![Shared memory on Linux 64-bit EM64T and AMD64 [CR 381992]](arrow-right.gif){kind=icon}
To back up an IQ database to SCSI tape, you must set the block size of the device to accept variable length data transfer. Before performing any IQ backups, set the SCSI tape device's default block size. Log in as superuser and run the Linux shell command mt, as follows:
mt -f /dev/st0 defblksize 0
