NS0-155 Online Practice Questions and Answers

Correct Answer: CD

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.

Correct Answer: A

http://en.wikipedia.org/wiki/Logical_Unit_Number_masking Logical Unit Number Masking or LUN masking is an authorization process that makes a Logical Unit Number available to some hosts and unavailable to other hosts.

Correct Answer: D

https://library.netapp.com/ecmdocs/ECMP1196979/html/man1/na_snapmirror.1.html The root volume is always vol0 and etc is contained therein. When exporting the root volume via NFS, the path is/vol/vol0; so the full path to snapmirror log

files is /vol/vol0/etc/log.

/etc/log/snapmirror.

This file logs SnapMirror activity. Log file for current week. /etc/log/snapmirror.[0-5] SnapMirror log files for previous weeks.

Correct Answer: D

https://kb.netapp.com/support/index?

Page=contentandid=2010134andactp=LIST_RECENTandviewlocale=en_USandsearchid=1296570465177 The svpassword command is available on the OSSV host as part of the agent binaries in the path \netapp\snapvault\bin.

Correct Answer: ABC

https://communities.netapp.com/servlet/JiveServlet/previewBody/4803-102-1-6405/tr-3548.pdf http:// backdrift.org/man/netapp/man1/na_license.1.html In preparation for a fabric attached metrocluster configuration, the following licenses must be installed: Cluster syncmirror _local cluster_remote syncmirror_fabric and syncmirror_remote are not valid license types.

Correct Answer: B

Correct Answer: C

snap restore [ -A | -V ] [ -f ] [ -t vol | file ] [ -s snapshot_name ] [ -r restore_as_path ] vol_name | restore_from_path See more at: http://wafl.co.uk/snap/#sthash.nJiEwxGV.dpuf

Correct Answer: B

snapmirror resume destination Resumes transfers to destination. The snapmirror resume command can be used either to abort a snapmirror quiesce in progress or undo a previously completed snapmirror quiesce. The command restores the state of the destination from quiescing or quiesced to whatever it was prior to the quiesce operation. http://wafl.co.uk/snapmirror/#sthash.5u3eilbK.dpuf

Correct Answer: C

SyncMirror is essentially a RAID-1 mirror; hence the name. The best practice is to mirror storage of equal performance; i.e. identical RAID groups and disk sizes (number of spindles, IOPS). If you were to mirror two storage devices of different performance, the slower device would be the limiting factor.

Correct Answer: AD

https://communities.netapp.com/servlet/JiveServlet/previewBody/4803-102-1-6405/tr-3548.pdf

It is important to remember that this is the case only when a complete site is lost. In the case of a failed controller at one of the sites, a normal cluster failover occurs. Due to the operation of SyncMirror, there is also added protection from multidrive or complete shelf failures. When a storage controller fails in an active-active configuration, the partner detects the failure and automatically (if enabled) performs a takeover of the dataserving responsibilities from the failed controller. Part of this process relies on the surviving controller being able to read information from the disks on the failed controller. If this quorum of disks is not available, then automatic takeover won't be performed. In a MetroCluster configuration, manually executing a single command will allow a takeover to occur in spite of the lack of a quorum of disks. This "forced takeover" process breaks the mirrored relationships in order to bring the failed controller's volumes on line.

forcetakeover -d is very dangerous. Not only can it cause data corruption, if not used carefully, it can also lead to a situation where both the node and its partner are operational (split brain). As such, it should only be used as a means of last resort when the takeover and forcetakeover commands are unsuccessful in achieving a takeover. The operator must ensure that the partner node does not become operational at any time while a node is in a takeover mode initiated by the use of this command. In conjunction with RAID mirroring, it can allow recovery from a disaster when the two nodes in the HA pair are located at two distant sites.

Correct Answer: A

http://www.netapp.com/us/products/storage-systems/fas3200/fas3200-tech-specs.aspx

There is no easily remembered reason why its 500. Some people like to remember that there is one other question on the exam that requires you to remember an arbitrary number and the answer is also 500 (distance of a fiber interconnect at 2Gbps).

Correct Answer: A

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

fcp show adapter [ -v ] [ adapter ]

If no adapter name is given, information about all adapters are shown. This command displays information such as nodename/portname and link state about the adapter. If the -v flag is given, this command displays additional information

about the adapters.

Correct Answer: C

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

lun show [ -v | -m | -c ] [ all | mapped | offline | online | unmapped | staging | -g initiator_group | -n node | -l vol_name | lun_path ] Displays the status (lun_path, size, online/offline state, shared state) of the given LUN or class of LUNs. With the -v option supplied, additional information (comment string, serial number, LUN mapping, HA Pair Shared Volume Information) is also displayed. With the -m option supplied, information about lun_path to initiator_group mappings is displayed in a table format. With the -c option supplied, information about LUN cloning status is displayed.

A specific LUN can be indicated by supplying its lun_path. When an initiator_group is specified, status is reported for all LUNs that are mapped to the initiator group. When a node is specified, status is reported for all LUNs that are mapped to initiator groups which contain that node. When staging is specified, information about the temporary LUNs preserved in the staging area is reported. When vol_name is specified, status is reported for all the LUNs in that volume. Mapped LUNs are ones with at least one map definition. A LUN is online if it has not been explicitly made offline using the lun offline command.

Correct Answer: BE

Correct Answer: B

https://library.netapp.com/ecmdocs/ECMP1196991/html/GUID-06C70D3B-9A06-4D20-B140- EB147B941BDA.html

The data structures that are backed up and restored through SnapVault depend on the primary system. On systems running Data ONTAP, the qtree is the basic unit of SnapVault backup and restore. SnapVault backs up specified qtrees on the primary system to associated qtrees on the SnapVault secondary system. If necessary, data is restored from the secondary qtrees back to their associated primary qtrees. On open systems storage platforms, the directory is the basic unit of SnapVault backup. SnapVault backs up specified directories from the native system to specified qtrees in the SnapVault secondary system. If necessary SnapVault can restore an entire directory or a specified file to the open systems platform. The destination system uses a slightly more disk space and directories than the source system.