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Full Discussion: Storage paths
Operating Systems AIX Storage paths Post 302225026 by Storeman on Thursday 14th of August 2008 10:57:09 AM
Old 08-14-2008
PHP Storage paths

Have connected a non-IBM storage device to AIX host via fibre channel. If the storage is rebooted or a raid controller fails over whilst connected to the host, the paths that drop do not come back online when the ports become active again.

I have tried enabling dynamic tracking and delayed_fail on the FC adapter and have played with numerous timeout setting but to no avail. AIX does not recognise when a failed path is available again unless I either reboot the host or initiate cfgmgr from the command line to force the FC adapter to rescan.

What needs to be changed to allow AIX to automatically recognise when a dead path is back online?
 

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hpfc(7D)							      Devices								  hpfc(7D)

NAME
hpfc - Agilent fibre channel host bus adapter SYNOPSIS
PCI pci103c DESCRIPTION
The hpfc fibre channel host bus adapter is a SCSA compliant nexus driver that supports all Agilent fibre channel host bus adapters, includ- ing the HHBA5100x, HHBA5101x, and HHBA5121x models. Agilent host bus adapters support the fibre channel protocol on private fibre channel arbitrated loops and fabrics. The driver supports up to ten host bus adapters, with a maximum of 125 fibre channel devices on each host bus adapter. The hpfc driver supports a maximum of 256 LUNs per target. The hpfc driver does not support the BIOS Int 13 feature, which enables the booting of an operating system. As a result, you should not install an operating system on devices attached to the hpfc driver. CONFIGURATION
The hpfc driver attempts to configure itself using the information in the /kernel/drv/hpfc.conf configuration file. By default, the driver supports only LUN 0 for each target device. To add multiple LUN support, modify the /kernel/drv/sd.conf file. Before upgrading the hpfc driver, backup the sd.conf file to save customized LUN settings and then use pkgrm(1M) to remove the old version of the driver. The host bus adapter port is initialized to FL_Port when connected to a fabric switch. To change it to F_Port, add the init_as_nport=1 entry to the hpfc.conf file and reboot the system. To conserve system resources, at least one disk drive must be attached to the hpfc driver. If no devices are attached, the driver will not load. FILES
/kernel/drv/hpfc 32-bit ELF kernel module /kernel/drv/sparcv9/hpfc 64-bit ELF kernel module /kernel/drv/hpfc.conf Driver configuration file /kernel/drv/sd.conf SCSI disk configuration file ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Architecture |x86, SPARC | +-----------------------------+-----------------------------+ SEE ALSO
luxadm(1M), pkgrm(1M), prtconf(1M), driver.conf(4), attributes(5), ses(7D), ssd(7D) ANSI X3.272-1996, Fibre Channel Arbitrated Loop (FC-AL), ANSI X3.269-1996, Fibre Channel Protocol for SCSI (FCP), ANSI X3.270-1996, SCSI-3 Architecture Model (SAM), Fibre Channel Private Loop SCSI Direct Attach (FC-PLDA) SunOS 5.10 10 Oct 2000 hpfc(7D)
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