Acronis Backup for Windows Server Essentials - User Guide - Manual (Page 224)

224 Copyright © Acronis International GmbH, 2002-2014
Description: Specifies whether to check the hash values of data blocks that are sent to a
deduplicating vault
Possible values: Enabled or Disabled
Default value: Disabled
When sending a data block to a deduplicating vault, the agent also sends that block’s fingerprint
known as the hash value.
The Check Hash Value On Server Side parameter determines whether the storage node must
ensure that the hash value matches the data block. Such check puts an additional load on the
storage node.
Normally, such check is not necessary. You can set this parameter to Enabled to make the
deduplication process more secure.
If the check reveals a mismatch between the data block and its hash value, the backup operation
fails.
Vault Warnings and Limits
Specifies the amount of free space in a vault (both as an absolute value and as a percentage) below
which a warning or error is recorded in the log.
This parameter contains the following settings:
Vault Free Space Warning Limit
Description: Specifies the amount of free space in a managed vault, in megabytes, below
which a warning is recorded in the storage node's log.
Possible values: Any integer number between 0 and 2147483647
Default value: 200
A vault's free space is the amount of free space on the medium—such as a disk
volume—that stores the vault.
When the amount of free space in a vault is equal to the value in
Vault Free Space Warning Limit or less, a warning is recorded in the storage node's log,
indicating the vault in question. You can view storage node warnings in the Dashboard.
Vault Free Space Warning Percentage
Description: Specifies the amount of free space in a managed vault, as a percentage of its
total size, below which a warning is recorded in the storage node's log.
Possible values: Any integer number between 0 and 100
Default value: 10
The total size of a vault is the vault's free space plus the size of all archives that are
contained in the vault.
For example, suppose that two vaults, Vault A and Vault B, are both stored on a disk
volume. Suppose further that the size of the archives in Vault A is 20 GB and the size of
the archives in Vault B is 45 GB.
If the volume has 5 GB of free space, then the total size of Vault A is
20 GB + 5 GB = 25 GB, and that of Vault B is 45 GB + 5 GB = 50 GB, regardless of the size
of the volume.
The percentage of free space in a vault is the vault's free space divided by the vault's
total size. In the previous example, Vault A has 5 GB / 25 GB = 20% of free space, and
Vault B has 5 GB / 50 GB = 10% of free space.
When the percentage of free space in a vault is equal to the value in
Vault Free Space Warning Percentage or less, a warning is recorded in the storage