Month: April 2011

OpenVMS – SCSSYSTEMID

SCSSYSTEMID (G)
Specifies a number that identifies the computer. This parameter is not dynamic. SCSSYSTEMID is the low-order 32 bits of the 48-bit system identification number.

If the computer is in an OpenVMS Cluster, specify a value that is unique within the cluster. Do not use zero as the value.

If the computer is running DECnet for OpenVMS, calculate the value from the DECnet address using the following formula:

SCSSYSTEMID = ((DECnet area number) * 1024) + (DECnet node number)

Example: If the DECnet address is 2.211, calculate the value as follows:

SCSSYSTEMID = (2 * 1024) + 211 = 2259

AIX – Mounting ISO images

There is a known problem with mounting ISO images on the AIX platform. To workaround the problem, complete the following instructions:

Obtain the size of the image, then identify the nearest multiple of 128 MB that will provide enough space for the image. For example, the image of CD-ROM is approximately 650/700 MB, so use 768 MB as an image size.

Make a logical volume of this size. Ensure that there is enough space on the physical volume. For example, hdisk0.

# mklv -y cdlv -s n -L /dev/cdlv rootvg 768M hdisk0

If the command fails, increase the volume size by a multiple of 128.

Use the dd command to create a pseudo-device. Ensure that the partition has enough space for the pseudo-device. In the following example command, the pseudo-device is /dev/cdlv.

# dd if=/opt/iso/cd.iso of=/dev/cdlv

Note that this command may take a long time and will create two dd processes.

Mount the device like a CD-ROM in AIX. Ensure that the mount point exists.

# mount -v cdrfs -o ro /dev/cdlv /mnt/iso