HP BL536A, User'S & Service Manual

Page: 98 / 165

Table 29 Performance impact of various disk connections
Recommendations Performance impact Connection type
For good performance, use a faster
connection with LTO-3, LTO-4, and
LTO-5 tape drives. Fibre: 1 Gb •
LTO-2: GOOD . When fully used, a 1 Gb fibre
connection can provide enough bandwidth for two
LTO-2 tape drives.
•
LTO-3, LTO-4, LTO-5: POOR . A 1 Gb fibre
connection is inadequate for an LTO-3, LTO-4, or
LTO-5 tape drive.
For good performance, use a faster
connection if you have multiple LTO-3 Fibre: 2 Gb •
LTO-2: GOOD . When fully used, a 2 Gb fibre
connection can provide enough bandwidth for 4
LTO-2 tape drives.
or LTO-4 tape drives, or an LTO-5 tape
drive.
•
LTO-3: GOOD . When fully used, a 2 Gb fibre
connection can provide enough bandwidth for an
LTO-3 tape drive.
•
LTO-4 HH: GOOD . When fully used, a 2 Gb fibre
connection can provide enough bandwidth for an
LTO-4 HH tape drive.
•
LTO-5: POOR . A 2 Gb fibre connection is
inadequate for an LTO-5 tape drive.
GOOD . When fully used, a 4 Gb fibre connection can
provide enough bandwidth for the following number
of tape drives:
Fibre: 4 Gb
•
LTO-2: 8
•
LTO-3 HH: 4
•
LTO-4 HH: 2
•
LTO-5: 1
GOOD . When fully used, an 8 Gb fibre connection
can provide enough bandwidth for the following
number of tape drives:
Fibre: 8 Gb
•
LTO-2: 16
•
LTO-3 HH: 6
•
LTO-4 HH: 3
•
LTO-5: 2
GOOD . When fully used, a 3 Gb high-performance
RAID array can support up to the following number of
tape drives:
SAS: 3 Gb
•
LTO-2: 10
•
LTO-3, LTO-4: 6
•
LTO-5: 3
GOOD . When fully used, an 6 Gb high-performance
RAID array can support up to the following number of
tape drives:
SAS: 6 Gb
•
LTO-2: 20
•
LTO-3, LTO-4: 12
•
LTO-5: 2
98 Troubleshooting