Netapp NS0-155 - Data ONTAP 7-Mode Administrator

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

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OSSV hosts listen for communications from NDMP manager applications on port 10000 by default.

SnapRestore overwrites all data in the file or volume. After you use SnapRestore to revert to a selected

Snapshot copy, you cannot undo the reversion.

http://hd.kvsconsulting.us/netappdoc/733docs/html/ontap/onlinebk/GUID-80FEDAF8-75FA-4E43-B683-58C1F66B61E2.html

IPSec is an encryption transport that can be used to secure any IP traffic including iSCSI.

All the network ports should be assigned correct port roles, and all the network ports should be in the same subnet.

https://library.netapp.com/ecm/ecm_download_file/ECMP1196907

In takeover mode, this network interface assumes the identity of the network interface on the partner

http://www.wafl.co.uk/tag/ifconfig/#sthash.3rsjaDZD.dpuf

For the partner interface configuration to be persistent across reboots, you must include the ifconfig command in the /etc/rc file

http://hd.kvsconsulting.us/netappdoc/801docs/html/ontap/nag/GUID-525FCF4E-109D-4E6F-9256-C6E56438CA9A.html

If a scheduled transfer fails (for example, due to network failure), SnapMirror automatically retries the transfer the next minute.

http://hd.kvsconsulting.us/netappdoc/733docs/html/ontap/onlinebk/GUID-511EAA86-069A-42E8-B62E-3168C7F0A83D.html

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

The following commands are available in the aggr suite:

If you use the -d disk1 [ disk2 ... ] argument, the node creates the aggregate with the specified spare disks disk1, disk2, and so on. You can specify a space-separated list of disk names. Two separate lists must be specified if the new aggregate is mirrored. In the case that the new aggregate is mirrored, the indicated disks must result in an equal number of disks on each new plex.

The disks in a plex are not permitted to span spare pools. This behavior can be overridden with the -f option.

The same option can also be used to force using disks that do not have matching rotational speed. The –f option has effect only when used with the -d option specifying disks to use.

The -m option can be used to specify that the new aggregate be mirrored (have two plexes) upon creation. If this option is given, then the indicated disks will be split across the two plexes. By default, the new aggregate will not be mirrored.

aggr mirror aggrname

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.

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.

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.