
168 Linux for IBM System z9 and IBM zSeries
KERNEL="sd*[a-z]", SYMLINK="scasi/%s{fcp_lun}-%s{wwpn}/disk"
KERNEL="sd*[0-9]", SYMLINK="scasi/%s{fcp_lun}-%s{wwpn}/part%n"
Figure 5-9 shows the entries in the /dev/scsi directory created by our custom
udev naming rules.
Figure 5-9 The /dev/scsia directory created by udev to map SCSI disks
5.4 The FCP LUN Access Control feature
Mechanisms exist to control access to devices in a SAN fabric:
Zoning is defined at the SAN switch, zoning determines whether connectivity
between two WWPNs is permitted.
LUN masking is defined at the storage controller, LUN masking determines if
a WWPN can access a LUN.
When multiple ...