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The System z10 will be the last server to support connec-
tions to the Sysplex Timer (9037). Servers that require time
synchronization, such as to support a base or Parallel Sys-
plex, will require Server Time Protocol (STP). STP has been
available since January 2007 and is offered on the System
z10, System z9, and zSeries 990 and 890 servers.
ESCON channels to be phased out: It is IBM’s intent for
ESCON channels to be phased out. System z10 EC and
System z10 BC will be the last servers to support greater
than 240 ESCON channels.
ICB-4 links to be phased out: Restatement of SOD) from
RFA46507) IBM intends to not offer Integrated Cluster Bus-
4 (ICB-4) links on future servers. IBM intends for System
z10 to be the last server to support ICB-4 links.
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IBM intends to support optional water cooling on future
high end System z servers. This cooling technology will
tap into building chilled water that already exists within the
datacenter for computer room air conditioning systems.
External chillers or special water conditioning will not be
required. Water cooling technology for high end System z
servers will be designed to deliver improved energy effi -
ciencies.
IBM intends to support the ability to operate from High
Voltage DC power on future System z servers. This will
be in addition to the wide range of AC power already
supported. A direct HV DC datacenter power design can
improve data center energy effi ciency by removing the
need for an additional DC to AC inversion step.
The System z10 will be the last server to support Dynamic
ICF expansion. This is consistent with the System z9 hard-
ware announcement 107-190 dated April 18, 2007, IBM
System z9 Enterprise Class (z9 EC) and System z9 Busi-
ness Class (z9 BC) – Delivering greater value for every-
one, in which the following Statement of Direction was
made: IBM intends to remove the Dynamic ICF expansion
function from future System z servers.
Statement of Direction