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3: Using TPM
SAN Mapping
The Storage Area Network (SAN) Mapping feature, also known as Host-to-LUN
Mapping feature, restricts host access to logical drives. Each drive is granted only to a
single host or group of hosts, providing limited security control of data in an
environment where multiple hosts are connected to the controller.
This feature is available only on controllers with a fibre channel host interface running
on firmware version 6.0 or greater.
The SAN mapping feature is intended for use in configurations in which multiple host
computers attach to one or more controllers. This is also referred to as a SAN
configuration. The host computers are attached to the controller(s) through a fibre
channel arbitrated loop, FC hub, or FC switch. An example of fibre channel arbitrated
loop configuration is shown in Figure 3-45.
Figure 3-45
Storage Area Network
Without host to LUN mapping, each host computer (1 through 3) has complete access to
all four system drives. When a host system boots, operating systems such as Windows
NT attempt to mount all of these system drives. As a result, any data on the array can be
accessed by the Windows NT system. In some cases, Windows NT automatically writes
an identifying signature to these storage areas. This results in data corruption if another
one of the host systems has stored data there.
RAID Subsystem
With Dual Controllers
Host Computer 1
Host Computer 2
Host Computer 3
FC Hub or Switch
Logical
Drive 0
(RAID 3)
Logical
Drive 3
(RAID 5)
Logical
Drive 1
(RAID 1)
Logical
Drive 2
(RAID 0)
Summary of Contents for TP9100
Page 1: ...TPM Installation Instructions and User s Guide for TP9100 007 4382 002 ...
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Page 60: ...44 007 4382 002 3 Using TPM Figure 3 10 All Drive Packs Created 7 01 and Later Firmware ...
Page 65: ...Configuration Functions 007 4382 002 49 Figure 3 15 All LUNs Defined 6 14 Firmware ...
Page 87: ...Configuration Functions 007 4382 002 71 Figure 3 40 Initialization Progress 6 14 Firmware ...
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