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Disk Libraries - Mount Path - Online Help

Table of Contents

Data on Media <Media ID>

Use this dialog box to view the contents of a media or a disk mount path.

Size on Media

Displays the size of all chunks of data stored in the media.

Total Backup Size

The approximate amount of valid data that is available on the media. This is the data that can be restored, but does not include data from failed/killed/disabled jobs. Valid data does not include aged data.

Required by Auxiliary Copy

Indicates whether the media has been copied to a secondary copy or not. (Auxiliary copy operation is performed to make copies of a media.)

Retain Data Until

The amount of time that the data on the media should be retained.

The following information is displayed for the each of the jobs that is associated with the data on the media.

  • Job ID

    The number allocated by the Job Manager for the data protection job.

  • Status

    Specifies the current status of the backup job.

    Status column helps you determine whether the backup job was completed, failed, killed, active if the job is in progress, or completed w/ one or more errors.

    Note: When the job status appears as completed w/one or more errors, check the Job Details of a job for an appropriate error message.

  • Client

    The client computer that performed the data protection operation.

  • iDataAgent

    The agent that performed the data protection operation.

  • Instance

    The level in the CommCell Browser that represents the database that was backed up.

  • Backup Set

    The backup set under which the operation was performed.

  • Subclient

    The subclient that performed the data protection operation.

  • Backup Level

    The type of backup that was conducted (full, incremental, differential, synthetic full, and so on).

  • Cycles/Sequences

    The cycle number or sequence number of the data protection operation.

  • Archive File Type

    The type of data in the archive file (Data or Log).

  • Copy Status

    Specifies the status of the backup job for an auxiliary copy operation.

    Copy status helps you to determine whether you need to run an auxiliary copy operation or not.

    For example:

    • If the status appears as Available, the data that was backed up during the backup job is copied to the secondary copies.
    • If the status appears as Partially Copied, the data of the job was partially copied on the secondary copies due to unexpected job failure.

      In this case, you need to run an Auxiliary Copy job to copy the data successfully.

    For more information on the description of the job status, see View the Jobs Associated with the Copy.

  • Backup Time

    The date and time when the data protection operation was completed.

  • Retain Until

    The time the data on the media should be retained.

  • Side

    The side of the media that was used by the data protection operation.

  • Archive File

    Applies only to Oracle, DB2, Informix, SAP for Oracle, SAP for MAXDB and Sybase iDataAgents. (Displayed as N/A for other agents.)

    The archive file name that was generated by the application.

  • Storage Policy/Copy

    The storage policy copy that is associated with the backup job.

  • Data Written

    The size of the data that is stored on the media for the corresponding archive file.

  • Size of Backup

    The size of the backup job (application data and index).

Mount Path Properties (General)

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

Properties

  • Mount Path

    The path where the data is written to and read from.

  • Free Space (MB)

    The remaining free space on the mount path.

    • Before you perform a data protection operation, always verify and ensure that sufficient disk space is available on the mount paths that are used by the operation. Data protection operations might be affected if the amount of space on the mount paths is insufficient.
    • The free space information is, by default, refreshed every 30 minutes. The refresh time can be changed in the Interval (Minutes) between disk space updates option in the Service Configuration tab of the Media Management Configuration dialog box in the Control Panel.

  • Size on Disk

    The total amount of backup data that is stored in the mount path.

  • Capacity (MB)

    The total amount of space on the mount path.

  • Application Size To Be Pruned

    The size of the data on the disk that is eligible for pruning during the data aging process.

  • Description

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

Use unbuffered I/O

Specifies that the MediaAgent will bypass the Microsoft Windows file system buffering by enabling unbuffered I/O. Select this option to increase the speed of operations that access the mount path. This option is only applicable for Windows MediaAgents and disks that are mounted directly (UNC paths are not supported).

Reserve Space for Silo Restore

Select this option if you want to use the mount path to receive Silo stores from Silo restore operations only. When this option is selected, this mount path is not used to store backup data.

Status

  • Status

    The status of the mount path.

  • Enable MountPath

    Select the Enable MountPath option to bring the mount path online and make it available for use. Clear this option to take the mount path offline. To disable the mount path for write operations and make the data available for read and prune operations, use the Disable mount path for new data in the Allocation Policy tab.

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

  • Offline Reason

    Indicates the offline reason, when the Status of the mount path is displayed as Offline.

Device

The following information is displayed for shared static mount paths.

  • Device Alias Name

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

  • Device Enabled

    When selected, the device is  enabled and available for use.

    When cleared the device is disabled and hence inaccessible to the MediaAgent.

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

Mount Path Properties (Allocation Policy)

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

Mount Path Allocation Policy

  • Maximum Allowed Writers

    When selected, maximum number of concurrent writers on the mount path will be established.

  • Allocate number of Writers

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

  • Disable mount path for new data

    Specifies that new write operations are not allowed on the mount path. However, read and prune operations can be performed.

Space Allocation

  • Reserve Space (MB)

    Specifies the total amount of free space that must be available at all times when the system writes data to the mount path. You can change this value to modify the amount of free space. The minimum allowed reserve space is 2048 MB.

