it helps with efficiency!
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Markus
2 months ago
A) LUN space reservation is disabled is usually recommended.
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Miles
2 months ago
If I recall correctly, disabling LUN space reservation could lead to issues, so I think option A is probably not recommended.
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Casie
2 months ago
I’m a bit confused about the difference between space allocation and space guarantee. I think I need to review that section again.
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Anna
2 months ago
I practiced a similar question, and I feel like option C might be the right choice since it mentions volume guarantees.
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Shawna
4 months ago
I think I remember that fractional reserve is about how much space is reserved for snapshots, but I'm not sure which setting is best for that.
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