Since 2005 (introduced with z/VSE 3.1) z/VSE supports SCSI devices in addition to FBA and ECKD devices, which gives z/VSE customers more storage options. Especially with the IBM Storwize V7000 our SCSI support is getting more and more customer interest.

Applications can access SCSI disks via FBA channel programs or FBA interfaces. . FBA channel programs are translated at low level I/O interfaces to SCSI commands. Disks like IBM System Storage DS8870, IBM Storwize V7000 or IBM XIV support the SCSI architecture. z/VSE's SCSI support is transparent to FBA and device independent applications.

If you want to migrate from ECKD to SCSI devices please consider that you can not Fast Service Upgrade (FSU) to a SCSI device (FSU only works from ECKD to ECKD or SCSI to SCSI). If your applications is not written device independent, you need to adapt them. The same is true for Job Control statements, e.g. EXTENT information needs to be changed from tracks to blocks.

To provide some more information we just published a SCSI white paper. You may download it here.
It's on our web page for technical articles.

Some general information is in our z/VSE Planning book. The link to it is on the z/VSE documentation page.

Marcações:  white_paper scsi disk documentation device vse fba