Fujitsu Siemens Computers PRIMERGY SX30, Руководство по эксплуатации

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U41169-J-Z156-4-74
Dual Node SCSI Module Electronic Modules
Figure 26: Dual Node SCSI Module
The dual node SCSI module allows two server to access the SCSI drives of one
of the two available SCSI channels in the storage subsystem. This ensures
server redundancy or common data access (Low Cost Clustering). If the host
has a RAID controller with 2 channels, 2 times 7 hard disk drives are available
twice via the two dual node SCSI modules (see
chapter “Configurations” on
page 65 ).
The dual node SCSI module provides an Automatic Isolator Function if the
jumper X4 on
figure 26 is setting. This function (default setting) allows the
replacement of the corresponding module without switching OFF the storage
subsystem (see
table 11 ).
The dual node SCSI module has the following functions:
●
Forward the SCSI bus from the two possible SCSI input sockets (68 pin, ultra
high density) on the rear of the PRIMERGY SX30 storage subsystem to the
drive backplane.
●
Automatic isolation of the concerned SCSI input.
●
The SAF-TE controller on the module controls OLR functions and cabinet
diagnosis.
●
Should the drive be replaced, it generates an SCSI reset signal.
Jumper
Position
Function
1 - 2
(default)
The SCSI channels of the storage subsystem are automatically
isolated if the SCSI cable is unplugged or the corresponding
server is switched OFF.
Table 11: Jumper X4: Automatic Isolator Function
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