D-PSC-DY-23 Dell PowerScale Deploy Practice Questions

The ID Mapper service is the specific OneFS component responsible for mapping user identifiers between different environments, such as a Windows SID and a Linux UID/GID. It maintains a database of these mappings to ensure a user is recognized as the same entity regardless of the access protocol used, thereby providing consistent permissions.

False. OneFS enables virtual hot spare (VHS) by default and never uses dedicated spare drives. VHS reserves free space in each node pool, set as 1–4 virtual drives and/or 0–20% of capacity (whichever is larger applies); new clusters default to 1 virtual drive. When a drive fails, OneFS rebuilds its data into that reserved free space.

This configuration correctly meets all requirements. The hard limit at 10GB provides the absolute cap. The soft limit at 8GB triggers the warning. The grace period of 7 days allows the user to exceed the soft limit for that duration. Once the grace period expires, the soft limit is enforced like a hard limit, blocking writes until the usage is reduced below 8GB.

OneFS automatically creates (autoprovisions) a node pool from at least three equivalent nodes. A tier is a user-created logical grouping of one or more node pools, and file pool policies can use it as a storage target. For example, a 'Performance' tier could hold both an F-series node pool and an H-series node pool. Node pools are the building blocks of tiers, not the other way round.

Server-side copy lets SMB 2 and later clients have the copy performed on the cluster: OneFS reads and writes the file data only on the server, avoiding the network round-trip through the client. It works only when the source and destination handles are open on the same share (not across shares). In OneFS 9.5 it is enabled by default and is a global setting (isi smb settings global modify --server-side-copy) that can only be disabled system-wide, not per share. It is incompatible with SMB continuous availability: when a persistent handle is open on a CA share, server-side copy is disabled for that file.

SmartLock in Compliance mode is the correct choice because it enforces strict WORM (Write Once, Read Many) rules that prevent anyone, including administrators, from modifying or deleting files before the retention period expires. This meets the stringent regulatory requirements. Enterprise mode allows privileged deletes by an administrator, which would violate the requirement. SnapshotIQ protects data but doesn't prevent deletion of the original file. RBAC restricts access but does not enforce immutability.

isi statistics client shows the most active clients by protocol, including each client's remote address and the node serving it. --nodes all reports every node (the default), and --long shows all columns. In OneFS 9.5, isi statistics has no system subcommand, isi statistics protocol has no --total option (it has --totalby), and isi statistics query takes current or history with --keys, not --stats.

SnapshotIQ uses both strategies and OneFS dynamically chooses one per situation; administrators cannot select it. With copy on write, the old blocks are first copied out to the snapshot version and then the new data is written, which is a double-write penalty but keeps the HEAD file less fragmented. CoW is most prevalent in OneFS and is used for small changes, inodes and directories. Redirect on write avoids the double write by writing changes to free space, at the cost of more fragmentation, so OneFS uses it for larger changes such as deletes and large sequential writes. No snapshot reserve is required.

Access Control Lists (ACLs) are required for this scenario. Standard POSIX permissions only allow for one owner, one group, and 'other', and do not support explicit deny entries for specific users. ACLs provide the necessary granularity to add multiple access control entries (ACEs), allowing permissions to be set for the devops group while simultaneously adding an explicit deny ACE for the jdoe user.

SyncIQ replicates file data and metadata but not system configuration such as access zones, and Dell's failover procedure assumes that the target cluster already emulates the source configuration, including licensing, access zones, SmartConnect, shares and authentication providers. Creating the corresponding access zones on the secondary cluster before the first replication job (target directories become read-only afterward) keeps the multi-tenant layout after failover. Joining the secondary cluster to the same Active Directory domain lets the identities that SyncIQ replicates as SIDs resolve to the same users and groups. Identical hardware, a shared SSIP and a newer OneFS version are not failover prerequisites.

SyncIQ replicates file data and metadata but not system configuration such as access zones, and Dell's failover procedure assumes that the target cluster already emulates the source configuration, including licensing, access zones, SmartConnect, shares and authentication providers. Creating the corresponding access zones on the secondary cluster before the first replication job (target directories become read-only afterward) keeps the multi-tenant layout after failover. Joining the secondary cluster to the same Active Directory domain lets the identities that SyncIQ replicates as SIDs resolve to the same users and groups. Identical hardware, a shared SSIP and a newer OneFS version are not failover prerequisites.