What are the column headers for that table? Is there a table with a column labeled KL+DL? Kl=range DL Bytes (Max)?
It should look something like the tables in Appendix A of <http://bitsavers.org/pdf/ibm/dasd/3380/GA26-1664-1_3380_IBM_3380_Direct_Access_Storage_Description_and_Users_Guide_Dec81.pdf>, but with different numbers. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List <[email protected]> on behalf of R.S. <[email protected]> Sent: Thursday, February 15, 2018 8:03 AM To: [email protected] Subject: Re: CKD #2 - KEY W dniu 2018-02-14 o 17:12, Seymour J Metz pisze: > Yes, you can allocate a nonVSAM file with a key area; why would you want to? For learning purposes. I have never done that. And in fact I'm not sure wether I still can. I tried with DSORG=PS and DA, and it seems everytime I get regular dataset (that means dataset with no keys). > If you are reading key and data then the block size includes both. Let's assume I have DA or PS file with keys and I want to copy it using IEBGENER. Will the keys be copied? > Which table? /B.1.3 /*Using the 3390 Track Capacity Tables (With Keys) * For example, table for KEY=255. Record size 22, 45 records fit on the track. Table says the utilization is 1.7% Indeed, 22*45=990, and 990 is approx 0,017* 56664. Key is not considered. When we treat KEY as usable data: (22+255)*45=12465, that's approx 21% of 3390 track. Regards -- Radoslaw Skorupka Lodz, Poland > > -- > Shmuel (Seymour J.) Metz > http://mason.gmu.edu/~smetz3 > > ________________________________________ > From: IBM Mainframe Discussion List <[email protected]> on behalf of > R.S. <[email protected]> > Sent: Wednesday, February 14, 2018 10:47 AM > To: [email protected] > Subject: CKD #2 - KEY > > (further questions about CKD on DASD and related topics) > > 1. KEY > Nowadays there are two "datasets" using hardware key: VTOC and PDS > directory. > What about other files? Is it possible to allocate new dataset with > hardware key? > According to JCL Reference, KEYLEN keyword can be used for VSAM KSDS or > for non-SMS datasets including BDAM, SAM, BPAM, QISAM (!) and EXCP > datasets. > Is it still supported or just documentation is out of date? > > 2. How can I recognize the key exist? Will ISPF Dataset Info show such > information? > File Manager? Other tools? > > 3. LRECL and the kye > Typical physical user record on 3390 track consist of Count field and > Data - the content of the block. Assuming RECFM=F we have physical > record=logical record (Count ignored). That's clear. > What about record with the key? Is it > DATA=logical record OR > KEY+DATA=logical record? > > As far as I know, the PDS directory consist of 256-byte blocks, but the > 8-byte key is not part of the block. Is it correct? > Or maybe it is 256 bytes including some 8-byte field which is repeated > in Key area? > > 4. Space utilization > 3390 documentation provide track capacity tables, one column is "Percent > Space Used". It seems for, they consider only DATA field as usable data, > the KEY is considered as not usable (liek Count or R0, or gaps). > Of course it is only the table, but shouldn't key be included? > > > Regards > -- > Radoslaw Skorupka > Lodz, Poland > > > > > ====================================================================== > > > -- > Treść tej wiadomości może zawierać informacje prawnie chronione Banku > przeznaczone wyłącznie do użytku służbowego adresata. Odbiorcą może być > jedynie jej adresat z wyłączeniem dostępu osób trzecich. Jeżeli nie jesteś > adresatem niniejszej wiadomości lub pracownikiem upoważnionym do jej > przekazania adresatowi, informujemy, że jej rozpowszechnianie, kopiowanie, > rozprowadzanie lub inne działanie o podobnym charakterze jest prawnie > zabronione i może być karalne. 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