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EMC Symmetrix SAN Storage Provisioning

EMC Symmetrix SAN Storage Provisioning Allocating, Unallocating

This page details on how to add/remove and zone additional storage from EMC Symmetrix.Basically, if you are working on EMC Symmetrix DMX series, you have to understand the 17 rules of the FA (Front Adapter), understand the load balance on how much you had currently utilized on the Storage FA assignment.Adding Storage1. Lists all the external locks held in Symmetrix array 1234. # symcfg -sid 1234 list -lockn all

2. List all the available devices (hypers) on the EMC Symmetrix # symdev -noport listBackup the VCM database # symmaskdb backup

3. Create a Meta volume # cat metafile.cmd form meta from dev 5B2 config=striped, stripe_size = 2 cyl; add dev 5B3:5B6 to meta 5B2;

4. preview, prepare and commit the changes # symconfigure -f metafile.cmd preview -nop # symconfigure -f metafile.cmd prepare -nop # symconfigure -f metafile.cmd commit -nop Check the configuration # symdev show 5B2

Note: -nop known as no prompt, which will execute the command without asking Yes / No

5. Map meta volume to front-end directors # cat mapfile.cmd map dev 5B2 to dir 3d:0 target=0, lun=5;

map dev 5B2 to dir 14d:0 target=0, lun=5;

6. Show the device detail # symdev -sid 1234 show 5B2 |more

7. preview, prepare and commit the changes # symconfigure -f mapfile.cmd preview -nop # symconfigure -f mapfile.cmd prepare -nop # symconfigure -f mapfile.cmd commit -nop Check the configuration # symdev -sa 3d -p 0 -fibre list # symdev -sa 14d -p 0 -fibre list

8. Mask the meta volume # symmask -wwn -dir 3d -p 0 add devs 5B2 # symmask -wwn -dir 14d -p 0 add devs 5B2

Note: the wwn are the WWPN's of the host HBA's which you obtain from the server.

9. update the VCM database

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# symmask sid 1234 refresh -nop

10. Display the device assignment by FA. # symmaskdb -sid 1234 list assignment dev 5B2 Note: You should see this message if your device is newly create and yet allocate to the host. "No device masking database records could be found for thespecified input parameters"

11. Display the device detail in WWN # symmaskdb -sid 1234 list devs -wwn 10000000c9693d53

12. To rename the wwn of the host to HOSTNAME/PORTNUMBER # symmask -sid 1234 -wwn 10000000c9693d53 rename HOSTNAME01/HBA0

13. To list out the overall capacity of the host # symmaskdb -sid 1234 list capacity host HOSTNAME01

Removing Storage

1. Display the devices by the HOST WWN # symmaskdb -sid 1195 list devs -wwn 10000000c9693d53

Symmetrix ID : 000287461234Originator Port wwn : 10000000c9693d53

User-generated Name : HOSTNAME01/10000000c9693d53

Sym Dev LUNName Dir:P Physical Device Name VBUS TID SYMM HOST Attr Cap(MB)------ ----- ----------------------- ---- --- ---- ---- ---- -------05B2 3d:0 Not Visible 0 01 N/A (M) 20478

14d:0 Not Visible 00 1 N/A (M) 20478

2. Remove the LUN masking configuration # symmask -wwn -dir 3d -p 0 remove devs 5B2 # symmask -wwn -dir 14d -p 0 remove devs 5B2

Note: the wwn are the WWPN's of the host HBA's which you obtain from theserver. Update the VCM database # symmask refresh nop

3. offline the volume 5B2 # symdev -sid 056 not_ready 5B2 -nop

Check the configuration # symdev show 5B2

4. Unmap the meta volume from Front-end directors # cat unmapfile.cmd

unmap dev 5B2 from dir 3d:0; unmap dev 5B2 from dir 14d:0;

5. Remove the volume from the VCM database # symconfigure -f unmapfile.cmd preview -nop # symconfigure -f unmapfile.cmd prepare -nop # symconfigure -f unmapfile.cmd commit -nop Check the configuration # symdev -sa 3d -p 0 -fibre list # symdev -sa 14d -p 0 -fibre list