Three methods can be used to configure a new disk. Once a disk is configured, it is available for use by the system. If the Logical Volume Manager (LVM) is to use this disk, it must also be made a physical volume.
Use Method 0 if you are able to shut down and power off the system before attaching the disk. Otherwise, use Method 1 or Method 2. Use Method 1 if you know only the location of the disk. Use Method 2 if you know more information about the disk, such as the subclass, type, parent name, and where it is connected.
The new disk must be connected to the system and powered on. Connect the new drive according to the procedure found in the POWERstation and POWERserver Operator Guide.
Attention: If possible, shut down and power off any system to which you are attaching a physical disk.
Use this method when it is possible to shut down and power off the system before attaching the disk. Upon boot-up, the cfgmgr command automatically configures the disk. After boot-up is complete, log in as root and run lspv, look for a new disk entry in the output. For example:
hdisk1 none none
hdisk1 00005264d21adb2e none
After you have determined the name of the newly configured disk, note whether the new disk is listed with a PVID (16-digit number). If the new disk does not have a PVID, then use the procedure Making an Available Disk a Physical Volume to allow the disk to be used by the LVM. If the new disk did not appear in the lspv output, refer to AIX Version 4.3 Installation Guide.
Used this method when it is not possible to shut down or power off the system before attaching the disk.
hdisk0 000005265ac63976 rootvg
cfgmgr
hdisk1 none none
hdisk1 00005264d21adb2e none
After you have determined the name of the newly configured disk, use the procedure Making an Available Disk a Physical Volume to allow the disk to be utilized by the Logical Volume Manager. If the new disk is not displayed in the list, refer to AIX Version 4.3 Installation Guide.
Used this method when it is not possible to shut down or power off the system before attaching the disk. This method requires more information about the new disk but is usually faster than Method 1. To use method 2, you must know the following information:
Once you have this information, continue through the following steps:
mkdev -c disk -s subclass -t type -p parentname \ -w whereconnected -a pv=yes
The pv=yes attribute makes the disk a physical volume and writes a boot record with a unique physical volume identifier onto the disk (if it does not already have one).
The following is an example for adding a 670 MB disk with a SCSI ID of 6 and logical unit number of 0 to the scsi3 SCSI bus:
mkdev -c disk -s scsi -t 670mb -p scsi3 -w 6,0 -a pv=yes