Dell 120T Laptop User Manual


 
2-6 Dell PowerVault Systems Storage Area Network (SAN) Installation and Troubleshooting Guide
DELL CONFIDENTIAL - Preliminary 3/16/00
(Rev. 11/3/98) FILE LOCATION:
S:\SYSTEMS\San\San2_0\I&T_Guide\English\91WYJ_A00\91WYJc20.fm
the switch. This is also the reason each of the servers must have two HBAs installed.
Each HBA connects to one switch and respectively to one SP. Due to the failover capa-
bilities provided by the Dell OpenManage Application Transparent Failover (ATF)
software, configuring this way also eliminates all cables, switches, gigabit interface
controllers (GBICs), and HBAs as a single point of failure. Therefore, any one of those
hardware components can fail and connectivity is maintained with no loss of data.
The switch also provides the ability to add and remove devices while the SAN is
operational.
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The PowerVault 650F DPE is a Fibre Channel-attached, external redundant array of
independent disks (RAID) subsystem. It ships with one or two high-performance
RAID controllers and up to 10 hard-disk drives. The configuration is expandable to 120
hard-disk drives with additional PowerVault 630F disk-array enclosures (DAEs). Stan-
dard features include redundant power supplies, fans, and link controller cards (LCCs).
The PowerVault 651F is a standalone deskside enclosure. The enclosure contains a
PowerVault 650F DPE and a PowerVault 630F DAE, which provides a maximum of 20
hard-disk drives.
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The PowerVault 35F Fibre Channel multiport bridge is a small computer system inter-
face (SCSI)-to-Fibre Channel protocol converter that enables SCSI-based high-voltage
differential (HVD) tape libraries/autoloaders to attach to the Fibre Channel fabric and to
be shared between multiple servers on the SAN.
The multiport bridge converts Fibre Channel signals from the switch into SCSI signals
that the 120T digital linear tape (DLT) Autoloader or 130T DLT Library can use. It also
presents the 120T DLT Autoloader or 130T DLT Library as a sharable device.
The main benefit of Fibre Channel backup is that the tape library becomes a central
resource that can be shared among all servers on the SAN and data throughput is sig-
nificantly faster than in a network backup. Dell SAN specific tape backup software is
required to permit this sharing ability and to control access to the commonly available
tape drives in this environment.
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The PowerVault 130T DLT
x
Library is a compact, tape-based, HVD SCSI-2 storage
subsystem for data backup and restore for one or more servers and disk storage
subsystems. Referred to as a DLT tape library, the PowerVault 130T features high-
capacity, high throughput, data compression, automated backup capability, and
reliable, accurate data restore functions.
The PowerVault 120T DLT
x
Autoloader is a fully automated, seven-tape, random
access tape autoloader designed to be a more effective network backup solution than
manually operated stand-alone tape drives.