Product specifications

Terminal Operation
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• At least one controller’s ID has to be present on each channel
bus.
4.13.4 Data Rate (Channel Bus)
Figure 4 - 66: Data Rate Screen
This option is available in the configuration menu of Fibre host channel
and the drive channel configuration menus of Fibre- or SATA-based
subsystems. Default is “AUTO” and should work fine with most disk
drives. Changing this setting is not recommended unless some particular
bus signal issues occur.
Most SATA/ATA-based systems connect only one drive per SATA/ATA
channel (4 for multi-lane with SATA II) to help avoid a single drive failure
from affecting other drives. The maximum mechanical performance of
today’s drives can reach around 30MBps (sustained read) which is still far
below the bandwidth of a drive channel bus. Setting the SATA bus speed
to a lower value can get around some problems, but will not become a
bottleneck to system performance.
Note that the SATA/ATA speed is the maximum transfer rate of the
SATA/ATA bus in that mode. It does not mean the drive can actually carry
out that amount of sustained read/write performance. For the performance
of each drive model, please refer to the documentation provided by drive
manufacturer.