This page describes various ways of creating and loading DASD volumes for use with Hercules.
Using pre-built DASD images
Creating, formatting, and loading DASD volumes
Building a DASD volume from unloaded PDS files
Other DASD utilities
IBM distributes pre-built OS/390 and z/OS systems on two different CD-ROM packages:
Both of these packages contain pre-built DASD image files which simply need to be unzipped onto your hard drive. The unzipped images can be directly read by Hercules.
Be aware, however, that you cannot use the ADCD images because the PartnerWorld scheme requires you to purchase or lease an IBM approved machine in order to obtain the ADCD, and the software on the ADCD is licensed for use only on the machine that it was shipped with. See http://www.ibm.com/servers/enable/site/zinfo/adcd.html. If you want Hercules to be an approved machine so that you can use the ADCD, then I suggest you lobby IBM Developer Relations at the address given on their web page.
Different rules apply to the OS/390 and z/OS DemoPkg CD which is available only to IBM employees and business partners. If you fall into this category then you probably know what the rules are -- I don't :-(
The dasdinit program must first be run from the Unix shell prompt to create a file containing an empty DASD volume.
The format of the dasdinit command is:
HHC01413I Hercules utility 'dasdinit' - DASD image file creation program; version 3.07-svn-7593 HHC01414I (c) Copyright 1999-2011 by Roger Bowler, Jan Jaeger, and others HHC02448I Usage: dasdinit [-options] filename devtype[-model] [volser] [size] Builds an empty dasd image file: dasdinit [-options] filename devtype[-model] [volser] [size] where: -v display version info and help -z build compressed dasd image file using zlib -bz2 build compressed dasd image file using bzip2 -0 build compressed dasd image file with no compression -lfs create only one very large output file (if supported) -a build dasd image file that includes alternate cylinders (option ignored if size is manually specified) -r build 'raw' dasd image file (no VOL1 or IPL track) -b make wait PSW in IPL1 record a BC-mode PSW (default is EC-mode PSW) -m enable wait PSW in IPL1 record for machine checks (default is disabled for machine checks) -linux null track images will look like linux dasdfmt'ed images (3390 device type only) filename name of dasd image file to be created devtype CKD: 2305, 2311, 2314, 3330, 3340, 3350, 3375, 3380, 3390, 9345 FBA: 0671, 3310, 3370, 9313, 9332, 9335, 9336 model device model (implies size) (opt) volser volume serial number (1-6 characters) (specified only if '-r' option not used) size number of CKD cylinders or 512-byte FBA sectors (required if model not specified else optional)
Note that the defaults for the wait PSW written to the IPL1 record have changed from earlier releases of Hercules. In the past, the wait PSW created by dasdinit was a BC-mode PSW enabled for machine check interrupts. The current default for the wait PSW is EC-mode, disabled for machine checks. To obtain the earlier behavior, run dasdinit with the "-b" and "-m" flags.
The current list of device types and models supported is:
CKD DEVICES alt devtype-model cyls cyls 2311 [*] 2311-1 200 2 2314 [*] 2314-1 200 3 3330 [*] 3330-1 404 7 3330-2 808 7 3330-11 808 7 3340 [*] 3340-1 348 1 3340-35 348 1 3340-2 696 2 3340-70 696 2 3350 [*] 3350-1 555 5 3375 [*] 3375-1 959 1 3380 [*] 3380-1 885 1 3380-A 885 1 3380-B 885 1 3380-D 885 1 3380-J 885 1 3380-2 1770 2 3380-E 1770 2 3380-3 2655 3 3380-K 2655 3 EMC3380K+ 3339 3 EMC3380K++ 3993 3 3390 [*] 3390-1 1113 1 3390-2 2226 1 3390-3 3339 1 3390-9 10017 3 3390-27 32760 3 3390-54 65520 3 9345 [*] 9345-1 1440 0 9345-2 2156 0 FBA DEVICES devtype-model blocks 3310 [*] 3310-1 125664 3370 [*] 3370-Al 558000 3370-B1 558000 3370-A2 712752 3370-B2 712752 9313 [*] 9313-1 246240 9332 [*] 9332-200 360036 9332-400 360036 9332-600 554800 9335 [*] 9335-1 804714 9336 [*] 9336-10 920115 9336-20 1672881 9336-25 1672881 0671-08 513072 0671 574560 0671-04 624456
[*] size may be specified else size defaults to the first listed model.
For CKD volumes which exceed 2GB, such as the 3390-3, and the -lfs parameter is not specified, the DASDINIT program will create multiple files by appending the characters _1, _2, _3 etc. to the file name specified on the command line. These characters are inserted before the first dot (.) after the last slash (/). If there is no dot, then the characters are appended to the end of the name. Each file contains a whole number of cylinders. Hercules CKD support recognizes the files as belonging to a single logical volume. Specify the full name of just the first file in the Hercules configuration file (e.g. "filename_1").
