NS0-155 Netapp Data ONTAP 7-Mode Administrator Free Practice Exam Questions (2025 Updated)

Ensure that both plexes of the mirrored aggregate you are splitting are online and operational.

https://library.netapp.com/ecmdocs/ECMP1196991/html/GUID-DE08C404-6E9C-47F6-A72E-CDEE2043408C.html

https://library.netapp.com/ecmdocs/ECMP1196889/html/GUID-83A15F85-92A1-4EA8-A9EC-B9E0E2269E37.html

Volume SnapMirror operates at the physical block level. It replicates the contents of an entire volume, including all Snapshot copies, plus all volume attributes verbatim from a source (primary) volume to a target (secondary) volume. Implicitly, the destination volume will be the same as the source volume. Since C is incorrect, A & B must be correct.

Qtree snapmirror operates at the logical level, so it is unimportant that the destination system has a different volume configuration.

ndmpcopy is similarly operating with data already read from the volume and so the destination volume type is not a consideration.

This question implies that there is an issue with the clustering of the two controllers. Since this is the case you will want to run the cluster configuration checker to identify and resolve any issues.

https://library.netapp.com/ecmdocs/ECMM1278349/html/upgrade/upgrading/concept/c_oc_upg_b4_active2.html

https://library.netapp.com/ecmdocs/ECMP1196890/html/man1/na_stats.1.html

http://backdrift.org/man/netapp/man5/na_stats_preset.5.html

Data ONTAP provides some XML files that output a predetermined set of statistics that you can use without having to construct a script or type in a complicated command on the command line.

The preset files are located in the /etc/stats/preset directory. To use a preset file, you add -p filename to your stats show or stats stop command line. You can also add counters on the command line. If any options you specify on the command line conflict with the preset file, your command line options take precedence.

You can also create your own preset files.

https://communities.netapp.com/servlet/JiveServlet/previewBody/4791-102-2-13466/tr-3466.pdf

In order to restrict the NetApp secondary systems that are allowed to initiate backups from an OSSV host, the QSM Access List field can be populated with the hostname of the secondary using the OSSV Configurator utility. When using this option, make sure the “Check QSM Access List” box is enabled.

The snapvault.access option on the NetApp secondary can be used to restrict the OSSV hosts that are allowed to initiate restores from that secondary system. This option can be populated with a list of hostnames for each OSSV host. For example:

options snapvault.access host=ossv1,ossv2,ossv3

Screenshot of the svconfigurator GUI; note the QSM access list checkbox and field.

https://library.netapp.com/ecmdocs/ECMP1196890/html/man1/na_exportfs.1.html

exportfs [ -v ] [ -io options ] path -i Ignores the options specified for a file system path in the /etc/exports file. If you do not specify the –I option with the -o option, Data ONTAP uses the options specified for the file system path in the /etc/ exports file instead of the options you specify on the command line.

* Unix-like operating systems identify users within the kernel by an unsigned integer value called a user identifier, often abbreviated to UID or User ID. The range of UID values varies amongst different systems; at the very least, a UID represents a 15-bit integer, ranging between 0 and

The UID value references users in the /etc/passwd file. Shadow password files and Network Information Service also refer to numeric UIDs. The user identifier has become a necessary component of Unix file systems and processes.

* In POSIX-compliant environments the command-line command id gives the user's user identifier number as well as more information on the user account like the user name, primary user group and group identifier (GID).

* Files and directories are owned by a user. The owner determines the file's owner class. Distinct permissions apply to the owner.

Files and directories are assigned a group, which define the file's group class. Distinct permissions apply to members of the file's group members. The owner may be a member of the file's group.

Users who are not the owner, nor a member of the group, comprise a file's others class. Distinct permissions apply to others.

The effective permissions are determined based on the user's class. For example, the user who is the owner of the file will have the permissions given to the owner class regardless of the permissions assigned to the group class or others class.

http://hd.kvsconsulting.us/netappdoc/801docs/html/ontap/smg/GUID-866DD79D-D2A6-4FBA-B0BDA63560FECEFF.html

https://library.netapp.com/ecmdocs/ECMP1196891/html/GUID-F6304830-B124-40A5-95D6-C646AA85E9E0.html

Only hostnames and IPs are referenced in /etc/hosts, so A is incorrect. The question states that the qtree was mounted, and B and D would preclude this so they are incorrect.

You need to set a qtree to mixed or unix security style to support UNIX users.

https://library.netapp.com/ecmdocs/ECMP1196979/html/man1/na_lun.1.html

lun set reservation lun_path [ enable | disable ]

Enables or disables the space reservation on the LUN. If no arguments are supplied after the lun_path, then the space reservation status of the given lun_path is displayed.

lun create -s size -t ostype [ -o noreserve ] [ -e space_alloc ] lun_path

This usage of the lun create command should be employed to create a new LUN of given size, with initially zero contents. The LUN is created at the lun_path given. No file should already exist at the given lun_path. The directory specified in the lun_path must be a qtree root directory.

The size is specified in bytes. Optionally, a number followed by a one-character multiplier suffix can be used: c (1), w (2), b (512), k (1024), m (k*k), g (k*m), t (m*m).

The size of the created LUN could be larger than the size specified, in order to get an integral number of cylinders while reporting the geometry using SAN protocols.

The size of the LUN actually created is reported if it is different from that specified in the command.

