"R.S." <[email protected]> wrote in message news:<[email protected]>... > W dniu 2011-07-19 16:06, Vernooij, CP - SPLXM pisze: > > And if anybody wonders *why* z/OS does not allow you to do a specific mount of a SCRTCH tape: > > Your SCRTCH tapes will probably have a 'Fast Ready Category' assiged in your VTS. This means, that when you request a tape from such a category, you intend to write new data on it and don't care about the old data on the tape. Therefor, the VTS will not bother recalling the old data, but will immediately assing you a new blank tape in its cache. If you then try to read, you will see an empty tape. Furthermore, this empty tape will now be *the* current instance of this volser, with your old data still available somewhere on the backend cartridges, but unreachable for you. IBM VTS support seems to provide a paid service to recover the old data in such a case. > > There are more reasons, valid in real tape world also. > The tape is considered as scratch, which could mean "we don't need any
> date on the tape" - but it doesn't mean "anyone can READ the tape now". > That's why RMM does not allow to read such tape, even if it's mounted as > non-volume-specific scratch mount. Volume-specific mount could mean > someone wants to overwrite THIS tape. > Usually to read (use) the scratch one must change volume status from > scratch to private (master or user in RMM terms). Obviously this is > controlled i.e. using RACF profiles. > > -- > Radoslaw Skorupka > Lodz, Poland > That is different from CA-1. You only need autority to read the tape, but CA-1 does not prevent you from reading it while it is SCRTCH. Kees. ******************************************************** For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 ******************************************************** ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
