User Mapping in FA File: On a Pure Storage FlashArray, User Mapping is the mechanism that translates identities between different protocols (like mapping a Windows SID to a Unix UID/GID) or between an external directory service (like Active Directory or LDAP) and the local file system permissions.
The Impact of Disabling Mapping: When User Mapping is disabled on an active NFS export, the FlashArray can no longer resolve the identity of the user attempting to access existing files. Because NFS (specifically NFSv3 and NFSv4.1 supported by Pure) relies on these identifiers to verify file ownership and ACLs, existing files—which are tagged with specific owner IDs—become effectively " orphaned " from the perspective of the incoming request.
Access vs. Creation: * Existing Files: Accessibility is lost because the system cannot verify that the user has the rights to read or modify the file without the mapping logic.
New Files: Interestingly, in many " No Mapping " configurations, a user may still be able to create new files (often defaulting to a ' nobody ' or ' anonymous ' UID depending on the export rules), but they will immediately lose the ability to manage or access them once created because the mapping link is broken.
Real-time Application: Unlike some legacy storage systems that require a service restart, Purity applies export policy changes dynamically . As soon as the " User Mapping " toggle is disabled, the logic is removed from the data path, impacting active sessions immediately.
Question # 25
What is unified storage for Pure?
Options:
A.
FlashArray runs both NFS and SMB protocols.
B.
FlashArray runs both iSCSI and Fibre Channel (FC) protocols.
C.
FlashArray runs both Block and File level protocols.
Defining Unified Storage: In the storage industry, " Unified Storage " refers to a single storage platform that can simultaneously serve data over both block-level and file-level protocols.
The Pure Storage Approach: Historically, FlashArray was a high-performance block-only array. However, with the introduction of FlashArray File Services , Pure transitioned to a unified architecture. This means the same hardware (FlashArray//X, //C, or //XL) and the same management interface (Purity) handle both types of workloads.
Protocol Support:
Block Protocols: Fibre Channel (FC), iSCSI, and NVMe-over-Fabrics (NVMe-oF).
Why this is "Unified": * Shared Pool of Resources: Unlike older legacy systems that used " file gateways " or separate hardware heads for NAS, Pure’s unified storage shares a single global pool of flash memory and deduplication metadata.
Ease of Management: Administrators don ' t need to manage two different systems. You can create a Volume (Block) or a File System (File) from the same " Add " menu in the GUI.
Why Options A and B are incorrect: * Option A only describes the File side of the equation.
Option B only describes the Block side of the equation.
Only Option C accurately captures the combination of both paradigms, which is the definition of " Unified. "