The mandatory ostype argument is one of: solaris (the LUN will be used to store a Solaris raw disk in a singleslice partition), windows (the LUN will be used to store a raw disk device in a single-partition Windows disk using the MBR (Master Boot Record) partitioning style), hpux (the LUN will be used to store HP-UX data), aix (the LUN will be used to store AIX data), vld (the LUN contains a SnapManager VLD), linux (the LUN will be used to store a Linux raw disk without any partition table), netware (the LUN will be used to store NetWare data), vmware (the LUN will be used to store VMware data), windows_gpt (the LUN will be used to store Windows data using the GPT (GUID Partition Type) partitioning style), windows_2008 (the LUN will be used to store Windows data for Windows 2008 systems), openvms (the LUN will be used to store Open-VMS data), xen (the LUN will be used to store Xen data), hyper_v (the LUN will be used to store Hyper-V data), solaris_efi

By default, the LUN is space-reserved. To manage space usage manually, -o noreserve can be specified.

Using this option will create a LUN without any space being reserved. Provisioning threshold events can be enabled by specifying -e space_alloc option. This option has to be used in conjunction with -o noreserve.

lun map [ -f ] lun_path initiator_group [ lun_id ]

Maps a LUN to all the initiators in the supplied group. If a LUN ID is not specified, the smallest number that can be used for the various initiators in the group is automatically picked. Note that this command can be used multiple times to configure multiple maps for a LUN, or for an initiator group. Once created, you can use lun show -m to list all the LUN mappings.

The optional -f argument disables checking with the HA partner for LUN mapping conflicts.

http://backdrift.org/man/netapp/man1/na_sysstat.1.html

-s

Display a summary of the output columns upon termination, descriptive columns such as `CP ty' will not have summaries printed. Note that, with the exception of `Cache hit', the `Avg' summary for percentage values is an average of percentages, not a true mean of the underlying data. The `Avg' is only intended as a gross indicator of performance. For more detailed information use tools such as na_nfsstat, na_netstat, or statit.

https://library.netapp.com/ecmdocs/ECMP1196979/html/man1/na_snapmirror.1.html

snapmirror initialize [ -S source ] [ -k kilobytes ] [ -s src_snap ] [ -c

create_dest_snap ] [ -w ] destination Starts an initial transfer over the network. An initial transfer is required before update transfers can take place.

The initialize command must be issued on the destination node. If the destination is a volume, it must be restricted (see na_vol(1) for information on how to examine and restrict volumes). If the destination is a qtree, it must not already exist (see na_qtree(1) for information on how to list qtrees). If a qtree already exists, it must be renamed or removed (using an NFS or CIFS client), or snapmirror initialize to that qtree will not work.

snapmirror resync [ -n ] [ -f ] [ -S source ] [ -k kilobytes ] [ -s src_snap ]

[ -c create_dest_snap ] [ -w ] destination Resynchronizes a broken-off destination to its former source, putting the destination in the snapmirrored state and making it ready for update transfers. The resync command must be issued on the destination node.

https://library.netapp.com/ecmdocs/ECMP1196979/html/man1/na_snapmirror.1.html

snapmirror resync

[ -n ] [ -f ] [ -S source ] [ -k kilobytes ] [ -s src_snap ] [ -c

create_dest_snap ] [ -w ] destination

Resynchronizes a broken-off destination to its former source, putting the destination in the snapmirrored state and making it ready for update transfers. The resync command must be issued on the destination node.

The resync command can cause data loss on the destination. Because it is effectively making destination a replica of the source, any edits made to the destination after the break will be undone.

For formerly mirrored volumes, the resync command effectively performs a SnapRestore (see na_vol

(1)) on the destination to the newest snapshot which is common to both the source and the destination. In most cases, this is the last snapshot transferred from the source to the destination, but it can be any snapshot which is on both the source and destination due to SnapMirror replication. If new data has been written to the destination since the newest common snapshot was created, that data will be lost during the resync operation.

https://communities.netapp.com/groups/chris-kranz-hardware-pro/blog/2009/03/05/fractional-reservation--lunoverwrite

From the article:

"If you reduce the Fractional Reservation to 0, you need to make sure the rate of change is within the volume size, or you need to make sure the volume can auto-grow when required or even snap auto-delete to reduce the reserved blocks and free up space (although I am not a huge fan of snap auto-delete for various reasons)."

https://library.netapp.com/ecmdocs/ECMP1196979/html/man1/na_snapmirror.1.html

https://library.netapp.com/ecmdocs/ECMP1196979/html/man5/na_snapmirror.conf.5.html

snapmirror update [ -S source ] [ -k kilobytes ] [ -s src_snap ] [ -c

create_dest_snap ] [ -w ] destination

For asynchronous mirrors, an update is immediately started from the source to the destination to update the mirror with the contents of the source.

For synchronous mirrors, a snapshot is created on the source volume which becomes visible to clients of the destination volume.

The snapmirror update command must be issued on the destination filer.

snapmirror release source { filer:volume | filer:qtree }

Tell SnapMirror that a certain direct mirror is no longer going to request updates.

If a certain destination is no longer going to request updates, you must tell SnapMirror so that it will no longer retain a snapshot for that destination. This command will remove snapshots that are no longer needed for replication to that destination, and can be used to clean up SnapMirror-created snapshots after snapmirror break is issued on the destination side.

The source argument is the source volume or qtree that the destination is to be released from. The destination argument should be either the destination filer and destination volume name or the destination filer and destination qtree path. You can use a line from the output of the snapmirror destinations command as the set of arguments to this command. The /etc/snapmirror.conf file exists on the node containing the mirror used for SnapMirror.