June 2003
Intermediate to advanced
464 pages
10h 33m
English
Linux disk support for the traditional zSeries disks is provided by the DASD driver code, dasd.c. It provides support for Count-Key-Data (CKD) and Fixed Block Address (FBA) disk devices, as well as VM minidisks. The DASD driver uses channel I/O to perform read and write operations.
There are currently three ways to format disks used by Linux:
dasdfmt
The DASD driver in Linux for zSeries and S/390 comes with the dasdfmt utility to format the disks. It formats all tracks on the disk with a fixed block size. There is no support for this particular format in existing S/390 software.
CMS FORMAT
The FORMAT program in CMS also formats the disk with fixed block size, but adds a special eye catcher ...