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DuraStor 412R/6320SS/7320SS Installation and User's Guide
At power-on, the SEPs read the SCSI switch settings and configure
the system for the appropriate addresses. The SEPs execute
firmware from the onboard flash memory and perform a POST.
The firmware is flash upgradeable using the SAF-TE RS-232 service
port located below the I/O card slots at the rear of the storage
subsystem. The firmware also contains the necessary functions for
storage subsystem management.
The SAF-TE disk I/O card has two 68-pin VHD/CI SCSI
connectors that provide the connectivity from the primary storage
subsystem to the disk drives in the daisy-chained DuraStor storage
subsystems. The connectors are labeled Channel 1 and Channel 2.
The following bus modes are possible:
In JBOD dual-bus mode, the Channel 1 connector provides SCSI
I
bus access to the disk drives in slots 7 through 12, and the
Channel 2 connector provides access to the drives in slots 1
through 6. Termination is automatic and provided internally on
the drive mid-plane circuit board.
In JBOD single-bus mode, the Channel 1 connector provides
I
SCSI bus access to all the disk drive slots, 1 through 12, and the
Channel 2 connector provides the automatic SCSI bus
termination.
In a daisy-chain configuration, you will be required to make
I
changes to the jumper settings in the last enclosure's SAF-TE
disk I/O card in that daisy-chain.
In each of the supported configurations, all DuraStor 412R
enclosures appear at the end of the daisy chains. Therefore, all
daisy-chained DuraStor 412R enclosures must have jumpers
installed on JP7 and JP8.
Note: Only the channel for each connection requires a jumper.
However, for best convenience in light of the fact that the
SAF-TE Disk I/O card is not hot swappable, set both jumpers
at the same time.
These jumpers allow the automatic termination to function
properly. For each channel used, install a jumper on JP8 for
Channel 1 and JP7 for Channel 2. By default, the jumper is left
hanging on one pin, or unjumpered.
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