HP StorageWorks U320e SCSI Host Bus Adapter user guide (AH627-96001, March 2007)

Linux installat
ion t roubleshooting
Table 5 Linux troubleshooting table
Symptoms
Troubleshooti
ng steps
The host adapter driver
was loaded properly and
everything was working, but
the devices do not show
up after the computer was
rebooted.
On some Red Hat Linux distributions, the driver may not automatically load
whenthesystemisbooted.
• To enable driver autoload in Red Hat 4, add the following line to
/etc/modprobe.conf after installing the driver:
alias scsi_hostadapterX express2 WhereXisthenext
available #.
To enable driver autoload in Red Hat 3, add the following line to
/etc/rc.modules after installing the driver:
modprobe express2
(Note: you may need to create /etc/rc.modules and make it
executable with chmod +x /etc/rc.modules)
The host adapter can detect
thetargetdeviceatLUN0
but not the devices at LUN
1orhigherinRedHatLinux
version 3 with kernel 2.4.
• Whenusingversion2.4oftheLinuxkernele.g. RedHat3),deviceson
LUN 1 or higher may not be detected automatically when the driver is
loaded. Thisisaknownissuewiththe2.4kernel. Tomanuallydetect
such devices, issue the following command:
$ echo "scsi add-single-device <h> <b> <t> <l>" >
/proc/scsi/scsi
Where <h> is the host, <b> is the bus (always 0 for ATTO drivers), <t> is
the target, and <l> is the LUN. You can con firm that the device has been
detected by checking for it in /proc/scsi/scsi.
On certain 64-bit platforms,
the driver Makefile may
be unable to detect the
correct CPU architecture when
compiling the driver, an error
such as cc1 : error :
CPU you selected does
not support x86_64
instruction set
• Specif
y the correct architecture when running the m ake command. For
exampl
e: $make install ARCH=x86_64
The connected SCSI devices
are not detected by the
operating system.
• V erify the driver is loaded by examining the output of the Ismod
command for express2.
• Check /proc/scsi/scsi to see a list of devices that are known
by the operating system. This will only list the device at LUN 0 and
its negotiated speed.
User guide
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