File Storage System
The file storage system determines the organization of the files on the disks. Using
RAID controllers to spread files over multiple disks can improve performance because
some disks can be seeking while others are reading. Storing files on a single non-
RAID disk results in the slowest performance while storing files on a high-end disk
array results in the fastest performance.
Converting standalone disks to RAID can improve performance.
Connection from the Backup/Archive Host Server to a
Disk Array
The network connection between the host server and the disk array determines how
much data can be transferred from the disks to the host computer at a time. A
connection with insufficient bandwidth cannot provide enough data for the tape
drives to write at full speed. For optimum performance, the storage subsystem must
be able to provide data at the tape drive's maximum transfer rate. Backup systems
using a lower speed Ethernet network should use multiple network connections.
Backup/Archive Server
The backup server must have enough RAM and processor power to transfer the files
from the disk to the tape drive, in addition to running the backup or archive software,
and any other processes.
Check the RAM and processor usage during a backup operation. If they are operating
at capacity, adding RAM or processor capability can improve performance.
Backup/Archive Software and Method
Each backup method has its own impact on performance, depending on how well it
can keep data streaming to a tape drive. In most cases, native applications don't have
the features required to maximize performance for LTO tape drives. It is
recommended to use a full-featured backup or archive application with this library.
File-by-file backup or archive methods provide the best restore performance if you
only need to restore individual files. However, if the average file size is small, file-by-
file methods significantly reduce performance.
JANUARY 2023 222
SPECTRA STACK LIBRARY
USER GUIDE
CHAPTER 8 - LIBRARY TROUBLESHOOTING
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