As Hewlett-Packard's 3000s age, their disks go bad. It's the fate of any component with moving parts, but it's especially notable now that an emulated 3000 is a reality. The newest HP-built 3000 is at least 11 years old by now. Disks that boot these servers might be newer, but most of them are as old as the computer itself.
A CHARON-based 3000 will have newer drives in it, because it's a modern Intel server with current-day storage devices. However, for the nearly-total majority of the 3000 system managers without a CHARON HPA/3000, the drives in their 3000s are spinning -- ever-quicker -- to that day when they fail to answer the bell.
Even after replacing a faulty 3000 drive — which is not expensive at today's prices — there are a few software steps to perform. And thus, our tale of the failed system (bootup) disk.
Our disk was a MEMBER in MPEXL_SYSTEM_VOLUME_SET. I am trying to delete the disk off the system. Upon startup of the machine is says that LDEV 4 is not available. When going into SYSGEN, then IO, then DDEV 4 it gives me a warning that it is part of the system volume set — cannot be deleted. I have done an INSTALL from tape (because some of the system files were on that device), which worked successfully. How do I get rid of this disk?
Gilles Schipper of GSA said that the INSTALL is something to watch while resetting 3000 system disks.
Sounds like the install did not leave you with only a single MPEXL_SYSTEM_VOLUME_SET disk. Could it be that you have more than one system volume after INSTALL because other, non-LDEV 1 volumes were added with the AVOL command of SYSGEN -- instead of the more traditional way of adding system volumes via the VOLUTIL utility?
You can check as follows:
If the resulting output shows more than one volume, that's the answer.
Schipper offered a repair solution, as well.