Qlogic SANsurfer FC/CNA HBA CLI Manual de usuario descargar pdf (Pagina 20)

20 Dell Compellent Using Storage Center with FCoE and Linux

Rescanning session [sid: 4, target: iqn.2002-03.com.compellent:5000d31000006924,

portal: 172.16.26.4,3260]

Looking at the messages log, we can see that new disk devices have been created.

# tail /var/log/messages

Jul 11 20:16:23 techtip kernel: sd 6:0:0:1: [sdc] Write Protect is off

Jul 11 20:16:23 techtip kernel: sd 6:0:0:1: [sdc] Write cache: disabled, read

cache: enabled, doesn't support DPO or FUA

Jul 11 20:16:23 techtip kernel: sd 7:0:0:1: [sdd] Write Protect is off

Jul 11 20:16:23 techtip kernel: sd 7:0:0:1: [sdd] Write cache: disabled, read

cache: enabled, doesn't support DPO or FUA

Jul 11 20:16:23 techtip kernel: sdc: unknown partition table

Jul 11 20:16:23 techtip kernel: sd 6:0:0:1: [sdc] Attached SCSI disk

Jul 11 20:16:23 techtip kernel: sdd: unknown partition table

Jul 11 20:16:23 techtip kernel: sd 7:0:0:1: [sdd] Attached SCSI disk

Jul 11 20:16:23 techtip multipathd: sdc: add path (uevent)

Jul 11 20:16:23 techtip multipathd: sdd: add path (uevent)

The command scsi_id can be used to discover the unique name for the two paths.

# scsi_id -u -g /dev/sdc

36000d310000069000000000000000efb

# scsi_id -u -g /dev/sdd

36000d310000069000000000000000efb

Because both devices have the same unique name, they are actually simply two paths to the same actual

volume on the Storage Center. In order to create a multipath object across both paths, the

/etc/multipath.conf file needs to be edited (note the existence of another multipath object, this is the boot

volume from the FCoE connected Storage Center).

blacklist_exceptions {

wwid "36000d3100002d4000000000000000005"

wwid "36000d310000069000000000000000efb"

}

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Qlogic SANsurfer FC/CNA HBA CLI Manual de usuario Pagina 20