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тАО08-04-2001 10:29 AM
тАО08-04-2001 10:29 AM
Business Copy and Veritas Volume Mgr
Using business copy we have a pvol and svol (primary and secondary volume) when the pair are split we need to mount the svol onto the SAME host as the pvol for development work.
Say we have vg01 with 2 disks, 1 the pvol the 2nd the svol. With LVM after the pair is split:
1) mkdir/mknod another volume group vg02
2) run vgchgid on the disk
3) vgimport the svol using /dev/dsk/c?t?d?
4) avtivate the vg
5) mount the lvols and fsck the filesystems
This works fine.
With volume manager once the pair is split:
1)Tried using:
vxdg -tC -n diskgroup-temp import diskgroup
There are 2 key problems with volume manager the first is that no disk device argument can be given to the import command above and there is no vgchgid equivalent to change the unique disk group number in the private area (at least that I'm aware of).
Does anybody have any ideas how we can get round this?
Thanks, Paul
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тАО08-06-2001 06:02 AM
тАО08-06-2001 06:02 AM
Re: Business Copy and Veritas Volume Mgr
1. Create a snapshot mirror for a volume with this command:
vxassist snapstart volume_name
Once the snapshot mirror is synchronized, it continues being updated until it is detached. If the snapshot procedure is interrupted, the snapshot mirror is automatically removed when the volume is started.
2. When the snapstart step is complete and the mirror is in a SNAPDONE state, choose a convenient time to complete the snapshot task. Inform users of the upcoming snapshot and ask them to save files and refrain from using the system briefly during that time.
3. Create a snapshot volume that reflects the original volume with this command:
vxassist snapshot volume_name temp_volume_name
This breaks the snapshot mirror and attaches it to the new temp_volume_name.
4. Use fsck (or some utility appropriate for the application running on the volume) to clean the temporary volume's contents. For example, use this command:
fsck -y /dev/vx/rdsk/temp_volume_name
At this point, there is a new volume and filesystem which may be mounted on a temporary mount point.
5. Unmount the FS and remove the new volume if you try to take another snapshot and use the same temp_vol.
vxedit -rf rm temp_volume_name
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тАО08-07-2001 12:17 AM
тАО08-07-2001 12:17 AM
Re: Business Copy and Veritas Volume Mgr
Thanks for your reply. But Business Copy represents a significant software investment and ensures that all the mirroring is handled at the array end regardless of what hosts are attaching to it and their o/s.
The issue I have is with veritas volume manager 3.11 not allowing me to mount an identical bit4bit copy of the original volume onto the same server, due to the vol mgr identification data being the same in the private regions of the original and the copy. LVM allows you to change this with vgchgid and also to import a specific target disk as oppposed to a disk group.
Thanks anyway, Paul
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тАО10-16-2001 12:08 PM
тАО10-16-2001 12:08 PM
Re: Business Copy and Veritas Volume Mgr
Try vxprivutil -help to get the options and do a quick search on google for "vxprivutil" to find a Sun blueprint that may be helpful.
I am very curious to find out your vxvm experiences with the XP.
Keith
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тАО08-23-2002 03:12 AM
тАО08-23-2002 03:12 AM
Re: Business Copy and Veritas Volume Mgr
We never got it to work. Had to end up using a separate Solaris box to achieve it.
Cheers Anyway, Paul
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тАО08-23-2002 03:47 AM
тАО08-23-2002 03:47 AM
Re: Business Copy and Veritas Volume Mgr
Almost in this guide it not appear