On Tue, Dec 22, 2009 at 9:49 AM, Aria Bamdad <a...@bsc.gwu.edu> wrote:
> The question below was asked back in May with no real answer. I recently > ran into a section in an IBM z10-BC systems assurance document (SA08-006) > that says: > > 3.5.1 Important Power Selection Considerations > As you select features for your z10 BC server, be aware of the following > when > choosing server power: > . If you choose single phase power, you can have a maximum of two I/O > drawers. > . If you choose single phase power, you will have unbalanced power. > . If you choose three phase power, you may have either balanced or > unbalanced power, depending on server configuration. > . If you choose three phase power, you can guarantee balanced power by > selecting FC3002, Balanced Power Plan Ahead. This feature adds two more > Bulk Power Regulators to each side of the power supplies, assuring adequate > and balanced power for all possible configurations. > > So, something like the above may apply to a z890 as the original question > referenced. > What is "unbalanced" power? The Senate without the House? Congress without the Supreme Court? Seriously, though -- what does it mean?
