Release Note для Spectra Logic spectra t120

Скачать
Страница из 138
Appendix D – Library and Media Specifications
121
Appendix D – Library and Media Specifications
Tape Drive Attachment Methods
The library has the following methods of attaching drives. The table below provides 
the methods as well as the physical interface needed for each method.
Tape Media and Drive Specifications
LTO-4 Media and Drives 
LTO-4 Fibre Channel drives will try to connect at 4Gb, but will auto-negotiate down to 
2Gb or 1Gb, depending on the interface used.
Method
Physical Interface
Fibre Channel QIP 
Optical LC type socket
E-QIP (Ethernet QIP) 
SFP Copper RJ-45 socket, Gigabit Ethernet
Fibre Channel Drive-attach 
Fixed optical LC type socket
SCSI Drive-attach
LVD SCSI HD68 female end connector
Parameter
Specification 
a
a. All specifications are subject to change without notice.
Tape Capacity
 b
 
b. Compression throughput and capacity depend on the type of data.
800 GB native (1600 GB compressed)
MTBF
250,000 hours at 100% duty cycle
Average File Access Time 
65 seconds
Uncorrectable Error Rate
1 x 10
-17
 bits
Sustained Transfer Rate
SCSI: 70 MB/sec. native (140 MB/sec. compressed); 
504 GB/hour
Fibre Channel: 120 MB/sec. native (240 MB/sec. compressed); 
864 GB/h
Burst Transfer Rate 
c
c. Actual transfer rate is limited by the performance of the HBA, interface controller, and the buffer control of the drive.
SCSI: 160 MB
2
/sec.
Fibre Channel: 400 MB
2
/sec.
Power Consumption
SCSI: 26 watts typical read/write
Idle--9.5w
Fibre Channel: 29.5 watts typical read/write
Idle - 12.5w