In NetApp ONTAP 9.14.1, the maximum supported size for a single LUN is 128 TiB. This limit applies to most mid-range and high-end AFF and FAS platforms. It is important to note that certain entry-level platforms, such as the AFF A200, AFF C190, and FAS2700 series, are restricted to a smaller maximum LUN size of 16 TiB. However, since the question asks for the maximum size possible with the software, 128 TiB is the correct answer.

A. 16TiB is the maximum LUN size for specific entry-level platforms, not the overall maximum for ONTAP 9.14.1 software.

B. 64TiB is not a documented maximum LUN size limit for any platform series in ONTAP 9.14.1.

D. 300TiB exceeds the documented architectural limit for a single LUN in the ONTAP 9.14.1 release.

1. NetApp ONTAP 9.14.1 SAN Configuration Guide: In the section "LUNs

" under the subsection "LUN configuration overview

" the documentation states

"The maximum LUN size is 128 TB for all platforms except for AFF A200

AFF C190

FAS2600 series

and FAS2700 series systems

which have a maximum LUN size of 16 TB." (Note: In the context of ONTAP commands and architecture

TB is used interchangeably with TiB).

Source: NetApp Product Documentation

ONTAP 9.14.1

SAN Configuration Guide.

2. NetApp Hardware Universe (HWU): This official tool provides detailed configuration limits for all NetApp hardware and software combinations. When selecting a high-end platform (e.g.

AFF A900) with ONTAP 9.14.1

the "SAN Limits" section explicitly lists "Max LUN Size (TB): 128". Conversely

selecting an entry-level platform (e.g.

AFF C190) shows "Max LUN Size (TB): 16".

Source: hwu.netapp.com (Accessed for ONTAP 9.14.1 data).

3. NetApp Technical Report TR-4067: SAN Best Practices: This document reinforces the LUN size limits. Section 3.1

"LUN Configuration

" discusses sizing and notes the platform-dependent maximums

aligning with the 128 TiB limit for higher-end systems.

Source: NetApp Technical Report TR-4067

Section 3.1.