All true Pressy, with the following qualifiers:
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in a v240 there is a card which is called the "System Configuration Card" (SCC) where the HOSTID is stored (hostid and nvram settings). you need to put the old card in the new mashine to provide the right HOSTID to your VxVM license.
True, but in that case why not just bring the whole hardware hardware setup? That too would be easier. There may also be licensing issuse here. As a Veritas (and Sun) OEM supplier I know that we cannot do this when installing for external customers.
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in theory you could put in those disk in any order... that'S a feature of VxVM... when the kernel starts a demon (vxconfigd) looks at all attatched disks and reads the privat region on the disk to see which diskgroup and which volume (data in public region) configuration is on the disk [manual command would be: "vxdctl enable"] that's a big different to SDS/LVM because it handles the volumes with local databases (metadb) but VxVM stores the information on each disk. that's the reason for the logical split of the disk into privat and public regions.
In theory yes, in practice with the 3310 you cannot, unless it is a JBOD. In which case it can be done this way. It cannot be done in a cotrolled bases 3310 as a global replacement of disks would require rebuilding of the logical drives, wiping all the information, also insering the disks in any order would not work in the 3310 as the logical drives are configures based on the physical position of the disks in the array.
This is what I use and why I at first didn't consider the JBODs, we only use them as for expansion on controller based 3310s. And the reason I said a direct swap probably wouldn't work.
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the dual way to the disks should be enable afterwards with the veritas DMP. enable it for the disks. (could be done with the "vxdiskadm" cli interface or with the cli command "vxdmpadm") i'm not sure if DMP will work if there are no controllers in the 3310 just a jbot. take a look at the instructions in the "Enabling VERITAS DMP" section of the Sun StorEdge 3000 Family Installation, Operation, and Service Manual on docs.sun.com.
In single bus mode DMP configuration can be done on a JBOD, but since he is using dual bus it's not an option.
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anyway. the idea with the backup should not be ignored for safety reason ;-) but it should work with the normal disk&SCC replacement..
It also give hardware independence, you could happily move from a 3510 to any other array by just adding the drivers.
VirginiaSA, read Pressy's reply in detail, it will work if you are using JBODs with no controller. On the other hand, if you really want to take the physical swap approach, it might be easier just shipping he whole lot to where it's going and swap the two systems.