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Disk Libraries - Online Help

Table of Contents

Add Disk Library/Add Mount Path

Use this dialog box to add a disk library to a selected MediaAgent.

Name

Specify a descriptive name for the disk library.

MediaAgent

Select the name of the MediaAgent that will control the library.

Local Path

Select this option if you want to specify a local path in the MediaAgent computer.

  • Disk Device

    The local path of the disk storage area where the data will be stored. Click the (...) button to access to the Browse for Mount Path dialog box that allows you to establish a local path in the MediaAgent computer.

Network Path

Select this option to specify a network path as the target share. The Connect As, Password and Verify Password fields are enabled.

The Network Path button is disabled for UNIX MediaAgents.

Connect As

The user name that will be used by the system to access the mount path.

Password

The password for the specified user name.

Verify Password

Confirmation of the password for the specified user name.

Folder

The network mount path of the disk storage area in which the data will be stored. Click the (...) button to access to the Browse for Mount Path dialog box that allows you to establish a local path in the MediaAgent computer.

Disk Library Maintenance (General)

Use this dialog box to select the mount paths where you will perform a fragmentation analysis.

Device Name

Name of the device.

Mount Path Name

Indicates the disk mount path name.

Size

Indicates the size of data in the disk mount path.

Date of Last fragmentation Analysis Run

Indicates the date when the last successful fragmentation analysis was performed for this mount path.

Last Analyzed Fragmentation %

Indicates in percent the disk fragmentation reported in the last successful maintenance job.

Analysis

Use this option to select the mount path for fragmentation analysis.

Disk Library Maintenance (Schedule type)

Use this dialog box to run or schedule a disk maintenance job.

Immediate

Select this option to run the job immediately.

Schedule

Select this option to create a schedule for this job. Click Configure to configure the schedule options.

Library Properties (General)

Use this dialog box to view or modify the properties of a disk library.

Library Name

The alias provided by the user for the library. The alias can be changed at any time without affecting the ability to restore data that might have already been backed up using the library.

MediaAgent

The name of the MediaAgent that controls the library.

Number of Mount Paths

The total number of mount paths that are defined for the library.

Status

The status of the library.

Disk Space

Displays the amount of space occupied on the disk. By default, the MediaAgent automatically updates the status of the disk space every 30 minutes. This is done based on the Interval (Minutes) between disk space updates parameter set in the Media Management Configuration dialog box.

Disks that require attention are indicated by a yellow icon. If the amount of space exceeds the maximum limit (that is, 95%), then the Space Status icon is highlighted in red. In this case, you must free up some space or add more space to the volume or modify the mount path.

Hide Library

Indicates whether the library should be visible in the CommCell Console. When selected, the library will not be visible when the Show hidden libraries option available in Service Configuration tab of Media Management Configuration dialog box is disabled.

Enable Library

Select the Enable Library option to bring the library online and make it available for use. Clear this option to take the library offline. When a library is offline, all the mount paths are inaccessible to the MediaAgent.

A library's online/offline status reflects its logical availability to the MediaAgent, not its physical availability. For example, a library can be enabled even if it is physically unavailable because of a hardware failure.

Mark Archive files as Read-Only

When this option is selected, the system creates archive files in the disk library with read-only permissions.

When this option is cleared, the system creates archive files in the disk library with all permissions.

Use this option to create read-only archive files on NetApp SnapLock volumes with access time set according to the retention days (backup or archiver retention days, whichever is higher) specified in the storage policy copy.

Timeouts (in Minutes)

The timeout parameter determines how long a job waits for a status response after an operation is requested. If the job does not receive a success or failure status within the timeout period, the job is terminated and a failure message is displayed. You can set the following timeout periods:

  • Mount

    The number of minutes used to mount the library for read/write operations.

  • Unmount

    The number of minutes used to unmount the library after a read/write operation.

Offline Reason

Indicates the offline reason when the Status of the library is displayed as Offline.

Description

Use this field to enter a description about the disk library. This description can include information about the disk library's content, any cautionary notes, and so on.

Library Properties (Mount Paths)

Use this dialog box to view or modify the mount path properties of a disk library.

Attributes

  • Automatically add data paths for new drivepools configured

     When enabled, the system automatically adds the alternate data paths for a shared library.

  • Disks within this library support Hardware Single Instancing

    When this option is selected, the underlying storage is able to do single instancing on files if the same file content is written multiple times. For example, Centera supports hardware based single instancing.

    Note: For underlying storage hardware like Data Domain which has parsing logic of SnapProtect's data format, there is no need to write data in individual small files. The data is written in a container format, where multiple files are combined together into a chunk.

