321 Studios GHDX2-2430S-24F4D manual Drive Mechanical Speed and Logical Drive Speed

Galaxy GHDX2-2430S/R-24F4D Installation and Hardware Reference Manual

Figure 4-1: Drive Mechanical Speed and Logical Drive Speed

There are other considerations. For example, a spare drive carries no data stripes and will not contribute to disk-level performance. Refer to the documentation that came with your hard drives for performance data.

•Follow all the Fibre Channel specifications when cabling. Pay attention to signal quality and avoid electronic noise from adjacent interfaces.

•The disk drives included in the same logical array should have the same capacity, but it is preferred that all disk drives within a chassis have the same capacity. Even disk drives of the same model name may carry different block numbers. One way to get around this issue is to tune down the “Maximum Drive Capacity” to a lower number. Please refer to your firmware operation manual for details.

•A spare drive should have a minimum capacity equivalent to the largest drive that it is expected to replace. If the capacity of the spare is smaller than the capacity of the drive it is expected to replace, then the controller will not proceed with the failed drive rebuild.

4-4 Subsystem Connection and Operation