Using the Dump Tools on Red Hat Enterprise Linux
8.5
To obtain kernel dumps of Linux on Z instances, you can
use the tools described, for example, kdump or VMDUMP. You can use DASD, tape, or SCSI dump
devices.
PDF file for Using the Dump Tools on Red Hat Enterprise Linux Planning for dumps Using kdump Red Hat Enterprise Linux .Using a DASD dump device Using DASD devices for multi-volume dump Using a tape dump device channel-attached tape as a dump device. To use a tape, you need to install the stand-alone tape dump tool and perform the dump process. Then, copy the dump to a file in a Linux file system.Using a SCSI disk dump device Linux file system.Creating dumps on z/VM with VMDUMP z/VM® systems, using the z/VM reader as the dump medium.Using virsh dump to create dumps on KVM hosts virsh dump command writes KVM guest dumps to a file in the KVM host file system.Processing dumps Obtaining a dump with limited size mem kernel parameter can make Linux use less memory than is available to it. A dump of such a Linux system does not need to include the unused memory. You can use the zipl size option to limit the amount of memory that is dumped.Command summary