Netapp NS0-155 Data ONTAP 7-Mode Administrator Exam Practice Test

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

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

ifstat - display device-level statistics for network interfaces

netdiag - perform network diagnostics

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

The following commands are available in the lun suite:

Easy to use interactive mechanism for setting up initiator groups, LUNs, and mapping configuration.

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

fcp show initiator [ -v ] [ adapter ]

If no adapter name is given, information about all initiators connected to all adapters are shown.

The command displays the portname of initiators that are currently logged in with the Fibre Channel target adapters. If the portname is in an initiator group setup through the igroup command, then the group name is also displayed. Similarly, all aliases set with the fcp wwpn-alias command for the portname are displayed as well.

If the -v flag is given, the command displays the Fibre Channel host address and the nodename/portname of the initiators as well.

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.

A baseline (aka "full") backup is always required before valid incremental backups can be made.

pktt is part of the Data OnTap command set.

The output of pktt is not very human-readable, but it utilizes the tcpdump format which many traffic analyzers can read or import. Only two such analyzers have been offered here.

Wireshark is the successor of Etherreal, and available for several platforms. Netmon is a Microsoft project, available for Windows, soon to be deprecated by the Microsoft Message Analyzer project.

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.

http://www.netapp.com/us/system/pdf-reader.aspx?m=tr-3740.pdf &cc=us

SMB 2.0 support was included in Data OnTap 8.1.

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/ECMP1196991/html/GUID-75BD4540-A103-4E2B-8B0A-E6BBC0D3F43F.html

http://backdrift.org/man/netapp/man5/na_snapmirror.conf.5.html

Two multipath methods are supported:

The multiplexing mode causes snapmirror to use both paths at the same time. If one should fail, it will switch to use the remaining path only and use both again should the failing path be repaired.

Failover mode causes snapmirror to use the first path as the desired path and only use the second path should problems arise with the first path.

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

ifstat - display device-level statistics for network interfaces

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.

https://library.netapp.com/ecmdocs/ECMP1210206/html/GUID-A865DB95-9418-4ED2-A993-74F347F674A0.html

1. Validate that you can access the remote storage by entering the following command:

aggr status -r

Note: A (level-0 resync in progress) message indicates that a plex cannot be rejoined.

2. Turn on the power to the node at the disaster site. After the node at the disaster site boots up, it displays the following:

Waiting for giveback...(Press Ctrl-C to abort wait)

3. If the aggregates at the disaster site are online, take them offline by entering the following command for each aggregate that was split:

aggr offline disaster_aggr

disaster_aggr is the name of the aggregate at the disaster site.

Note: An error message appears if the aggregate is already offline.

4. Destroy every target plex that is in a level-0 resync state by entering the following command:

aggr destroy plex_name

5. Re-create the mirrored aggregates by entering the following command for each aggregate that was split:

aggr mirror aggr_name -v disaster_aggr

aggr_name is the aggregate on the surviving site’s node.

disaster_aggr is the aggregate on the disaster site’s node.

The aggr_name aggregate rejoins the disaster_aggr aggregate to reestablish the MetroCluster configuration.

6. Enter the following command at the partner node:

cf giveback

The node at the disaster site reboots.

You need to fulfill a set of prerequisites before you can use SnapMirror:

- You must purchase and enable the SnapMirror license. If the SnapMirror source and destination are on different systems, you must enable the SnapMirror license on each system.

- For SnapMirror volume replication, you must create a restricted volume to be used as the destination volume.

SnapMirror does not automatically create a volume. For information about how to create volumes, see the section on organizing data using volumes and qtrees in the Data ONTAP Storage Management Guide for 7-Mode.

- For SnapMirror volume replication, the destination system must use a version of Data ONTAP that is the same as or later than that of the SnapMirror source system.

https://library.netapp.com/ecmdocs/ECMP1196991/html/GUID-ED9C09EF-3F61-41FE-B8F1-36356C5FEC5F.html

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

snapvault update [ -k n ] [ -s snapname ] [ -w ] sec_ondary_qtree

Available on the secondary only. Immediately starts an update of the specified qtree on the secondary.

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

aggr mirror aggrname

[ -f ]

[ -n ]

[ -v victim_aggrname ]

[ -d disk1 [ disk2 ... ] ]

Turns an unmirrored aggregate into a mirrored aggregate by adding a plex to it. The plex is either newlyformed from disks chosen from a spare pool, or, if the -v option is specified, is taken from another existing unmirrored aggregate. Aggregate aggrname must currently be unmirrored. Use aggr create to make a new, mirrored aggregate from scratch.

