HP XP20000/XP24000 HP StorageWorks XP Disk Array Mainframe Host Attachment and - Page 18

Logical paths, 8MFLR, Parameter, Note 1

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Parameter Number of Ports per Storage System (DKA Slot Used) 8MFS 8MFLR 8/ 16 / 24 / 32 / 40/ 48 / 56 / 64 / 72 / 80 / 88/ 96 / 104 / 112 / 16 / 24 / 32 / 40/ 48 / 56 / 64 / 72 / 80 / 88/ 96 / 104 / 112 Small Form Pluggable (SFP) Support Maximum Cable Length Short Wave 500m / 300m / 150m (See Note 2) Long Wave 10km Note 1: The XP24000 supports up to six options while the XP20000 supports only one option. Note 2: The maximum cable length values for the 16MFSR apply when 50/125 um multi-mode fiber cable is used. If 62.5/125 um multi-mode fiber cable is used, the values shown above decrease as follows: 500m (100 Mbps) decreases to 300m. 300m (200 Mbps) decreases to 150m. 150m (400 Mbps) decreases to 75m. Logical paths FICON/zHPF channels are capable of fast I/O rates. However, mainframes have a limited number of paths that can be defined for a single control unit. One way to address this limitation is to use logical paths. With multiple logical paths, additional paths are defined to the logical control units, providing the host with access to a greater number of control unit interfaces and greater bandwidth. FICON and FICON/zHPF support identical logical paths. Logical paths are identified through a combination of channel image number, CU image number, channel port address and CU port address. The following two figures show two conceptual drawings of mainframe logical paths. Figure 4 Mainframe Logical Paths (Example 1) . 18 FICON/zHPF and ESCON host attachment

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8MFLR
8MFS
Parameter
/ 16 / 24 / 32 / 40/ 48 / 56
/ 64 / 72 / 80 / 88/ 96 /
104 / 112
8/ 16 / 24 / 32 / 40/ 48 / 56
/ 64 / 72 / 80 / 88/ 96 / 104
/ 112
Number of Ports per Storage System
(DKA Slot Used)
Long Wave
Short Wave
Small Form Pluggable (SFP) Support
10km
500m / 300m / 150m
(See Note 2)
Maximum Cable Length
Note 1
: The XP24000 supports up to six options while the XP20000 supports only one option.
Note 2
: The maximum cable length values for the 16MFSR apply when 50/125 um multi-mode fiber
cable is used. If 62.5/125 um multi-mode fiber cable is used, the values shown above decrease as
follows:
500m (100 Mbps) decreases to 300m.
300m (200 Mbps) decreases to 150m.
150m (400 Mbps) decreases to 75m.
Logical paths
FICON/zHPF channels are capable of fast I/O rates. However, mainframes have a limited number
of paths that can be defined for a single control unit. One way to address this limitation is to use
logical paths. With multiple logical paths, additional paths are defined to the logical control units,
providing the host with access to a greater number of control unit interfaces and greater bandwidth.
FICON and FICON/zHPF support identical logical paths.
Logical paths are identified through a combination of channel image number, CU image number,
channel port address and CU port address. The following two figures show two conceptual drawings
of mainframe logical paths.
Figure 4 Mainframe Logical Paths (Example 1)
.
FICON/zHPF and ESCON host attachment
18