Volume Properties

Heading

Description

Name

Name of the volume.

Type

Flexible or Traditional. Indicates whether the properties shown are for a flexible volume or a traditional volume.

Root Volume?

If this field is checked, the volume is a root volume. The current root volume cannot be taken offline.

FlexClone?

Flexible volumes only. If this field is checked, the volume is a FlexClone.

Containing Aggregate

Flexible volumes only. The aggregate that contains the volume. An aggregate can contain multiple flexible volumes, so different flexible volumes can have the same containing aggregate.

Status

Indicates whether the volume is online, offline, or restricted and the current state.

RAID Size

Traditional volumes only. Number of disks per RAID group. Any disks you add will be organized into RAID groups of this size.

Used Capacity

Amount of storage currently used.

Checksums

Traditional volumes only. Type of checksum currently being used (zoned or block).

Space Guarantee

Flexible volumes only. Volume, File, or None. Determines which entities are guaranteed to have successful writes when uncommitted space in an aggregate is exhausted.

% Used

Percentage of the total storage currently in use.

Language

Language that you want to use on this volume.

Total Capacity

Total storage for the aggregate or traditional volume.

Total Size

Flexible volumes only. The total size of the volume should include space for the snapshot reserve and file system overhead in addition to the usable space. By default, the snapshot reserve is 20% of the volume. The storage system reserves approximately 10% of the total disk space for overhead.

Number of Disks

Traditional volumes only. Number of disks currently assigned.

Number of Files

Number of files currently stored.

Max Directory Size

Maximum size you want to allow for a directory file. 

Max. Files

Maximum number of files that can be stored.

Double Parity?

Traditional volumes only. If this field is checked, the aggregate or traditional volume consists of RAID-DP (double parity) RAID groups.

SnapMirror?

If this field is checked, SnapMirror is currently being used to update the mirror. If not, SnapMirror has been disabled and the mirror has become a regular writable volume. You can only change this option from on to off; only Data ONTAP can change the setting of this option from off to on.

Snap Directory?

If this field is checked (default), the visible .snapshot directory that is normally present at client mount points is enabled. If not, the .snapshot directory is disabled and access to all other .snapshot directories in the volume is turned off.

Snap?

If this field is checked (default) automatic snapshots are enabled for this volume.

Resync Snap Time

Indicates the mirror resynchronization snapshot frequency in minutes. The default setting is 60 (minutes).

SVO Enable?

If this field is checked, Data ONTAP performs additional SnapValidator for Oracle (SVO) data integrity checking of all operations on the volume. If any problems are detected and if the SVO Reject Errors field is checked, the operation is rejected.

SVO Checksum?

If this field is checked, Data ONTAP performs additional SnapValidator for Oracle data integrity checksum calculations of all writes on the volume. If any problems are detected and if the SVO Reject Errors field is checked, the write operation is rejected.

Allow SVO RMAN?

If this field is checked, Data ONTAP performs SnapValidator for Oracle data integrity checks that are compatible with volumes that contain Oracle RMAN backup data. If any problems are detected and if the SVO Reject Errors field is checked, the write operation is rejected.

SVO Reject Errors?

If this field is checked, Data ONTAP returns an error to the host and logs the error if any of the SnapValidator for Oracle checks fail. If the field is not checked (default), Data ONTAP only logs the error.

Create Unicode?

Indicates whether all new directories on this volume will be created in Unicode format.

Convert Unicode?

Indicates whether all existing directories on this volume will be converted to Unicode format.

Minimal Read Ahead?

Indicates whether minimal read ahead is enabled. If minimal read ahead is not enabled, the volume is set to aggressive read ahead.

NV Fail?

If this option is on, the storage system performs additional status checking at boot time to verify that the NVRAM is in a valid state. This option is useful when storing database files. If the storage system finds any problems, database instances hang or shut down, and the storage system sends error messages to the console to alert administrators to check the state of the database. The default setting is off.

Fractional Reserve

Indicates what percentage of required reserve space is actually reserved to fully protect objects (LUNs, files) for overwrites. The value can vary from 0 to 100. By default, the fractional reserve is set to 100, which means that 100% of the required reserve space is reserved. However, you can reduce the fractional reserve in order to return the extra space to the available space for the volume, decreasing the total amount of space used.

Using a value of less than 100 leaves the protected objects in the volume vulnerable to out of space errors because less than 100% of the required reserved space is actually reserved. If reserved space becomes exhausted, disruptions occur on the hosts using the objects. If you reduce the fractional reserve below 100, be sure to monitor closely the space usage on the volume and take corrective action if the reserved space nears exhaustion.

Extent?

If this field is checked, extents are enabled in the volume, meaning that application writes are written in the volume as a write of a larger group of related data blocks called an extent. Using extents can help workloads that perform many small random writes followed by large sequential reads. However, using extents can increase the amount of disk operations performed on the storage system, so use extents only where the pattern of write and read operations indicates extents would be beneficial. The default setting is off, in which case extents are not used.

FS Size Fixed

If this field is checked, the file system on a SnapMirror destination volume remains the same size as the file system on the source volume. If necessary, the file system on the destination volume is truncated to match the size of the source volume file system. If the field is unchecked and the volume size is larger than the file system size, turning off this option will force the file system to grow to the size of the volume. The default setting is off.

Update Access time?

If this field is checked (default), the last-access time on an inode is updated whenever a file is read. If the field is not checked, Data ONTAP prevents the update. The default setting is on.

This option is useful for volumes with extremely high read traffic, since it prevents writes to the inode file for the volume from contending with reads from other files. Use this option when it is known in advance that the correct access time for inodes will not be needed for files on that volume. The default setting is off.

I2P?

If this field is checked (default), inode to parent pathname translations on the volume are enabled. If the field is not checked, the translations are disabled.

Ignore Inconsistent?

Traditional volumes only. If this field is checked, aggregate-level inconsistencies that would normally be considered serious enough to keep the associated volume offline are ignored during booting. The default setting is off.

SnapLock type

Compliance or Enterprise. Indicates the type of SnapLock restriction in effect, if any.

SnapLock minimum period?

The shortest amount of time the WORM file must be kept in a SnapLock volume.

SnapLock maximum period?

The largest amount of time the WORM file must be kept in a SnapLock volume.

SnapLock default period?

The retention period assigned to any WORM file on the SnapLock Compliance volume that was not explicitly assigned a retention period.