Chapter 3. I/O system structure 75
Draft Document for Review April 7, 2004 6:15 pm 6947ch03.fm
The following cryptographic feature cards are supported in the zSeries 990 server:
򐂰Up to 4 Peripheral Component Interconnect X Cryptographic Coprocessor (PCIXCC)
򐂰Up to 12 Peripheral Component Interconnect Cryptographic Accelerator (PCICA)
All z990 servers have two frames. The A frame holds the CEC cage on top and one I/O cage
on the bottom. The Z frame holds up to two optional I/O cages, which may be needed to
accommodate the I/O configuration requirements.
Figure 3-1 z990 frames and cages
Additional optional I/O cages may be required to install additional I/O and cryptographic cards
during an upgrade. The first optional I/O cage is placed at the bottom of the Z frame, and the
second optional I/O cage is at the top, as shown in Figure3-1. Although I/O or cryptographic
card installation is concurrent, an I/O cage installation requires an outage.
3.2 I/O cages
As mentioned, the z990 server can have up to three I/O cages to house the I/O cards and
cryptographic cards required by a configuration.
Each I/O cage has 28 I/O slots available for I/O cards and cryptographic cards installation and
up to seven I/O domains. Each I/O domain is made up of up to four I/O slots, as shown in
Figure 3-2 on page 76.

Z Frame

MDA MDA
MDA MDA
IBF
IBF
MDA

A Frame

MRU MRU
MDA MDA
MDA
IBF
BPD

CEC Cage

1st I/O Cage

(standard)

2nd I/O Cage

(optional)

3rd I/O Cage

(optional)