Thanks Bruce, worth a try Crispin Hugo Systems Programmer, Macro 4 <http://www.macro4.com/> Macro 4 plc, The Orangery, Turners Hill Road, Worth, Crawley, RH10 4SS Direct Line: +44 (0)1293 872121 Switchboard: +44 (0) 1293 872000 Fax: +44 (0) 1293 872001 This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept liability for any errors or omissions in the contents of this message which arise as a result of e-mail transmission. If verification is required please request a hard-copy version. This message is provided for informational purposes and should not be construed as a solicitation, offer or acceptance of any offer.
-----Original Message----- From: Bruce Black [mailto:[EMAIL PROTECTED] Sent: 03 November 2005 21:05 To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Sharing z/OS DASD under VM > > >Oh, I'm not too sure how well z/OS will tolerate a "read only" disk. I >remember doing it long ago with MVS 3.8j and VM/370. I'd get some >strange I/O errors at times. > Even when you open a dataset for just INPUT, OPEN may want to rewrite the F1 DSCB to update the last reference date if is not already set to today. This will fail if the disk is read/only. However, IBMLINK finds some APARS from 1982 (OZ56722, OZ60158, OZ63205) which modified O/C/E to be tolerant of a "write inhibit" error on the DSCB if opening the dataset for INPUT. The APARs mention VM but us oldtimers remember that 3330s and 3350s had a switch to put the disk into read/only mode. Unless IBM has regressed those changes in the last 20 years, VM volumes in R/O mode should work. -- Bruce A. Black Senior Software Developer for FDR Innovation Data Processing 973-890-7300 personal: [EMAIL PROTECTED] sales info: [EMAIL PROTECTED] tech support: [EMAIL PROTECTED] web: www.innovationdp.fdr.com ---------------------------------------------------------------------- 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 ________________________________________________________________________ This email has been scanned for all known viruses by the MessageLabs Email Security Service and the Macro 4 plc internal virus protection system. ________________________________________________________________________ ________________________________________________________________________ This email has been scanned for all known viruses by the MessageLabs Email Security Service and the Macro 4 plc internal virus protection system. ________________________________________________________________________ ---------------------------------------------------------------------- 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