    This option is not applicable for SnapProtect's Deduplication.

  • Prevent accidental deletion of data from mountpaths

    Select this option to prevent contents of mount paths (on Windows platforms) from being accidentally deleted. Mount paths created when this option is enabled are protected from accidental deletion.

Mount Path Usage

The following parameters are applicable when there are several mount paths in the disk library:

  • Fill and spill mount paths (Use new mount paths only as needed)

    Specifies that the system should completely consume (fill) the free space in a mount path before using another mount path.

  • Spill and fill mount paths (Load balance use of mount paths)

    Specifies that the system should round-robin (spill) between the available mount paths for each job.

    Prefer mount paths with more free space

    Specifies that while using the round-robin method to write the data, the system will use the mount path with the most free space available. The Free space in GB can be defined using the Free space difference in GB to consider preferring mount paths with more free space parameter.

  • Select mount path for MediaAgent according to the preferred setting

    Specifies the mount path that must be picked for write operations. (By default this option is cleared .)

    When selected, the mount path set as the 'preferred' mount path for the MediaAgent (selected in the data path), is picked for write operations.

    When cleared, the mount path is picked based either on the 'spill and fill' or the 'fill and spill' option set for the library.

    Note: Select this option to prevent write operations from occurring over a network.

Mount Path Allocation Policy

  • Maximum Allowed Writers

    When selected, maximum concurrent writers on the disk library will be established.

  • Allocate number of Writers

    By default, maximum concurrent writers are established on the disk library. To limit the number of writers, type the number of writers that you want to allocate.

Library Properties (Associations)

Use this dialog box to identify the storage policies and the storage policy copies accessing the library. The following information is displayed for each storage policy accessing the library:

  • Storage Policy

    The name of the storage policy accessing the library.

  • Copy Name

    The name of the storage policy copy accessing the library.

Library Properties (Security)

See Entity Properties (Security) for more information.

Library Properties (Disk Usage)

Use this dialog box to view the disk usage report.

Disk Space Utilization

Displays the total capacity that is available in the library

Disk Space Savings

Displays the disk space savings when you use deduplication

Average Daily Disk Consumption

Displays the amount of space consumed and freed within the library over a period of time

Library Properties (Space Management)

Use this dialog box to set threshold parameters:

Space Thresholds

Disk free space percentage

  • Low Watermark (%)

    Specifies the minimum amount of free space at which the low watermark warning should be generated. If the amount of free space, for all the combined mount paths, reaches or falls below the low watermark, the system adds an entry in the Event Viewer and sends an Insufficient Storage alert with status Below Low Media Threshold, if configured.

  • Warning Watermark (%)

    Specifies the amount of free space on the disk at which a warning must be generated. If the amount of free space falls below the specified amount, then the system generates an event message and generates Insufficient Storage alert with status Below Warning Threshold, if configured.

  • Notify when library will run out of space in n days

      Specifies the number of days in advance to trigger notification for low disk space in the library. See Modify the Low Watermark for more information.

Thresholds for Managed Disk Space

The following parameters for free disk space is considered for data aging when the Enable Managed Disk Space for disk data option is enabled in the Retention tab of the Copy Properties dialog box.

The following parameters can be established:

  • Start aging when data occupied on disk is n %

    Specifies the disk capacity in percentage that must be reached before data is aged when the Data Aging operation is run. If necessary, use the space to modify the threshold. Note that any predetermined basic or extended retention rules must be met before the data is aged.

  • Stop aging when data occupied on disk is n %

    Specifies the disk capacity in percentage, when reached, data is not aged during a Data Aging operation. If necessary, use the space to modify the threshold.

Select MediaAgents

Use this dialog box to select MediaAgents for which the libraries and drives must be displayed or detected.

Available MediaAgents

Lists the MediaAgents available in the CommCell.

Selected MediaAgents

Lists the MediaAgents selected for detection.

The following buttons are available:

  • Add

    Allows you to add a MediaAgent that you want to use to detect the libraries and drives. To do this, select a MediaAgent from the Available MediaAgents list, and then click Add.

  • Remove

    Allows you to remove a MediaAgent  that you do not want to use to detect the libraries and drives. To do this, select a MediaAgent from the Selected MediaAgents list, and the click Remove.

  • Add All

    Click Add All to include all of the MediaAgents the Available MediaAgents list.

  • Remove All

    Click Remove All to remove all of the MediaAgents from the Selected MediaAgents list.

Disk Device Properties

Use this dialog box to view or modify the properties of a disk device.

Device Name

Initially a unique name generated by the system for the device. Enter a descriptive name for the device.

ID Type

The type of physical address used to uniquely identify this volume.

