HP StorageWorks MSL2024 User Manual

RecommendationsPerformance impactConnection type
Upgrade to Ultra 320 for parallel
SCSI disk drives when using an
LTO-3 or LTO-4 tape drive,
especially if your data is greater
than 2:1 compressible.
• LTO-2: GOOD. When fully used and assuming
that the connection to the disks does not force
the speed to a lower parallel SCSI type, an Ultra
160 connection can provide enough bandwidth
for two LTO-2 tape drives.
• LTO-3: MARGINAL. An Ultra 160 connection is
barely adequate for an LTO-3 tape drive. The
bus would be saturated when providing 2:1
compressible data to an LTO-3 tape drive.
• LTO-4 HH: MARGINAL. An Ultra 160 connec-
tion is barely adequate for an LTO-4 HH tape
drive. The bus would be saturated when
providing 2:1 compressible data to an LTO-4
HH tape drive.
• LTO-4 FH: POOR. An Ultra 160 connection is
barely adequate for streaming anLTO-4 FH tape
drive with uncompressible data and will not
sustain maximum data rates with compressible
data.
• LTO-5: POOR. An Ultra 160 connection is inad-
equate for an LTO-5 tape drive.
Parallel SCSI: Ultra
160
Upgrade to Ultra 320 for parallel
SCSI disk drives when using an
LTO-3 or LTO-4 tape drive.
• LTO-2: MARGINAL. When fully used and assum-
ing that the connection to the disks does not
force the speed to a lower parallel SCSI type,
an Ultra 2 (80) connection barely provides
enough bandwidth for an LTO-2 tape drive.
• LTO-3, LTO-4, LTO-5: POOR. An Ultra 2(80)
connection is inadequate for an LTO-3, LTO-4,
or LTO-5 tape drive.
Parallel SCSI: Ultra
2 (80)
Upgrade to a faster transport
medium, such as Ultra 320 SCSI.
POOR. Ultra Wide and Fast Wide are inadequate
transport mechanism for LTO tape drives.
Parallel SCSI: Ultra
Wide, Fast Wide
GOOD. When fully used, a 10 Gigabit Ethernet
connection can provide enough bandwidth for the
following number of tape drives:
• LTO-2: 14
• LTO-3 HH: 5
• LTO-3 FH: 4
• LTO-4 HH: 4
• LTO-4 FH: 2
• LTO-5: 2
Ethernet: 10 Gigabit
Upgrade to Fibre Channel or 10
Gig Ethernet if using LTO-3,
LTO-4, or LTO-5 tape drives.
• LTO-2: MARGINAL. A 1 Gigabit Ethernet con-
nection barely provides enough bandwidth for
an LTO-2 tape drive when two concurrent
streams are used. The drawback of using con-
currency is that restore operations take longer.
• LTO-3, LTO-4, LTO-5: POOR. A 1 Gigabit Ether-
net connection is inadequate for an LTO-3, LTO-
4, or LTO-5 tape drive.
Ethernet: 1 Gigabit
Troubleshooting170

HP StorageWorks MSL2024 Specifications

General

Number of Slots	24
Number of Drives	1 or 2
Tape Technology	LTO Ultrium
Drive Bays	1 or 2
Interface	SCSI, SAS
Drive Type	LTO-3, LTO-4
Supported Drives	LTO-3, LTO-4
Operating System Support	Windows, Linux, HP-UX, Solaris, AIX
Dimensions	8.9 x 48.0 x 44.8 cm