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Fully Autonomous HA/DR – Myth or Reality?

Where I grew up, the myth of the jackalope was pervasive. I would see this creature stuffed hanging on the wall of my local hardware store. I was always on the look out for a true living jackalope. Needless to say, I never saw a single one except those hanging on the walls of some of the local shops. As I grew up, I concluded that some talented taxidermist who would take the skull of a jackrabbit and combine it with the antlers of a small deer or antelope to create the jackalope myth.

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AIX, Performance, Storage, System Administration

Creating a large file
When you wish to create a very large file for test purposes, try this command:

# dd if=/dev/zero bs=1024 count=2097152 of=./test.large.file
This wil create a file consisting of 2097152 blocks of 1024 bytes, which is 2GB. You can change the count value to anything you like.

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Mapping Large Numbers of Disks to Virtual SCSI Hosts in a IBM VIO Server Environment

It appears that FOR loops with number ranges defined, using the format {1..10} do not work in an IBM VIO server environment even from the oem_setup_env shell which IBM prefers you stay away from in the first place. However, when you are dealing with mapping large numbers of disks to virtual SCSI hosts, you need a bit of a helping hand. For example, IBM i V6R1 and higher allow you to use non-520 Byte storage devices for disk allocation as long as the disks are presented as VSCSI through a VIO server which then formats the disks as 520 Byte disks.

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