The DASDINIT program cannot create FBA volumes exceeding 2GB unless the -lfs parameter is specified and large file size is supported on your platform..
To create a 3330 model 1 CKD volume consisting of 404 cylinders (plus 7 alternate cylinders too) with volume serial number WORK01 in a file called work01.151:
dasdinit -a work01.151 3330-1 work01
To create a compressed 3350 CKD volume consisting of 560 cylinders (555 cylinders plus the 5 alternate cylinders) with volume serial number SYSRES in a file called dosvs34.24f:
dasdinit -a -bz2 dosvs34.24f 3350-1 sysres
To create a 3370 FBA volume with only 100000 sectors (instead of the usual 558000 sectors) with volume serial number WORK02 in a file called mini.work02.140:
dasdinit mini.work02.140 3370 work02 100000
To create a 3390 model 3 (triple density) CKD volume of 3339 cylinders with volume serial number WORK03:
dasdinit triple.a88 3390-3 work03
Because this volume exceeds 2GB, DASDINIT will create two files with triple_1.a88 containing cylinders 0-2518 and triple_2.a88 containing cylinders 2519-3339. If you specify
dasdinit -lfs triple.a88 3390-3 work03
then DASDINIT will create a single file triple.a88 containing all the cylinders. Your platform must support large file size to specify the -lfs option.
After creating a DASD volume you can format it with a program such as standalone IBCDASDI or ICKDSF.
Here is an example of the IBCDASDI control statements required to initialize a 3330 volume:
WORK01 JOB 'INITIALIZE 3330 WORK VOLUME' MSG TODEV=1052,TOADDR=009 DADEF TODEV=3330,TOADDR=151,IPL=NO,VOLID=WORK01,BYPASS=YES VLD NEWVOLID=WORK01,OWNERID=HERCULES VTOCD STRTADR=1,EXTENT=5 END
To run IBCDASDI, place the above statements in a file called init3330.txt and start Hercules in S/370 mode with a configuration file containing these statements:
CPUSERIAL 001234 CPUMODEL 3145 MAINSIZE 2 CNSLPORT 1052 ARCHMODE S/370 0009 1052 000A 1442 ibcdasdi.rdr 000C 1442 init3330.txt 0151 3330 work01.151
After IPLing from card reader device 00A, connect a telnet client to port 1052, and press enter. At the IBCDASDI prompt, enter:
Next you need to create a full volume dump file on your mainframe and convert it to AWSTAPE format using the tapeconv.jcl job in the Hercules source directory. The AWSTAPE file can then be downloaded in binary format to your PC where it can be defined as a virtual tape drive in the Hercules configuration file.
A standalone program can now be IPLed into Hercules to restore the volume image from the virtual tape onto the formatted virtual DASD volume.
The dasdload program can be run from the Unix shell prompt to create a new DASD image file and load it with data from unloaded PDS files.
The format of the dasdload command is:
dasdload [options] ctlfile outfile msglevel
Note that the dasdload defaults for the wait PSW written to the IPL1 record have changed from earlier releases of Hercules. In the past, the wait PSW created by dasdload on volumes without IPL text was a BC-mode PSW enabled for machine check interrupts. The current default for the wait PSW is EC-mode, disabled for machine checks. To obtain the earlier behavior, run dasdload with the "-b" and "-m" flags.
The control file required by the dasdload program is an ASCII text file consisting of a volume statement followed by one dataset statement for each dataset to be created.
The format of the volume statement is:
volser devtype[-model] [cyls [ipltext] ]
cylsis coded as
0or is omitted, then the default size for the device type and model is used.
The format of a dataset statement is:
dsname method units pri sec dir dsorg recfm
lrecl blksize keylen
All parameters except dsname and method are optional. Defaults of zero are supplied for DCB parameters. For datasets loaded with the XMIT method, the DCB parameters are taken from the unloaded PDS, and the minimum space allocation required to load the dataset is used unless a larger quantity is specified. If space allocation is omitted, the default is TRK 1 0 0. If CYL is specified without any primary quantity then the default space allocation is 1 cylinder or the minimum number of cylinders required to load the dataset, whichever is larger.
