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Operating Systems Linux Red Hat Volume group not activated at boot after SAN migration Post 302952168 by rbatte1 on Friday 14th of August 2015 12:02:58 PM
Old 08-14-2015
We're sure this is not NAS. Plain fibre cards with SCSI devices being detected. We probe down the fibre cards which generates /dev/sdn devices. We then blend the four paths to form multipath devices that we then use as a PV to add to the volume groups.

Much of this is automatic first time, but we did a bit of the hokey-cokey on our first few attempts so after clearing old definitions away the auto-discovery stopped.


Everything seemed fine whilst we had the new LUNs in the VG and in use but the old ones not removed. A boot would complete normally, it's just when we've removed the old LUNs from the VGs that it went off. Perhaps the old LUNs (as part of the VGs) had the VG information on them and so they would respond and the VG would vary on even though there were LUNs still initialising.


All very confusing though SmilieSmilieSmilieSmilie



Robin
 

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fp(7d)								      Devices								    fp(7d)

NAME
fp - Sun Fibre Channel port driver DESCRIPTION
The fp driver is a Sun fibre channel nexus driver that enables fibre channel topology discovery, device discovery, fibre channel adapter port management and other capabilities through well-defined fibre channel adapter driver interfaces. The fp driver requires the presence of a fabric name server in fabric and public loop topologies to discover fibre channel devices. In pri- vate loop topologies, the driver discovers devices by performing PLOGI to all valid AL_PAs, provided that devices do not participate in LIRP and LILP stages of loop initialization. CONFIGURATION
The fp driver is configured by defining properties in the fp.conf file. The fp driver supports the following properties: mpxio-disable Solaris I/O multipathing is enabled or disabled on fibre channel devices with the mpxio-disable property. Specifying mpxio-disable="no" activates I/O multipathing, while mpxio-disable="yes" disables the feature. Solaris I/O multipathing may be enabled or disabled on a per port basis. Per port settings override the global setting for the specified ports. The following example shows how to disable multipathing on port 0 whose parent is /pci@8,600000/SUNW,qlc@4: name="fp" parent="/pci@8,600000/SUNW,qlc@4" port=0 mpxio-disable="yes"; manual_configuration_only Automatic configuration of SCSI devices in the fabric is enabled by default and thus allows all devices discovered in the SAN zone to be enumerated in the kernel's device tree automatically. The manual_configuration_only property may be configured to disable the default behavior and force the manual configuration of the devices in the SAN. Specifying manual_configuration_only=1 disables the automatic con- figuration of devices. FILES
/kernel/drv/fp 32-bit ELF kernel driver (x86) /kernel/drv/amd64/fp 64-bit ELF kernel driver (x86) /kernel/drv/sparcv9/fp 64-bit ELF kernel driver (SPARC) /kernel/drv/fp.conf fp driver configuration file. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |mpxio-disable |Unstable | +-----------------------------+-----------------------------+ |manual_configuration_only |Obsolete | +-----------------------------+-----------------------------+ |Availability |SUNWfctl | +-----------------------------+-----------------------------+ SEE ALSO
cfgadm_fp(1M), prtconf(1M), stmsboot(1M), driver.conf(4), attributes(5), fcp(7D), fctl(7D), scsi_vhci(7D) Writing Device Drivers Fibre Channel Physical and Signaling Interface (FC-PH) ANSI X3.230: 1994 Fibre Channel Generic Services (FC-GS-2) Project 1134-D Fibre Channel Arbitrated Loop (FC-AL) ANSI X3.272-1996 Fibre Channel Protocol for SCSI (FCP) ANSI X3.269-1996 SCSI-3 Architecture Model (SAM) Fibre Channel Private Loop SCSI Direct Attach (FC-PLDA) ANSI X3.270-1996 SCSI Direct Attach (FC-PLDA) ANSI X3.270-1996 SCSI Direct Attach (FC-PLDA) NCITS TR-19:1998 Fabric Loop Attachment (FC-FLA), NCITS TR-20:1998 SunOS 5.10 2 Dec 2004 fp(7d)
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