Operation Manual

If the value is 0 or if the parameter is absent, the block size is determined as follows:

 In Windows, the value is taken from the tape device driver.

 In Linux, the value is 64 KB.

Registry key (on a machine running Windows):

HKEY_LOCAL_MACHINE\SOFTWARE\Acronis\BackupAndRecovery\TapeLocation\DefaultBlockSize

Line in /etc/Acronis/BackupAndRecovery.config (on a machine running Linux):

"value"

</value>

If the specified value is not accepted by the tape drive, the software divides it by two until the

applicable value is reached or until the value reaches 32 bytes. If the applicable value is not found,

the software multiplies the specified value by two until the applicable value is reached or until the

value reaches 1 MB. If no value is accepted by the drive, the backup will fail.

WriteCacheSize

This is the buffer size (in bytes) used when writing to tapes.

Possible values: 0, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072,

262144, 524288, 1048576, but not less than the DefaultBlockSize parameter value.

If the value is 0 or if the parameter is absent, the buffer size is 1 MB. If the operating system does not

support this value, the software divides it by two until the applicable value is found or until the

DefaultBlockSize parameter value is reached. If the value supported by the operating system is not

found, the backup fails.

Registry key (on a machine running Windows):

HKEY_LOCAL_MACHINE\SOFTWARE\Acronis\BackupAndRecovery\TapeLocation\WriteCacheSize

Line in /etc/Acronis/BackupAndRecovery.config (on a machine running Linux):

"value"

</value>

If you specify a non-zero value that is not supported by the operating system, the backup will fail.

7.4.2.5 Peculiarities of backing up to tapes

Backup options

You can configure the Tape management (p. 121) backup options to determine:

 When to eject a tape.

 Whether to use a free tape for each full, incremental or differential backup.

 Whether to overwrite a tape when creating a full backup (for stand-alone tape drives only).

 Whether to use a separate tape set for backing up each machine.

 Whether to enable file recovery from disk-level backups stored on tapes.

Backup schemes

Simple scheme