ID

The value of the physical identifier (for example, WWN)

DRU Host

The name of the DRU host. Use the list to select the appropriate name. The list contains the names of DRU hosts that were added from the DRU Host List dialog box.

LUN

Some physical disk devices are divided into sub devices called logical units. Each logical unit is treated as an independent disk device, although several logical units might share the same ID Type/ID pair. Together, the ID Type/ID/LUN represent the unique identity of the physical volume.

LB Offset

The first Logical Block on the disk that is assigned to the volume.

Block Count

The total amount of blocks on the selected partition or volume.

Block Size

The size measured in bytes of each block on the partition or volume.

Library Properties

Use this dialog box to view or modify the properties of a library. All of the options described in this here might not be available. Only the options that appear in the dialog box are applicable to the selected library.

Library Name

Displays a unique name that was generated by the system for the library when the library was detected.

Alias

A descriptive name for the library. The alias appears in the CommCell Browser for the library.

If necessary, the alias can be modified to provide a descriptive name for the library.

MediaAgent

The name of the MediaAgent that controls this library. This information is displayed for stand-alone drives only.

Manufacturer

The library manufacturer.

Model

The library model.

Firmware

The software version used in the library.

Description

Displays the description that was recorded when the library was configured. This information is displayed for IP libraries only.

Serial Number

The serial number of the library. (Not applicable for IP libraries.)

WWN

The World Wide Name by which the library is identified within a SAN. (Not applicable for IP libraries.)

SCSI Address

Identifies the SCSI ID using the following: port, bus, target, and Logical Unit Number (LUN). This information is displayed for stand-alone drives only.

Base Address

Part of the library's internal addressing scheme. (Not applicable for IP libraries.)

Volume Range

For ACSLS libraries, the ascending barcode ranges for volumes that are available in the specified work pool. If necessary, you can add additional volume ranges for the library. Use a dash to specify range and commas to delimit ranges. For example: 000065-000165,000167,000170-000199.

Not applicable for other IP libraries.

Work Pool Number

For ACSLS libraries, this is the work pool number that is associated with the scratch pool.

For IBM 3494 libraries, this is the work pool number that is associated with a work pool that was created manually.

Drive Slot Count

Total number of drive slots.

Drive Count

Total number of drives that were detected or included in the library.

Configured Drive Count

Total number of configured drives in the library.

Door Check (Sec)

This interval, expressed in seconds, determines how frequently the system checks to see whether the library door is open. If the door is open during a check, the system conducts a full inventory of the library after the door is closed. This way, if media were manually inserted or removed from the library while the door was open, the inventory is updated. This value is editable only before the library is configured.

If you open and close the door in the interval between checks, the system does not detect the opening and closing, and does not update the library's inventory.

Barcode Reader Installed

Indicates whether the library is configured as a sighted (library with a bar code reader) or blind (library with no bar code reader) library.

When selected, the library is configured as a sighted library.

When cleared, the library is configured as a blind library.

Is a Virtual Tape Library

When selected, indicates that the library is a virtual tape library. For the library type, select NetApp NearStore for NetApp Near Store libraries and Generic for others.

Automatically create storage policy for new Datapaths

Indicates whether the system must create new storage policies automatically during subsequent library configuration. Applicable only for shared libraries.

Auto Configure DDS Drive Pool

Indicates whether the system must automatically configure the library with a Dynamic Drive Sharing (DDS) configuration if a new data path is found. Applicable only for shared libraries.

Auto Configure Failover Library Controller

Indicates whether the system must automatically create the failover library controllers for shared libraries. Applicable only for shared libraries.

List ACSLS Clean Media

For ACSLS library, when this option is selected, cleaning cartridges that are available for the library's own cleaning function appear in the Media in Library pool in the CommCell Console. When you select this option, the library must be reset  for the cleaning media to appear in the CommCell Console.

In addition, this option should be selected in only one of the configured libraries. For example, you have configured each scratch pool (from one physical library ) as a CommCell library. Select this option in any one of the configured libraries.

Use Drive ID for Drive Replacement

For ACSLS library, when this option is selected, the MediaAgent automatically detects new drives if they were swapped or replaced. Select this option in ACSLS Server / libraries that support a serial number for each drive ID. Type the following command in the ACSLS Console to show the serial number for all drives:

display drive * -f serial_num

The system displays both the drive ID and the serial number if that ability is supported. If it is not supported, only the drive ID is displayed.

If the library is associated with a stand-alone drive, Manufacturer is displayed as StandAln, Model as Drive, Firmware as Library and the SCSI Address is the address of the drive. Base Address is not applicable for stand-alone drives.