I'm setting up mirroring on five different HP servers (2 Itanium and 3 PA-RISC) this week. The PA-RISC boxes are running HP-UX 11.11 with the latest patches and the Itaniums are on HP-UX 11.23 with the latest patch clusters. This is my first foray into MirrorDisk UX.
I found a handy set of examples as to what to do here and here. After following along with the steps in the script at the first link (I chose to run the commands manually to learn more) it appears that I have successfully installed MirrorDisk and mirrored my root VG (vg00).
Output from lvdisplay for one of the lvols:
And here is output from vgdisplay indicating that all lvols are using 2 PVs:
I rebooted the system and set the PRI and ALT booth paths as instructed at the end of the linked script above. PRI points to the secondary mirror device and ALT points to the primary mirror device (the original system disk). The system boots fine if pointed to PRI and both disks are in the system. If I pull out the original system disk and point at PRI, it still boots fine but complains about not having a dump area (Which I think I can fix, but the link above that points to the HP ITRC forums has one person suggesting that you DON'T mirror dump. Anyone know why?). However, if I pull out the secondary disk (the newly created mirror) and try to boot off of the ALT path which points to the original system disk, the boot is attempted but after some really nasty messages and a failure to activate the root file system a system crash occurs. I think there must be some preparation I must make that I've skipped or maybe I need to change something about the boot string when booting from the original system disk?
So I know I have mirroring but it seems pointless if I can't boot off of each mirror independently of the other (simulating a disk failure). Or am I misunderstanding something about how mirroring is supposed to work in HP-UX?
The crash message:
So, what am I doing wrong? (I assume I must be doing something wrong...)
Hi Friends,
Can any of you explain me about the below line of code?
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Im not able to understand, what exactly it is doing :confused:
Any help would be useful for me.
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