NS0-155 Data ONTAP 7-Mode Administrator Questions and Answers

http://www.netapp.com/us/system/pdf-reader.aspx?m=ds-3177-0512.pdf &cc=us

http://www.netapp.com/us/products/platform-os/flashpool.aspx

Flash Pool utilizes SSDs to enhance performance of disk aggregates.

Flash Cache is a controller-attached PCIe intelligent caching solution.

Flash Accel is a host-attached caching solution.

Flash Disk and Flash IO are ambiguous terms.

https://communities.netapp.com/docs/DOC-1059

Performance and Statistics Collector (perfstat) is a data collection tool with several key properties:

• Captures all needed performance information with one command
• Captures information from host(s) and filer(s)
• Captures all information simultaneously for cross correlation
• Operates on all host platforms and all filer platforms
• All captured data is recorded in a single plain-text output file

Perfstat comes in exactly two flavors:

• Unix/Linux version (perfstat.sh)
• Windows version (perfstat.exe)

Supported platforms:

• Unix: AIX, HP-UX, Linux, OSF1, Solaris, FreeBSD
• Windows: 2000/XP/2003

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

wafl.default_security_style

Specifies the default security style assigned to a new volume. All qtrees created on the volume get this as their security style. Legal values for this option are `unix', `ntfs', or `mixed'. The default value for this option is `unix', unless the node is an NTFS-only node, in which case the default is `ntfs'.

Note: if cifs setup is run after setting wafl.default_security_style, the filer will become an NTFS security style filer.

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

Using the -p option may reduce the extra storage requirements in a flexible volume when reallocation is run on a volume with snapshots. It may also reduce the amount of data that needs to be transmitted by SnapMirror on its next update after reallocation is performed on a SnapMirror source volume.

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.

Disks must be assigned to an aggregate to be used as raid group members or spares. Unassigned disks are displayed as "not owned".

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

In OnTap 8.0, when UNIX security style is selected, only UNIX security objects can be used. The correct answer is GID, UID and UNIX permissions.

Basic UNIX permissions are organized into three classes: user, group, and others.

UNIX operating systems identify users with a numerical value: a user identifier, also known as a UID or User ID. Each user is a member of a group of the same name as the user. Like UIDs, groups (GIDs) are also specified using a numerical value.

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

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.

lun map [ -f ] lun_path initiator_group [ lun_id ]

Maps a LUN to all the initiators in the supplied group

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.

Section: Data Protection

NetApp also recommends that if deduplication is used on the source volume, then it should also be used on the destination volume. However, you are not restricted using deduplication on the source volume only.

The deduplication schedule is not tied to the qtree SnapMirror update. In other words, the deduplication process does not automatically start at the completion of the qtree SnapMirror transfer.

The fingerprint database and the change log files that are used in the deduplication process are located outside of the volume in the aggregate and are therefore not captured in Snapshot copies

http://www.netapp.com/us/media/tr-3505.pdf

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

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/ECMP1196889/html/GUID-8ACE3CAB-D338-4AFC-A530-0D0FEC3B9F94.html

The snaplock command manages compliance related functionality on the system. A volume created using the vol command (see na_vol(1)) is a snaplock volume when either the enterprise or compliance option is chosen.

Enterprise and compliance SnapLock volumes allow different levels of security assurance.

https://library.netapp.com/ecmdocs/ECMP1196889/html/GUID-D4533C47-441D-41AB-A8A2-272A2BFC431C.html

SnapLock operates fundamentally at the file level.

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/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.

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.

Aggregates are never converted as part of an upgrade. An upgrade will not touch your data!

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

aggr split aggrname/plexname new_aggrname

Removes plexname from a mirrored aggregate and creates a new unmirrored aggregate named

new_aggrname that contains the plex. The original mirrored aggregate becomes unmirrored. The plex to be split from the original aggregate must be functional (not partial), but it could be inactive, resyncing, or out-ofdate.

Aggr split can therefore be used to gain access to a plex that is not up to date with respect to its partner

plex, if its partner plex is currently failed.

If the aggregate in which plexname resides is embedded in a traditional volume, aggr split behaves identically to vol split. The new aggregate is embedded in a new traditional volume of the same name.

The aggregate in which plexname resides must contain exactly one flexible volume, aggr split will by default rename the flexible volume image in the split-off plex to be the same as the new aggregate.

If the original aggregate is restricted at the time of the split, the resulting aggregate will also be restricted. If the restricted aggregate is hosting flexible volumes, they are not renamed at the time of the split. Flexible volumes will be renamed later, when the name conflict is detected while bringing an aggregate online. Flexible volumes in the aggregate that is brought online first keep their names. That aggregate can be either the original aggregate, or the aggregate resulting from the split. When the other aggregate is brought online later, flexible volumes in that aggregate will be renamed.

If the plex of an aggregate embedded within a traditional volume is offline at the time of the split, the resulting aggregate will be offline. When splitting a plex from an aggregate that hosts flexible volumes, if that plex is offline, but the aggregate is online, the resulting aggregate will come online, and its flexible volumes will be renamed. It is not allowed to split a plex from an offline aggregate.

A split mirror can be joined back together via the -v option to aggr mirror.

After you revert a volume to a selected Snapshot copy, you lose all the Snapshot copies that were taken after the selected Snapshot copy.

https://library.netapp.com/ecmdocs/ECMP1196991/html/GUID-80FEDAF8-75FA-4E43-B683-58C1F66B61E2.html