Name

Displays the name of the disk storage. You can edit this field.

Description

Displays a description of the disk storage. You can edit this field.

State

Indicates the status of the disk storage device.

See Backup Exec server and storage device states.

Limit Backup Exec to read-only operations

Indicates whether or not you want Backup Exec to reclaim disk space from this disk-based storage, such as a USB drive. If you reattach a storage device to Backup Exec, and if any data has expired, then Backup Exec may attempt to reclaim the disk space. To prevent this situation, limit Backup Exec to read-only operations so that you can restore data from this storage device without overwriting the existing data.

If you enable this option, you can change the global setting that specifies the number of days that the storage device must be detached from Backup Exec before this option takes effect. However, when the specified number of days has passed for a detached disk storage device, Backup Exec automatically limits Backup Exec to read-only operations for this device.

The default value is No.

See Global settings for storage.

See About keeping backup sets.

See About restoring data from a reattached disk-based storage device.

Maximum file size

Displays the maximum file size on the disk storage. The data from the backup job is contained in a file on the disk.

The default value is 50 GB or the capacity of the disk storage.

Preallocate disk space incrementally up to the maximum file size

Creates the file when the backup job starts by preallocating space incrementally, according to the size of the increment that you set in Preallocation increment. As the job uses the disk space, more disk space is preallocated up to the maximum file size. When the job completes, the file size is then reduced to the amount of disk space that the job actually used.

For example, if you enable preallocation and set the preallocation increment to 4 GB, then 4 GB of disk space is preallocated when the job starts. After the job uses 4 GB, then Backup Exec allocates another 4 GB. Disk space continues to be preallocated by 4 GB until the job completes. If the job only uses 13 GB of the 16 GB that was allocated, then the file size is reduced to 13 GB.

The default value is Disabled.

Preallocation increment

Displays the amount of disk space by which to increase the file size. The file size is increased by this increment as the job requires disk space, up to the maximum file size.

The default value is 1 GB.

Auto detect block and buffer size

Indicates if Backup Exec automatically detects the preferred settings for the block and buffer size for the disk storage.

The default value is Enabled.

Block size

Displays the size of the blocks of data that are written to new media in this disk storage device if the option Auto detect block and buffer size is disabled. The default is the preferred block size.

Some storage devices provide better performance when larger block sizes are used. The preferred block size can range from 512 bytes to 64 kilobytes or larger. If you use a storage device that supports larger block sizes, you can change the block size. However, if the option to change the block size is unavailable, you must configure the device to use a larger size.

See the manufacturer's documentation for help in configuring the device.

Backup Exec does not ensure that the requested block size is supported by the storage device. If the requested block size is not supported, it defaults to its standard block size.

If the device does not support block size configuration, this option is unavailable.

Buffer size

Displays the amount of the data that is sent to the disk storage device on each read or write request if the option Auto detect block and buffer size is disabled. The buffer size must be an even multiple of the block size.

Depending on the amount of memory in your system, increasing this value may improve storage performance. Each type of storage device requires a different buffer size to achieve maximum throughput.

If the preferred block size is greater than 64 KB, the default buffer size is the same as the default block size. If the preferred block size is less than 64 KB, then the default buffer size is 64 KB.

Low disk space - Critical

Displays the critically low disk space threshold at which you want Backup Exec to send an alert. Backup Exec sends alerts when the amount of free disk space drops below the low disk space threshold, and again if it drops below the warning threshold. The amount of free disk space does not include the disk space that is reserved for non-Backup Exec operations.

You can change the value of the threshold, and you can change the amount of disk space to megabytes or gigabytes. This threshold must be less than the warning threshold.

The default value is 5%.

Low disk space - Warning

Displays the low disk space threshold at which you want Backup Exec to send an alert. If free disk space drops below the warning threshold to the critical threshold, another alert is sent. The amount of free disk space does not include the disk space that is reserved for non-Backup Exec operations.

You can change the value of the threshold, and you can change the amount of disk space to megabytes or gigabytes. This threshold must be less than the low disk space threshold.

The default value is 15%.

Low disk space

Displays the low disk space threshold at which you want Backup Exec to send an alert. If free disk space drops below this threshold to the amount specified in the warning threshold, another alert is sent. If free disk space drops below the warning threshold to the critical threshold, another alert is sent. The amount of disk space does not include the disk space that is reserved for non-Backup Exec operations.

You can change the value of the threshold, and you can change the amount of disk space to megabytes or gigabytes.

The default value is 25%.

Disk space to reserve for non-Backup Exec operations

Displays the amount of disk space to set aside for applications other than Backup Exec.

The default value is 10 MB.

Total capacity

Displays the size of the volume on which the disk storage is located.

Total backup storage

Displays the difference between Total capacity and the amount of disk space that is reserved for non-Backup Exec operations.

Used capacity

Displays the amount of space on the volume that is used by Backup Exec and other applications.

Amount of data written

Displays the total amount of backup data that is on the disk storage device.

Available capacity

Displays the difference between Total backup storage and Used capacity.

Compression ratio

Displays the ratio of Amount of data written to Used capacity. Compression ratio shows the overall effect that data compression and media flaws have on the amount of data that is stored.

Path

Displays the location of the disk storage device on the Backup Exec server.

Connection type

Indicates if the disk storage is located on a disk that is local to the Backup Exec server or if it is on a remote disk.

Backup Exec service restart needed

Indicates if the Backup Exec services must be restarted to apply any changes that are made to this device.

See Starting and stopping Backup Exec services.

Auto detect settings

Indicates if Backup Exec automatically detects the preferred settings for read and write buffers for the disk storage.

Buffered read

Enabling buffered reads may provide increased performance.

Buffered write

Concurrent write operations

Displays the number of concurrent write operations that you want to allow to this disk storage device.