Disks may be specified explicitly using -d in the same way as with the aggr create and aggr add commands.

The number of disks indicated must match the number present on the existing aggregate. The disks specified are not permitted to span disk pools. This behavior can be overridden with the -f option. The -f option, in combination with -d, can also be used to force using disks that have a rotational speed that does not match that of the majority of existing disks in the aggregate.

If disks are not specified explicitly, then disks are automatically selected to match those in the aggregate's existing plex.

The -v option can be used to join victim_aggrname back into aggrname to form a mirrored aggregate. The result is a mirrored aggregate named aggrname which is otherwise identical to aggrname before the operation.

Victim_aggrname is effectively destroyed. Victim_aggrname must have been previously mirrored with

aggrname, and then separated via the aggr split command. Victim_aggrname must be offline. Combined with the -v option, the -f option can be used to join aggrname and victim_aggrname without prompting the user.

The -n option can be used to display the command that the system will execute without actually making any changes. This is useful for displaying the automatically selected disks, for example.

Add a new backup user to the Backup Operators useradmin group list. Enter the following command:

useradmin user add backupuser -g "Backup Operators"

Generate an NDMP password for the new user. Enter the following command:

ndmpd password backupuser

The NDMP password is used to authenticate the NetBackup media server to the storage system. This password is required for setup on the NetBackup management station.

https://library.netapp.com/ecmdocs/ECMM1278284/html/onlinebk/5snapv37.htm

disk show [ -o | -s | -n | -v | -a]

Used to display information about the ownership of the disks. Available only on systems with software-based disk ownership. -o lists all disks owned by the filer with the name -s lists all disks owned by the filer with the serial number -n lists all unassigned disks. -v lists all disks. -a lists all assigned disks.

In an active volume SnapMirror relationship, the size of the source and destination file systems is identical.

However, the size of the destination volume can be larger than or equal to the size of the source volume. The size of the file systems must be identical to allow the source to be restored from the destination.

https://library.netapp.com/ecmdocs/ECMP1196991/html/GUID-DE5EE692-81CF-4569-A703-00B4E283CE99.html

The 'lun' in the path is irrelevant. The 0 at the end of each statement denotes the LUN ID.

LUN IDs must be unique per igroup.

The fstab file reflects the defined filesystem mount paths (including NFS mounts).

Always check network connectivity when a problem arises with a network service.

The exportfs command will display the active exports on the storage system.

The rules for the selection of disks or array LUNs, for using as mirrored aggregates, are as follows:

Disks or array LUNs selected for each plex must be in different pools.

The same number of disks or array LUNs must be in both the plexes.

Disks are selected first on the basis of equivalent bytes per sector (bps) size, then on the basis of the size of the disk.

If there is no equivalent-sized disk, Data ONTAP uses a larger-capacity disk, and limits the size to make it identically sized.

Data ONTAP names the plexes of the mirrored aggregate.

https://library.netapp.com/ecmdocs/ECMP1196991/html/GUID-F5F241AF-50C0-4FF3-8C01-96958581C4D9.html

The snapmirror.access option is the preferred method for controlling snapmirror access on a snapmirror source filer.

http://www.wafl.co.uk/snapmirrorallow/#sthash.4Cb8IqqN.dpuf

http://www.netapp.com/us/system/pdf-reader.aspx?m=tr-3786.pdf &cc=us

http://wafl.co.uk/ndmpcopy/

Because volume SnapMirror works at the block level, the source and destination must both be FlexVol volumes in the same aggregate type. The source and destination of a volume SnapMirror relationship must either both be FlexVol volumes in 32-bit aggregates or both be FlexVol volumes in 64-bit aggregates.

Therefore you cannot create a volume SnapMirror relationship from a FlexVol volume in a 32-bit aggregate to a FlexVol volume in a 64-bit aggregate or vice versa.

https://library.netapp.com/ecmdocs/ECMP1196995/html/GUID-577EDC41-FEA0-4987-8F04-55E736962FD1.html

Always unmount the LUN before you run the snap restore command on a volume containing the LUN or before you run a single file SnapRestore of the LUN. For a single file SnapRestore, you must also take the LUN offline.