Need Help with setting up new disks for Disk Mirror
I have 16 new LUN Disk (EMC Box) and I want to mirror to two existing Volume Groups on the HP Disk Drive. See below Volume Groups and current existing file systems I want to mirror. Listed by each file group is the the amount of new (EMC) Disks I want to assign to each each new disk mirroring file system on the EMC box:
1. vgarray0 Vol Group is Internal HP Disk /db01 - 1 Lun Disk /db03 - 1 Lun Disk /db04 - 1 Lun Disk /db05 - 1 Lun Disk /db06 - 2 Lun Disk /db07 - 4 Lun Disk /db08 - 1 Lun Disk
2. VG01 volume groups is "HAS" Storage via SCSI /db02 - 5 Lun Disk -------- 16 Lun Disk
Do I just go into SAM and assign the 16 disks, which I know how to do. But I am not sure how to copy the from the internal Disk and the HAS (SCSI) Storage to the new EMC Box.
Hi, Mirror/UX allows you to mirror Logical Volumes to a spare place in the <> Volume Group. So if you want to mirror to the other disk, you will need to put them in the same Volume Group. regards, Thierry Poels.
All unix flavours are exactly the same . . . . . . . . . . for end users anyway.
MirrorDisk/UX mirrors logical volumes within a volume group.
If you wish to establish the mirror arrangement at commandline, this is easily done. An simple, excellent guide can be found in the HP-UX System Administration Tasks manual:
This guide discusses both SAM and commandline setups. The data is actually copied to a mirrored volume as a part of the mirror setup process ('lvextend -m').
here is part of my vgdisplay -v vg00 to give you an idea of the way the disk are added to the same vg, notice the the space on the MIRROR group is allocated along with the INTERNAL group, but the BCV group is not, I have a job set the syncs up the mirrors and then splits them nightly.
LV Size (Mbytes) 1200 Current LE 300 Allocated PE 600 Used PV 3
LV Name /dev/vg00/lvol6 LV Status available/syncd LV Size (Mbytes) 800 Current LE 200 Allocated PE 400 Used PV 2
--- Physical volumes --- PV Name /dev/dsk/c4t5d0 PV Status available Total PE 1023 Free PE 0 Autoswitch On
PV Name /dev/dsk/c4t6d0 PV Status available Total PE 1023 Free PE 0 Autoswitch On
PV Name /dev/dsk/c1t0d0 PV Status available Total PE 2170 Free PE 124 Autoswitch On
PV Name /dev/dsk/c1t1d0 PV Status available Total PE 2170 Free PE 2170 Autoswitch On
--- Physical volume groups --- PVG Name INTERNAL PV Name /dev/dsk/c4t5d0 PV Name /dev/dsk/c4t6d0
PVG Name MIRROR PV Name /dev/dsk/c1t0d0
PVG Name BCV PV Name /dev/dsk/c1t1d0
hope this helps some, the links provided will help with setting something simular, if not ask.
This does not answer your question, but may be of some use.
Why are you trying to mirror disks on an EMC? EMC (as far as my experience has been) always do internal mirroring (or RAID5). That's one of the reasons why they cost so much!
I'd make sure you disks are not mirrored before doing LVM mirroring.
o If they are not mirrored then what James said is probably what you want. o If they are mirrored remember to turn off bad block allocation on EACH LV on the EMC. # lvchange -r N /dev//.
And my new EMC Box only has 4G LUN Disks available. I need to mirror VG01 and vgarray0 to my EMC Box with 4G LUN Disks I have tons of 4G LUN Disk availabe.
I thought you had to setup for disk mirroring with the exact same size of LUN Disk.
Can you mix and match and if so how? What are the rules?
Hi again, as I mentioned before Mirror/UX will mirror Logical Volumes in a Volume Group, it does not mirror disks. So if you want to mirror a Logical Volume the mirror copy will be placed somewhere (you have some control over the 'somewhere') in the Volume Group just like you would create a new logical volume. In other words the mirror might be completely on one disk, or might be spread over several disks; and if you have one logical volume sized 9GB on a 9GB disk it might/can be mirror to whatever combination of other disks. regards, Thierry.
All unix flavours are exactly the same . . . . . . . . . . for end users anyway.
