From: Chandra babu (jmc_babu@rediffmail.com)
Date: Thu Feb 27 2003 - 05:54:32 EST
Hello Managers,
We have two Alpha4100 servers on a Trucluster ver 1.6 environment with four RA3000 Raid boxes, out of which two are base pedestal modules with HSZ22 controller and remaining two are expansion modules without controllers. The operating system running on these systems is Tru64 ver 4.0F.
In srm console (>>>) we have eight devices dkc0 to dkc7 along with controller jkc607 (Raid box 1 means one base module and one expansion module). Similarly we have eight devices along with jke607 controller - dke0 to dke7 of Raid box 2, means one base module and one expansion module.
Correspondingly in OS level we have devices - rz128c, rzb128c …rzh128c for dkc* devices and rz144c,rzb144c … rzh144c for dke* devices.
We have two empty slots in each of the two base modules, where we have plan to put the new 36GB disks and our intention is to copy the existing data of 4.3GB disks into new disks. This can be done only when you are adding a new mirrored volume of 36GB to an existing domain and try to remove the old mirrored volume of 4.3GB, the data will migrate from old volume to new volume.
Tentative Procedure to upgrade the 4.3GB disks in Raid1 and Raid2:
Assume that the mirrored 4.3GB disks to be replaced are dkc4 (rze128c) and dke4 (rze144c). Assume that the new device created due to the 36GB disks will be dkc8 (rzi128c) and dke8 (rzi144c)
1. Physically insert the disks (36GB) in the empty slots - one each in Raid box 1 and Raid box 2
2. Using command console in the PC, create the virtual disk
3. Write disklabel for the new disks in the system
4. Add disk to the diskgroup (say oadg) using voldiskadd
5. Using dxlsm create subdisk (say oadg05, because already 4 devices are there in this diskgroup out of which two are 4.3GB disks which we are going to replace) of device rzi128c.
6. Create plex (say p7pl-01) for that subdisk
7. Then create volume (say p7vol)
8. Similarly create another subdisk (say oadg06) of device rzi144c
9. Create plex (say p7pl-02) for the subdisk
10. Drag and drop plex p7pl-02 into volume p7vol, thus a new volume is created.
11. Add new volume p7vol to existing domain (say test_domain) using addvol command.
12. #addvol /dev/vol/oadg/p7vol test_domain
13. Remove the old volume "testvol" using rmvol command
14. #rmvol /dev/vol/oadg/testvol test_domain (After executing this command you can see the data migration from testvol to p7vol)
15. In dxlsm the removed volume must be out of plex. Now remove plex, subdisk and remove disks physically.
Hope the above procedure is right or pls let me know if Iam wrong. Waiting for ur mails or suggestion.
Thanx in advance
Chandra babu
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