HP P6000 Replication Solutions Manager Administrator Guide (T3680-96069, June 2012)

4. Count the number of /dev/sg files that end in numeric values. (The /dev/sg files that end

in alphabetic characters are links to the numeric versions and are not used.)

5. If there are fewer /dev/sg files (from Step 4) than devices (from Step 2), run makesg.sh,

specifying the total number of devices. You need one /dev/sg device file for each SCSI

device, including direct-attached SCSI devices, SAN arrays, and each LUN presented to the

host.

The makesg.sh utility creates missing /dev/sg device files up to the number specified. The

/dev/sg files that already exist are not affected.

Resolving suspended SUSE Linux host agent

If a SUSE Linux host becomes unresponsive during a job containing the CreateHostVolume

command, the host agent may have suspended waiting for the hp_rescan utility to complete. To

confirm this, check the status of the hp_rescan utility in the host process list. If the utility appears

to be suspended, reboot the host.

IMPORTANT: Take precautions to minimize the effects of a shutdown on users and on running

and scheduled jobs.

HP P6000 DC-Management Linux requirements and considerations

• Manual offline HP P6000 DC-Management is supported. Taking the volume offline requires

that it be unmounted. Online resizing and DC-Management policies are not supported with

Linux.

• Logical Volume Manager (LVM) volume groups are not supported.

• Nonpartitioned (whole) disks are supported. Partitioned disks are not supported.

• HP P6000 DC-Management is supported on RHEL AS 5.1 or later, and SLES 10 SP1 or later,

and SLES 11 SP2.

• EXT2 and EXT3 file systems are supported. Veritas File System (VxFS) is not supported.

• Extend and shrink are supported.

OpenVMS

OpenVMS filters devices that do not support direct Business Copy replication, such as bound

volume sets, shadow sets, RAID, and striping.

OpenVMS 8.3 Alpha servers

The following kits for HP OpenVMS 8.3 Alpha servers are available on the HP website http://

www11.itrc.hp.com/service/patch/ovmsAggrIndexPage.do:

• Latest VMS83A_FIBRE_SCSI patch kit

• Latest HP OpenVMS V8.3 update kit

Sun Solaris

This section describes special replication procedures for Sun Solaris hosts.

Configuring Sun Solaris hosts with MPxIO

To fully enable replication manager jobs on Sun Solaris hosts using MPxIO, you must add a line

to the SCSI VHCI configuration file in the Solaris kernel. Navigate to the file /kernel/drv/

scsi_vhci.conf and add the following line to the end of the file:

ddi-forceattach=1;

Save and close the file.

38 Working with operating systems