Why did the system go into a wait state? Was a standalone dump taken? When we process a DIAGxx that specifies MVS(LAST), we copy CVTSYSAD into DgnbAIMvsUCBAddr (in SYS1.MODGEN(IGVDGNB)). When we try to AutoIPL that MVS, we get the device number from UCBCHAN in the UCB pointed to by DgnbAIMvsUCBAddr. So a storage overlay of DgnbAIMvsUCBAddr or of UCBCHAN would result in a wrong device number being used for AutoIPL.
Jim Mulder z/OS Diagnosis, Design, Development, Test IBM Corp. Poughkeepsie NY "IBM Mainframe Discussion List" <[email protected]> wrote on 11/04/2021 08:42:46 PM: > From: "Mark Jacobs" <[email protected]> > To: [email protected] > Date: 11/04/2021 11:38 PM > Subject: AutoIPL Failure, just curious > Sent by: "IBM Mainframe Discussion List" <[email protected]> > > One of out systems went into a wait state today and autoipl was > attempted. It failed with this message (from the HMC Hardware Events log) > > A load failure occurred on logical partition XXXX because a device > address control block (DACB) was not found. Unit address = 5810. > > That unit address is not in our IODF. A manual activation was needed > to bring it back up. I'm just curious how/why this error occurred. > > Mark Jacobs ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
