6947ch01.fm Draft Document for Review April 7, 2004 6:15 pm
8 IBM eServer zSeries 990 Technical Guide
Figure 1-3 System overview
1.3.7 I/O connectivity
I/O cage
Each book provides 12 STI links (48 STI maximum with four books) for I/O and coupling
connectivity, and for cryptographic feature cards. Each of these links can either be configured
for ICBs, or be connected to STI distribution cards in the I/O cage(s). The data rate for the STI
is 2 GBytes/sec.
The z990 I/O cage contains seven STI domains. Each domain has the capability of four I/O
slots. A subset of previous zSeries 900 I/O and cryptographic cards is supported by the I/O
cages in the z990.
Installation of an I/O cage remains a disruptive MES, so the Plan Ahead feature remains an
important consideration when ordering a z990 system.
The z990 is a two-frame server. The z990 has a minimum of one CEC cage and one I/O cage
in the A frame. The Z frame can accommodate an additional two I/O cages, making a total of
three for the whole system. Figure 1-4 on page 9 shows the layout of the frames and I/O
cages.
Processor
4 flexible Models (A08, B16, C24 & D32)
64-bit Architecture
32 characterizable PUs, CMOS9G-SOI Technology
SuperScalar
Capacity Upgrade on Demand including Memory and I/O
Hybrid Cooling (Air/Liquid)
Up to 30 Logical Partitions
Optional ETR feature
Memory
64 GB per Model, max system memory 256 GB
Card sizes 8, 16, 32 GB (2 cards per Book)
Bi-directional redundant Ring Structure
I/O
64-bit Architecture (42/48-bit I/O addressing in hardware)
Up to 48 x 2 GB/s Self-Timed Interconnects (STIs)
I/O cage with enhanced power
Up to 4 Logical Channel Subsystems (LCSS)
Up to 120 FICON Express™Channels
FCP SCSI over Fibre Channel
Up to 48 OSA-Express network connectors
Crypto
SSL
PCIXCC
No CHPID number required
Up to 16 HiperSockets
Parallel Sysplex technology
ICB-4 (2 GB/s), ICB-3, ICB-2, ISC-3, IC
CF Duplexing
HMC
Alternate Service Element
Z frame
MDA MDA
MDA MDA
Cargo
IBF
IBF
MDA
A frame
MRU MRU
MDA MDAMDA MDA
MDA
IBF
BPD
Cargo
Dual SEs
Note: The z900 compatibility I/O cage is not supported on the z990.
Note: Parallel channels, OSA-2, OSA-Express ATM, pre-FICON Express channels and
PCICC feature cards are not supported in the z990.
