rmsf doesn't work fine?

[Mauro Gatti]

Hi all, I've got a K class with HP-UX 10.20
I removed some volumes located on a Symmetrix storage from my k class. So I tried to remove associated special file doing

rmsf -H

Next I did an "ioscan" and again an "ioscun -funC disk" and I see for any sf removed a row like:
disk 63 10/16/4.1.4 disc3 NO_HW DEVICE EMC SYMMETRIX

Why didn't rmsf delete system definition for these volumes?

Thank You

[Robert-Jan Goossens]

Hi Mauro,

rmsf removes the file not the hardware, ioscan is an active scan, the command scans all the devices for any hardware. Removing the file will not prevent ioscan to see the harware.

Hope this helps,
Robert-Jan

[T G Manikandan · Accepted solution]

rmsf will only remove the device files associated with the hardware.

To take off those entries the server will require a reboot.
Only a reboot will clear the NO_HW messages.

[Mauro Gatti]

I know but I unmapped these volumes from SCSI interfaces where my server is linked to symmetrix.
Symmetrix reports these volumes as "unmapped" so my server shouldn't see them!

[Fabio Ettore]

Ciao Mauro,

what do you mean for 'volumes'?
If you mean disks then you should shutdown server and remove physical devices. After boot you should not see the disks by ioscan (of course you won't see device files too).
Have I understood well?

Best regards,
Ettore

[Mauro Gatti]

Ok Manikandam, I'll try as soon as possible.
Do you know if this behavior there is also on HP-UX 11.11?

[Fabio Ettore]

Sorry, while I am posting you have posted too.
If volumes are 'unmapped' on symmetrix then problem is not on HP-UX systems. It sees fine disks by ioscan and rmsf doesn't solve your problem.
Have you heard Symmetrix about that message?

Ettore

[T G Manikandan]

I do not see a change in 11.11

[Mauro Gatti]

Ciao Ettore,
I think so; You understood well :-)
"volumes" are disks.
I remembered on HP-UX 11.11 there was an "online" refreshing of volumes status after a "rmsf"... So I belived 10.20 does the same thing.

It is possible I have bad memory :-)

[Mauro Gatti]

Strange... on another 10.20 server (second cluster node)these entries was deleted completely.
Maybe does service guard create any interference?

[Fabio Ettore]

I agree with you....strange case.
I don't understand how to rmsf could delete completely a disk reference on an HP-UX 10.20 system.
Anyway I don't think that something changed for 11.11. Then I think, of course if these 'unmapped' disks are shared between two systems then could be involved Service Guard. But I don't work on Symmetrix disks and don't understand what's going on these 'unmapped' messages'. Mauro, a question:
were these disks NO_HW before or after rmsf command?
If they were NO_HW before of rmsf command too then I would suggest you to open an hardware call. Probably there are hardware problems on those disks and then were seen 'unmapped' from Symmetrix.
Otherwise if they were NO_HW after rmsf command then you should reboot system to clean them.

I hope this helps you.

Best regards,
Ettore

[Gerhard Roets]

You can try the following

Ok firstly some theory
ioscan -fu........ inspects the "usable" config refer to the ioscan man page.

So try to do a "ioscan -fn" and then an ioscan -fun and the output might change from the one to the next.

My 10c worth maybe you are just looking at some cached config which has gone a astray.

Regards
Gerhard