S/390 Partners in Development: ThinkPad Enabled for S/390

Chapter 5. Additional Topics 45

3390-2 OS39PA A83 DB2

3390-2 OS3PAA A84 Transaction Server (CICS)

3390-1 WORK01 A90 Work (storage) volume

3390-1 WORK02 A91 Work (storage) volume

3390-1 WORK03 A92 Work (storage) volume

(about 12 GB still available)

Since the CD-ROM drive and the second hard disk cannot be installed at the same time, it

was necessary to stage volumes from the AD CD-ROMs. That is, we unzipped and

converted (using ckdconvaws) OS39DA, OS3DAA, OS3DAB, OS39PA, and OS3PAA onto the

first hard drive (mount point /s390).

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The process of unzipping and installing a volume from

an AD CD-ROM system is described in “Installation tasks” on page 24. We then shut down

Linux, removed the CD-ROM drive and installed the second hard disk, and rebooted Linux.

We then copied the appropriate files to the second disk (mount point /s391):

$ cp /s390/OS39DA /s391/OS39DA

$ cp /s390/OS3DAA /s391/OS3DAA

$ cp /s390/OS3DAB /s391/OS3DAB

$ cp /s390/OS39PA /s391/OS39PA

$ cp /s390/OS3PAA /s391/OS3PAA

$ rm /s390/OS39DA

$ rm /s390/OS3DAA

$ rm /s390/OS3DAB

$ rm /s390/OS39PA

$ rm /s390/OS3PAB

The three work volumes are not part of the AD system. We created them with the ckdfmt

command:

$ ckdfmt -n /s391/WORK01 3390-1

$ ckdfmt -n /s391/WORK02 3390-1

$ ckdfmt -n /s391/WORK03 3390-1

5.5.4 Alternative method

We described using two FLEX-ES definition files as a way to deal with a second hard disk

drive that is not always present. An alternative is to use a single FLEX-ES resources

definition file that specifies all the emulated S/390 drives on the second hard disk as

OFFLINE. Two startup shell scripts would be used. One (for use when both hard disks are

present) would contain a series of FLEX-ES mount commands to, in effect, bring the volumes

on the second hard disk online.

5.6 FLEX-ES FakeTape on OS/390

FakeTape

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emulates tape devices using Linux disk files instead of tape drives. Provided the

appropriate tape devices are defined in the OS/390 IODF configuration data set, FakeTape

will emulate any type of tape drive from 3420 to 3490-E. Because FakeTape always writes

and reads the same format to/from Linux, it operates at the same speed for all different

emulated tape device types. We ran several tape jobs using IEBGENER, IEBCOPY and

DFDSS and they all performed well. Our definitions included a 3480 tape drive at address

560.

This is one of the jobs we executed:

//P390T JOB 1,OGDEN,MSGCLASS=X

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We elected not to restore the other AD volumes containing IMS and WebSphere components.

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FakeTape is a trademark of Fundamental Software, Incorporated.