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25
Enclosure configuration
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JBOD - 24 drive configuration
The enclosure can also be set up as a single-bus JBOD (Just a Bunch of Drives)
configuration with two enclosures which will provide up to a 24 drive (12 per
channel) storage solution. In this configuration you can have a single host
system with a single HBA that has dual independent ports or a single host
system with two single port HBAs.
In this configuration both enclosures will be in single-bus mode. In each
enclosure, Channel 1 on the SAF-TE Disk I/O card will access all of the drives
1 through 12. A single-bus module must be installed in the Controller 1 slot.
This single-bus module connects Channel 1 and Channel 2 together to create
a single continuous SCSI bus.
Single-bus mode
In the preceding logical diagram, the drive slots are used to indicate which
drives are connected to which channel. They should not be confused with the
drive SCSI IDs. Those IDs are pre-determined by the SCSI Disk I/O card switch
settings.
1
Remove the SAF-TE Disk I/O card installed in both enclosures. Loosen the
two thumbscrews and pull the card from its slot location.
2
Locate the switches on each card and set them as described in the switch
setting diagram.
Drive I/O Connectors
Single Bus
Module
SEP
T= Location of internal termination
(autosense allows the physical connection
to disable termination)
T
T
SAF-TE Disk I/O
Drives 7 - 12
Drives 1 - 6
CH 1
CH 2
SEP