 To create a 2314 volume in a file called sysres.230 using the control file sysres.plf with message level 2:
dasdload sysres.plf sysres.230 2
An example control file is shown below:
# Pack layout file for MFT system residence volume
sysres 2314 * ieaipl00.rdr
sys1.parmlib xmit /cdrom/os360/reslibs/parmlib.xmi
sys1.imagelib xmit /cdrom/os360/reslibs/imagelib.xmi
sysctlg cvol trk 1 0 0 ps f 256 256 8
sysvtoc vtoc trk 5
sys1.logrec dip trk 1 0 0
sys1.nucleus xmit /cdrom/os360/reslibs/nucleus.xmi cyl
sys1.svclib xmit /cdrom/os360/reslibs/svclib.xmi cyl
sys1.sysjobqe empty cyl 2 0 0 da f 176 176 0
sys1.dump empty cyl 10 0 0 ps u 0 3625 0
 To create a compressed 3390-3 volume in a file called linux.500 containing a bootable linux system for linux/390 installation using the control file linux.prm:
dasdload -z linux.prm linux.500
An example control file is shown below:
# Build a bootable linux disk
# [Note: the dataset names (sys1.linux. ...) are hard-coded in
# linuxipl.obj and cannot be changed without rebuilding it]
linux 3390-3 * linuxipl.obj
sys1.linux.parmfile SEQ images/redhat.prm trk 1 0 0 ps fb 1024 1024
sys1.linux.tapeipl.ikr SEQ images/kernel.img trk 200 0 0 ps fb 1024 1024
sys1.linux.initrd SEQ images/initrd.img trk 200 0 0 ps fb 1024 1024
On an OS/360 system, the Open/Close/EOV modules in SYS1.SVCLIB have XCTL tables embedded within them. These tables contain TTRs pointing to other modules, and these TTRs need to be adjusted after loading SVCLIB to DASD. OS/360 provides a program called IEHIOSUP to perform this function, but the catch is that you can't run IEHIOSUP until you have the system up and running, and you can't IPL until you have fixed the XCTL tables. To solve this problem, Hercules provides a program called dasdisup which can be run from the Unix command line after running dasdload.
The format of the dasdisup command is:
dasdisup outfile [sf=shadow-file-name]
Note: do not use this procedure except on OS/360 IPL volumes; other operating systems do not have XCTL tables.
These programs can be used to extract data from CKD DASD images by means of commands issued at the Unix shell prompt.
DASDLS, written by Malcolm Beattie, is a command to let you list the names of the datasets contained in disk images.
The command format is:
dasdls ckdfile [sf=shadow-file-name] ...
where ckdfile is the name of a Unix file containing a CKD volume
and shadow-file-name (optional) is the name of the associated
DASDCAT, written by Malcolm Beattie, is a command to let you read datasets from disk images.
The command format is:
dasdcat -i ckdfile [sf=shadow-file-name] dsname1 dsname2 ... -i ckdfile2 dsname10 ...
where ckdfile is the name of a Unix file containing a CKD volume, shadow-file-name (optional) is the name of the associated shadow file, and dsname can be a plain (non-partitioned) dataset name (which is currently not handled) or of the form pdsname/memname where memname can be:
% dasdcat -i mvtres.350 sf= mvtres_1.350 'sys1.parmlib/?' ieabld00 ieaige00 ieaigg00 ieaigg01 iearsv00 ikjprm00 lnklst00 presres smfdeflt % dasdcat -i mvtres.350 sys1.parmlib/smfdeflt:c OPT=2, SYSTEM,JOB AND STEP DATA COLLECTION EXT=YES, USER EXITS ARE TO BE TAKEN JWT=15, MAXIMUM CONTINUOUS WAIT TIME IS 15 MINS.PER STEP BUF=400, A MINIMUM 400 BYTE BUFFER IS DEFINED SID=6A, SYSTEM ID IS 6A MDL=65, MODEL IS MOD 65 OPI=YES, PERMIT OPERATOR INTERVENTION MAN=ALL, RECORD USER AND SYSTEM RECORDS PRM=(,282,NL) SYS1.MAN ALLOCATED TO NON-LABELED TAPE % dasdcat -i mvtres.350 sys1.help/\*:c > Member ACCOUNT | )S SUBCOMMANDS - | ADD/A,CHANGE/C,DELETE/D,LIST/L,LISTIDS/LISTI,HELP/H,END | )F FUNCTION - | THE ACCOUNT COMMAND PROCESSOR INVOKES THE CONVERSATIONAL PROGRAMS ... > Member ALLOC | )F FUNCTION - | THE ALLOCATE COMMAND DYNAMICALLY DEFINES AND ALLOCATES A DATA SET | WITH OR WITHOUT AN ATTRIBUTE LIST OF DCB PARAMETERS | )X SYNTAX - | ALLOCATE DATASET('DSNAME'/*) FILE('DDNAME') ...
DASDPDSU is a command which unloads PDS members from a disk image and copies each member to a file memname.mac in the current working directory.
The command format is:
dasdpdsu ckdfile [sf=shadow-file-name] pdsname [ascii]
where ckdfile is the name of a Unix file containing a CKD
volume, shadow-file-name (optional) is the name of the associated
shadow file, and pdsname is the name of a PDS on that volume.
If the optional ascii keyword is specified, the members will be
unloaded as ASCII variable length text files. Otherwise the members
are unloaded as fixed length EBCDIC binary files.
If you have a question about Hercules, see the Hercules Frequently-Asked Questions page.
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