Re: How to determine tape dataset blksize
Thank you all for your kind help. Regards Victor -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: How to determine tape dataset blksize
Victor, RMM always records a blksize. You can see the value in the LISTDATASET output/display. The value might be zero as mentioned by Radoslaw. Since the system provided support for large blocks (LBI) and the application correctly exploits it, rmm records all values. For older data sets, the rmm extract process will convert zero values to 64K and recalculate data set size and volume usage. So a report from the extract would provide the corrected values. Mike Wood rmm expert -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: How to determine tape dataset blksize
W dniu 2013-07-16 10:39, Victor Zhang pisze: Hello all, I am using RMM as tape management software, and how can I determine tape data set blksize, is blksize recorded by RMM correct? It depends. For IEBGENR, IDCAMS, etc. outputs the RMM information is correct. However older versions of ADRDSSU (and HSM backups) did use "illegal" blocksizes, that means >32760. For 3490E tape it was 64kB, but at the time (pre OS/390 2.10) system did not support it. SO the blocksize in the dataset labels and RMM info was set to zero. Now, AFAIK ADRDSSU use "legal" blocksize and it is recorded in both labels and RMM. BTW: the blocksize seen from system perspective (even this "illegal", low level) is or can be fake. Tape controller can put the blocks together and write mega-blocks. Don't forget about compression being done. BTW: similar situation exist in Gigabit Ethernet: standard etherenet frames are grouped in larger frames, but it's transparent to the software. HTH -- 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. Jeżeli otrzymałeś tę wiadomość omyłkowo, prosimy niezwłocznie zawiadomić nadawcę wysyłając odpowiedź oraz trwale usunąć tę wiadomość włączając w to wszelkie jej kopie wydrukowane lub zapisane na dysku. This e-mail may contain legally privileged information of the Bank and is intended solely for business use of the addressee. This e-mail may only be received by the addressee and may not be disclosed to any third parties. If you are not the intended addressee of this e-mail or the employee authorised to forward it to the addressee, be advised that any dissemination, copying, distribution or any other similar activity is legally prohibited and may be punishable. If you received this e-mail by mistake please advise the sender immediately by using the reply facility in your e-mail software and delete permanently this e-mail including any copies of it either printed or saved to hard drive. BRE Bank SA, 00-950 Warszawa, ul. Senatorska 18, tel. +48 (22) 829 00 00, fax +48 (22) 829 00 33, www.brebank.pl, e-mail: i...@brebank.pl Sąd Rejonowy dla m. st. Warszawy XII Wydział Gospodarczy Krajowego Rejestru Sądowego, nr rejestru przedsiębiorców KRS 025237, NIP: 526-021-50-88. Według stanu na dzień 01.01.2013 r. kapitał zakładowy BRE Banku SA (w całości wpłacony) wynosi 168.555.904 złotych. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: How to determine tape dataset blksize
I've always used DITTO when I needed to know block sizes on tape or DASD. On Tue, Jul 16, 2013 at 8:48 AM, Staller, Allan wrote: > AFAIK, the dataset blocksize recorded in RMM is the *LOGICAL* blocksize of > the dataset. It may or may not bear any relationship to the *PHYSICAL* > blocksize used on the tape. > Modern controllers "do their thing" and just tell MVS what it needs to > know. > > I am sure Mike Wood or others will chime in if the above is incorrect, > > HTH, > > > I am using RMM as tape management software, and how can I determine tape > data set blksize, is blksize recorded by RMM correct? > > > -- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > -- The postings on this site are my own and don’t necessarily represent Mainline’s positions or opinions Mark D Pace Senior Systems Engineer Mainline Information Systems -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: How to determine tape dataset blksize
AFAIK, the dataset blocksize recorded in RMM is the *LOGICAL* blocksize of the dataset. It may or may not bear any relationship to the *PHYSICAL* blocksize used on the tape. Modern controllers "do their thing" and just tell MVS what it needs to know. I am sure Mike Wood or others will chime in if the above is incorrect, HTH, I am using RMM as tape management software, and how can I determine tape data set blksize, is blksize recorded by RMM correct? -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
How to determine tape dataset blksize
Hello all, I am using RMM as tape management software, and how can I determine tape data set blksize, is blksize recorded by RMM correct? Regards Victor -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
