Dell PowerVault 132T LTO Performance Considerations for Tape Drives and Librar - Page 16

Tape Library With up to Six Tape Drives

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www.dell.com | support.dell.com Recommended Cabling Configurations SCSI Cabling to the Host Tape Library With up to Six Tape Drives When the tape library is SCSI-attached to a host, ensure that no more than two drives are on a single bus. Additional SCSI controllers are required for libraries with five or six tape drives to ensure that no SCSI bus becomes a barrier to maximizing throughput. Figure 1-8. SCSI Cabling for Library With up to Six Tape Drives library-to-host SCSI cable terminator library-to-host SCSI cable terminator drive-to-library controller SCSI cable Tape Library With up to Two Tape Drives The drives in a fully configured two-drive tape library can be cabled to a host on the same SCSI bus without encountering significant limitations to backup performance. The backup rates for two drives on a single SCSI bus will match the backup rates for two drives on separate buses. However, customers who enable the verify feature in backup applications may wish to improve the verify performance by splitting two drives onto two SCSI buses. By doing so, verify performance may improve by up to 25 percent. 16 Performance Considerations for Tape Drives and Libraries

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16
Performance Considerations for Tape Drives and Libraries
www.dell.com | support.dell.com
Recommended Cabling Configurations
SCSI Cabling to the Host
Tape Library With up to Six Tape Drives
When the tape library is SCSI-attached to a host, ensure that no more than two drives are on a
single bus. Additional SCSI controllers are required for libraries with five or six tape drives to
ensure that no SCSI bus becomes a barrier to maximizing throughput.
Figure 1-8.
SCSI Cabling for Library With up to Six Tape Drives
Tape Library With up to Two Tape Drives
The drives in a fully configured two-drive tape library can be cabled to a host on the same SCSI bus
without encountering significant limitations to backup performance. The backup rates for two
drives on a single SCSI bus will match the backup rates for two drives on separate buses. However,
customers who enable the verify feature in backup applications may wish to improve the verify
performance by splitting two drives onto two SCSI buses. By doing so, verify performance may
improve by up to 25 percent.
library-to-host
SCSI cable
library-to-host
SCSI cable
drive-to-library
controller SCSI
cable
terminator
terminator