January 2006
Intermediate to advanced
226 pages
6h 11m
English
book
Linux for IBM System z9 and IBM zSeries
by Gregory Geiselhart, Robert Brenneman, Eli Dow, Klaus Egeler, Torsten Gutenberger, Bruce Hayden, Livio Sousa
Content preview from Linux for IBM System z9 and IBM zSeries
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176 Linux for IBM System z9 and IBM zSeries
Figure 5-14 A multipath scenario
In the figure, two paths to a single physical LUN (0x5209000000000000). Linux
accesses each path using a separate device:
Device /dev/sdb accesses the LUN using WWPN 0x5005076300cd9589 over
FCP device b009.
Device /dev/sdg accesses the LUN using WWPN 0x5005076300c19589 over
FCP device b100.
5.5.1 Multipathing using EVMS on SLES9
In this section, we illustrate using multipathing using EVMS on SLES9.
Figure 5-15 on page 177 shows the subchannel and udev mapping for the disks.
IBM zSeries Open Storage Attachment
z990
Linux
/dev/sdb /dev/sdg
FCP switch
ESS
LUN
0x5209000000000000 ...
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