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 Storage
1. 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 list
Backup 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 <WWPN> -dir 3d -p 0 add devs 5B2
# symmask -wwn <WWPN> -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
# 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 the specified 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 : 000287461234
Originator Port wwn : 10000000c9693d53
User-generated Name : HOSTNAME01/10000000c9693d53
Sym Dev LUN
Name Dir:P Physical Device Name VBUS TID SYMM HOST Attr Cap(MB)
------ ----- ----------------------- ---- --- ---- ---- ---- -------
05B2 3d:0 Not Visible 0 0 1 N/A (M) 20478
14d:0 Not Visible 0 0 1 N/A (M) 20478
2. Remove the LUN masking configuration
# symmask -wwn <WWPN> -dir 3d -p 0 remove devs 5B2
# symmask -wwn <WWPN> -dir 14d -p 0 remove devs 5B2
Note: the wwn are the WWPN's of the host HBA's which you obtain from the server. 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
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