IBM eserver Cluster 1350, Installation And Service Manual

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Configuring the storage nodes
The procedure assumes that the following prerequisites have been met:
v A supported version of Linux is installed and running from a local drive. See
“Software version matrix” on page 27.
v
The FAStT storage server is properly configured and connected to a host bus
adapter.
v
The FAStT drives in the storage server are configured into different RAID groups,
storage groups, and LUN through the software that comes with the FAStT
storage server.
Because of the way the Red Hat Linux version 9 loads SCSI drivers and assigns
them to dev/sda and dev/sdb, problems can result if more than one SCSI host
adapter board (Adaptec SCSI controller for local drives or QLogic for Triton
connection) is installed on the system and you use the
scsi_hostadapter
alias.
When the system is restarted, the operating system detects the QLogic controller
before detecting the Adaptec controller, which will cause the system problems. To
avoid this problem, follow the Installing the storage node software and modify the
order of the contents of the etc/modules.conf file.
Installing the storage node software
Complete the following steps to install storage node software:
1. If you have not already done so, turn off the storage controllers or disconnect
the Fibre-Channel cable running to each storage controller.
2. For Red Hat Linux version 9, edit the etc/modules.conf file to put the host
adapters in the correct order and to add the parameter scsi_mod max_scsi_luns
to the file.
Important:
v
Because the system is running a modular kernel, the Adaptec SCSI device
driver (alias scsi_hostadapter aic7xxx) must be probed before any other SCSI
adapters so that the kernel will be able to find the root device during the
initialization phase. Also, the QLogic QLas device driver (alias
scsi_hostadapter2 qla2x00) must be the last SCSI host adapter listed in the
file.
v If there are other SCSI host adapter boards installed on the system and the
scsi_hostadapter alias is used, define a different alias for the qlogic Qla driver
and be sure to add it after the other SCSI modules so that the SCSI devices
names already in use are not renumbered the next time the system is
started. You can do this by appending a number at the end of the scsi_host
adapter word, for example, alias scsi_hostadapter n qla2x00 (where n is an
alphanumeric number from 1 through 9).
The original module.conf file might be similar to the following example:
alias eth0 e1000
alias scsi_hostadapter qla2x00
alias scsi_hostadapter1 aic7xxx
alias scsi_hostadapter2 ips
alias eth1 e1000
alias parport_lowlevel parport_pc
alias scsi_hostadapter3 aic7xxx
alias scsi_hostadapter4 aic7xxx
alias usb-controller usb-ohci
The modified module.conf file might be similar to the following example:
alias eth0 e1000
alias scsi_hostadapter1 aic7xxx
alias scsi_hostadapter2 ips
alias eth1 e1000
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IBM
Eserver
Cluster 1350 Installation and Service Guide