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тАО08-09-2001 10:27 AM
тАО08-09-2001 10:27 AM
Mirror Disk Help
Hi,
I would like to know how to add the mirror for root drive that I don't have at all.
Any card, action etc. do I need to prepare?
Appreciated.
Steven
I would like to know how to add the mirror for root drive that I don't have at all.
Any card, action etc. do I need to prepare?
Appreciated.
Steven
Steve
3 REPLIES 3
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тАО08-09-2001 01:16 PM
тАО08-09-2001 01:16 PM
Re: Mirror Disk Help
Hi Steven,
Since you don't mention your hardware, I'll speak in general terms. To do this correctly,
you need to protect your self from more than simply a disk failure. You need to be able to tolerate a controller failure or a cable failure (or accidental disconnection) as well.
I'll use a D-3xx box with internal hot-plug drives as an example. Let's say you are booting from a 4GB disk on the internal HVD SCSI drive. To mirror correctly, you need to
have an external drive enclosure (e.g. a Jamaica), a second HVD SCSI controller, a second (ideally) identical 4GB drive, cables, and terminator(s). You of course also must install the Mirror/UX software.
This fully protects and mirrors your data.
If possible, avoid internal disks which are not
hot-pluggable. For example, none of my K-box use internal drives instead I boot from external drives - this way I can replace a drive without shutting down the box.
You can, of course, simply put in a second drive (with a different SCSI ID) on your current bus but that only protects from a drive failure.
Once the hardware is configured, the actual mirroring is simple.
Regards, Clay
Since you don't mention your hardware, I'll speak in general terms. To do this correctly,
you need to protect your self from more than simply a disk failure. You need to be able to tolerate a controller failure or a cable failure (or accidental disconnection) as well.
I'll use a D-3xx box with internal hot-plug drives as an example. Let's say you are booting from a 4GB disk on the internal HVD SCSI drive. To mirror correctly, you need to
have an external drive enclosure (e.g. a Jamaica), a second HVD SCSI controller, a second (ideally) identical 4GB drive, cables, and terminator(s). You of course also must install the Mirror/UX software.
This fully protects and mirrors your data.
If possible, avoid internal disks which are not
hot-pluggable. For example, none of my K-box use internal drives instead I boot from external drives - this way I can replace a drive without shutting down the box.
You can, of course, simply put in a second drive (with a different SCSI ID) on your current bus but that only protects from a drive failure.
Once the hardware is configured, the actual mirroring is simple.
Regards, Clay
If it ain't broke, I can fix that.
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тАО08-09-2001 03:58 PM
тАО08-09-2001 03:58 PM
Re: Mirror Disk Help
Hi Steven,
Clay's suggestion in addressing the hardware
issues are perfect.
I have a script here slightly different with
a little less typing to do the logical volume
mirroring.
# pvcreate -f -B /dev/rdsk/cXtXdX
# vgextend /dev/vg00 /dev/rdsk/cXtXdX
# mkboot /dev/rdsk/cXtXdX
# mkboot -a "hpux -lq(;0)/stand/vmunix" /dev/rdsk/cXtXdX
# lvlnboot -R
# for LVOL in /dev/vg00/lv*
> do
> echo $LVOL
> lvextend -m 1 $LVOL
> done
#
One other suggestion is to do a make_recovery tape on completion. This will ensure that you have an operating system of your system on a bootable tape.
we use this procedure.
# make_tape_recovery -x inc_entire=vg00 -I -v -a /dev/rmt/0mn
(assuming /dev/rmt/0m is you DDS tape drive)
HTH
-Michael
Anyone for a Mutiny ?
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тАО08-11-2001 04:36 PM
тАО08-11-2001 04:36 PM
Re: Mirror Disk Help
Hi Steven,
You might want look at chapter 7 in http://docs.hp.com/hpux/pdf/B2355-90672.pdf
or
http://docs.hp.com/hpux/online/00/00/67-con.html
You will get more information about guidelines for setting/managing LVM mirrors.
-HTH
I am RU
You might want look at chapter 7 in http://docs.hp.com/hpux/pdf/B2355-90672.pdf
or
http://docs.hp.com/hpux/online/00/00/67-con.html
You will get more information about guidelines for setting/managing LVM mirrors.
-HTH
I am RU
They think they know but don't. At least I know I don't know - Socrates
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