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Installing and Configuring the QLogic HBA and v8.x-Series Driver
The v8.x series driver consists of multiple modules. For example, if
the command lsmod is invoked on a server with a QLA2340-E-SP
HBAs installed, the following three modules will be reported:
◆ qla2xxx_conf - The QLogic Linux driver configuration module
containing information regarding persistent binding.
◆ qla2xxx - The low level QLogic Linux HBA driver module.
◆ qla2300 - The QLogic Linux HBA firmware loader/personality
module for that particular HBA model.
The Linux operating system may panic if any of the following three
commands are invoked prior to performing the procedure in the
“Unloading and reloading the modular QLogic driver” on page 54 to
prepare for removing the driver.
◆ modprobe -r qla2300
◆ modprobe -r qla2xxx_conf
◆ rmmod qla2300
Device reconfiguration: Device numbering
In the Linux kernel, the SCSI addresses are not used in the device
names as they are in other types of UNIX (Sun, SGI, HP-UX, and BSD,
for example). Block device filenames take the form
/dev/sd ln,
where
l is the letter denoting the physical drive and n is the number
denoting the partition on that physical drive. Disk device file names
and major and minor numbers are assigned dynamically at boot time
or device loading time in the order of discovery.
Depending upon the hardware configuration, if a device is added
and the system rebooted, the device numbering might change,
possibly rendering the host's mount table inaccurate. For the most
consistent results and to reduce the possibility of mount table
inaccuracies, new devices should be appended (if possible) to the list
of already attached devices. For example, if the host contains multiple
HBAs, it would be best to append the new device to the last HBA and
to the end of the device list attached to that HBA. This would
eliminate the need to alter the preexisting entries in the mount table,
since the new device could be appended to that as well.
If a new device were added to the first out of two HBAs and the
system rebooted, the devices all shift by one number and the mount
table entries would also need to be shifted by one device. If there is
only one HBA, the new device can more easily be appended to the list
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