z890 Channels and I/O Connectivity
Normal Multiple Image Facility (MIF) sharing of a chan- nel is confi ned to a single LCSS. The z890 supports the spanning of the channels types: IC, HiperSockets, FICON Express, FICON Express2,
Channel Spanning
ZOS1 ZOS2 ZOS3 ZOS4 ZOS5 LNX1 | |||
HiperSockets |
|
| |
CHPID 22 | LCSS0 | LCSS1 | CHPID 22 |
A z890 has a total of 28 I/O slots in one I/O cage. These slots can be plugged with a mixture of cards providing the I/O connectivity, networking connectivity, coupling and cryptographic capability of the server.
Up to 420 ESCON Channels
The high density ESCON feature has 16 ports, 15 of which can be activated for customer use. One port is always reserved as a spare which is activated in the event of a failure of one of the other ports. For high availability the ini- tial order of ESCON features will deliver two cards and the active ports will be distributed across those cards. After the initial install the ESCON features are installed in incre- ments of one. ESCON channels are available in
Up to 40 FICON Express Channels
The z890 supports up to 40 FICON Express channels. It offers a 25% increase in FICON Express channels over the z800. FICON Express is available in long wavelength (LX) and short wavelength (SX) features. Each FICON Express feature has two independent ports which support two channels per card. The LX and SX cannot be intermixed on a single feature. The maximum number of FICON Express features which can be installed in the I/O cage is 20.
The z890 supports up to 40 FCP channels for attach- ment to Small Computer System Interface (SCSI) disks in a Linux environment. The same
16
