Emulex LightPulse LPe1105-M4 HBA Installationsanleitung PDF herunterladen (Seite 171)

(CLARiiON only): Required /etc/modules.conf edit for RHEL 2.1, RHEL 3.0, and SLES 8.0 default modular

kernels

171

Special Instructions

(CLARiiON only): Required /etc/modules.conf edit for RHEL 2.1,

RHEL 3.0, and SLES 8.0 default modular kernels

When a Linux host is attached to both SPs in a CLARiiON storage

system, the driver will report a disconnected LUN 0 on SPB and a

failure to read the capacity of the device. The Unisphere/Navisphere

Host Agent requires that disconnected LUN 0 be reported

properly.-39Instal

ling an

A device file name is allocated to the disconnected LUN 0 in the /dev

filesystem, but the device cannot be mounted, partitioned, or

otherwise accessed.

An example of a disconnected LUN 0 being reported in

/var/log/messages:

Red Hat and SuSE have added a parameter to the SCSI stack

(

scsi_scan.c file) to allow access to devices marked as offline.

For RHEL, the

max_scsi_luns parameter must be enabled in

/etc/modules.conf. In the default Red Hat kernels,

CONFIG_SCSI_MULTI_LUN is disabled. As a result, if the target 0 LUN

0 disappears from the storage group and the host is rebooted or the

driver unloaded and reloaded, the host will see only the ghost LUNs

(with ArrayCommPath disabled) or the LUNZ (with

ArrayCommPath enabled).

By default, the SuSE SLES 8 kernel has enabled the

CONFIG_SCSI_MULTI_LUN parameter. Therefore, there is no need to

add the

max_scsi_luns parameter to the /etc/modules.conf file on

SLES 8 SP3.

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Emulex LightPulse LPe1105-M4 HBA Installationsanleitung Seite 171