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тАО03-21-2011 03:02 AM
тАО03-21-2011 03:02 AM
A query on root disk mirroring in any version 11iv1/v2/v3.
If my primary disk goes down due to any reason, is server reboot/hung or it keep working from the secondary disk?..
Regards
Jimbe....
Solved! Go to Solution.
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тАО03-21-2011 04:25 AM
тАО03-21-2011 04:25 AM
SolutionBill Hassell, sysadmin
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тАО03-21-2011 05:12 AM
тАО03-21-2011 05:12 AM
Re: General query on root disk mirroring....
But in case of a reboot you need to boot in quorum mode because of the missing disk.
Hope this helps!
Regards
Torsten.
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тАО03-21-2011 06:03 AM
тАО03-21-2011 06:03 AM
Re: General query on root disk mirroring....
boot vmunix -lq
hpux -lq
depending on whether it is PA or IA.
if you boot vg00 without quorum your system should keep on running as long as all of the LVs are still available from one of the mirrors.
IF the disk comes back it should sync up automatically.
it should be the same if you use VxVM for your boot disk. BASE VxVM allows you to mirror the boot disk free.
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тАО03-21-2011 08:27 AM
тАО03-21-2011 08:27 AM
Re: General query on root disk mirroring....
Please ensure that autoboot/autosearch capabilities are ON/enabled status.
#setboot
Primary bootpath : 8/4.5.0
Alternate bootpath : 8/16/5.0.0
Autoboot is ON (disabled)
Autosearch is ON (disabled)
To enable autoboot:
#setboot -b on
To enable autosearch:
#setboot -s on
#setboot
Primary bootpath : 8/4.5.0
Alternate bootpath : 8/16/5.0.0
Autoboot is ON (enabled)
Autosearch is ON (enabled)
Also ensure that secondary system loader (SSL) utility load "hpux -lq" (man hpux) to boot the system with quorum override option. This option is used in a scenario where a disk is removed from the system or is otherwise unavailable, but the corresponding entry for the physical volume has not yet been removed from the volume group using vgreduce.
#mkboot -a "hpux -lq" /dev/rdsk/c[n]t[n]d[n]
-a option creates an autoexecute file AUTO on device, if none exists. mkboot deposits auto_file_string in that file. If this string contains spaces, it must be quoted so that it is a single parameter.
#man mkboot
Please keep in mind that "-lq" flag is supported by LVM layouts only.
Rgds.
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тАО03-21-2011 09:29 AM
тАО03-21-2011 09:29 AM
Re: General query on root disk mirroring....
It should keep working if your mirroring is proper. Then what is the use of mirroring if goes to reboot.
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00872150&cc=us&dlc=en&lc=en&jumpid=reg_R1002_USEN
Rgds...
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тАО03-21-2011 09:32 PM
тАО03-21-2011 09:32 PM