  • Use until free space on mount path reaches Reserved Space

    Specifies that the entire mount path minus the reserve space is used to store valid data.

  • Do not consume more than n GB

    When this option is selected, the system writes data up to the amount that you specify. However, if that amount is greater than the reserve space allows, the system stops writing data when the reserve space is met, regardless of the amount that you specify for this option.

    For example, if you specify 8 GB as the amount for this option, but the space on the mount path is 10 GB and the reserve space is 4 GB, the system stops writing data to the mount path once 6 GB is reached.

Fragmentation

  • Minimize fragmentation by allocating write blocks of n MB

    This option allows the MediaAgent to preallocate a specified portion of the backup chunk before beginning a write operation. The chunk size should be determined based on the disk array and the file allocation unit size. The default size is 128 MB.

    Preallocating a specified chunk size before the write operation enables the Operating System to allocate contiguous disk clusters based on the requested chunk size, thus reducing disk fragmentation. This option is supported on Windows MediaAgent.

Pruning

  • Enable Pruning of Aged Data

    By default, pruning is enabled. To prevent pruning of aged data, clear the check box.

    Select MediaAgents for pruning aged data based on the associated copy's datapath

    By default, pruning request is sent to any MediaAgent that has access to the library, irrespective of whether the MediaAgent is part of the datapath or not.

    Select this check box to send the pruning request to only those MediaAgents associated with the datapaths in the Storage Policy copy.

Mount Path Properties (Deduplication DBs)

Use this dialog box to view the Deduplication Databases, Storage Policies, Storage Policy Copies that are associated with the selected mount paths.

  • DDB Name

    Displays the active or sealed deduplication database name that is associated with the mount path.

  • Storage Policy/Copy

    Displays the storage policy and storage policy copy name.

  • Sealed Time

    Displays the sealed time of the deduplication database.

Mount Path Properties (Sharing)

Use this dialog box to view the properties of the shared disk device that is associated with the mount path of a disk library.

Controllers

  • MediaAgent

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

  • Path

    Displays the location of the mount path.

  • Username

    Displays the user name that is used to access the mount path.

  • Access

    Displays the access type.

    • If the access type is Read, then that mount path is used only for read operations.
    • If the access type is Read/Write, then that mount path is used for both read and write operations.
  • Maximum Allowed Writers

    Specifies the maximum number of concurrent writers on the mount path.

  • Enabled

    Specifies that the mount path is available for use. Clear this option to take the mount path offline.

  • Accessible

    Specifies that the mount path is ready for accessible.

  • Transport Type

    Displays the supported transportation types through which the mount path is shared with all the MediaAgents.

  • Device Controller

    Displays the name of the MediaAgent that controls the library and the access type.

Share

Click this button to share mount paths on selected MediaAgents.

Share Mount Path

Use this dialog box to add a mount path to the selected disk library.

Transport Type

Select any supported transportation types through which the mount path is shared with all the MediaAgents.

Select

Select an available disk devices

MediaAgent Name

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

OS

Displays the operation system version of the MediaAgent.

Access

Specifies the access type.

  • If the access type is Read, then that mount path is used only for read operations.
  • If the access type is Read/Write, then that mount path is used for both read and write operations.

Local Path

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

  • Disk Device

    The local path of the disk storage in which the data is stored should be mounted locally to the MediaAgent. Click the Browse button to access the local path on 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 available.

The Network Path button is unavailable 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 where the data will be stored. Click the Browse button to access to the Browse for Mount Path dialog box, which allows you to establish a local path in the MediaAgent computer.

    When a mount path is created using UNC paths, verify and ensure that the user account that is used to access the mount path has sufficient permissions to read/write in the software install folder in the computer in which the MediaAgent associated with mount path is installed. The MediaAgent uses these folders to create the necessary log entries in the log files for jobs that are associated with the mount path.

Device Controller Details

Use this dialog box to view the details of the device controller associated with the mount path.

MediaAgent

Displays the name of the MediaAgent that controls the library and the access type.

Local Path

Select this option 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 Browse button to access to the Browse for Mount Path dialog box, which 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 available.

The Network Path button is unavailable 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 where the data will be stored. Click the Browse button to access to the Browse for Mount Path dialog box, which allows you to establish a local path in the MediaAgent computer.

Edit Maximum Allowed Writers

These options are available only when the Access type is selected as Read/Write.

  • Maximum Allowed Writers

    Specifies the maximum number of concurrent writers on the mount path.

  • Allocate number of Writers

    By default, maximum number of concurrent writers are allocated on the mount path. To limit the number of writers, type the number of concurrent writers that you want to allocate.

Preferred

Select this option if you want to mark the MediaAgent as the preferred MediaAgent for the data transfer operations. This option is selected by default for the default MediaAgent that on which the library is configured.

Mount Path Properties (Centera Info)

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

Properties

ClusterName

The Centera cluster name assigned to the Centera cluster when it was configured.

Space Used

The total amount of space used in the Centera disk library.

Total Space

The total amount of space available in the Centera disk library.

Access Paths

Host Name

The IP address or the hostname of the Centera disk library.

Port

The port number in the Centera cluster used by the system to access the Centera cluster.