STEPS TO CREATE BCV DEVICES DMX / SYMMETRIX

1       Verify the free space available in MBs

SUN1#symconfigure   -sid  277  list  -freespace –unit MB

• Now the free space in SYMM 277 is displayed in MBs example

1278888 MB

2      Verify any configuration sessions are running

SUN1#symconfigure   -sid  277 verify

• It verifies if any configurations are running

 

3      Verify if any locks have been enforced upon SYM

SUN1#symcfg   -sid  277  list  -lockn

• It displays the lock number if any lock has been enforced locks can be from 0 to 15. (Example : configuration lock =15)

 

4       To release the lock (example 15)

SUN1#syncfg   -sid   277 release -lockn    15

• Lock released

 

5      Now create a text file using vi editor to submit parameters to commit

the unprotected LUN configuration

SUN1#vi  create_BCV

Create  dev count =8 size=958 emulation=fba config=unprotected;

:wq

 

 

• Count denotes number of devices to be created
• Size mentioned in cylinders one cyl = 0.5x MB
• Emulation refers to fba(fixed block architecture 512 bytes)used in open systems.
• Config refers to the protection enforced on device

6     Commit the configuration

SUN1#symconfigure  -sid   277  -v  -f   create_LUN    commit –nop

 

• Configuration is saved and eight LUNs are created
• Phases of this command are preview, prepare and commit
• -v verbose mode
• -f file parameter create_LUN  LUN specifications are enclosed
• Commit: to perform the activity
• -nop: non interactive session and no prompting

7          Discover the sym devices

SUN1#symcfg  discover

• Solution enabler in host sends an API call through HBA to sym
• Gate keeper devices receives the API call
• Downloads the configuration of sym in IMPL.bin file to host
• This configuration is stored in /var/sym_api/db directory of host

8     Scan for new devices IO level at host

SUN1#devfsadm  -Cv

• It verifies for newly added devices and also the new device drivers

 

9        To list the devices

SUN1#symdev  list

• Displays the newly added devices
• The LUN number is given in hexa decimal code (0000 – ffff)
• As the devices are not mapped the directors field displays ???:???
• in our session let us suppose the addresses of 8LUNs are 0009 – 0010
• 0000 lun is for VCM ,0001- 0006 for protected and in most of the cases 0007 and 0008 are automatically assigned by symm to sfs luns

10                  To convert the devices to BCV devices create a configuration file

SUN1#convert_BCV

Convert  dev  0009:0010 to BCV;

Wq

• The unprotected standard devices more  than 5 cylinders cannot be mapped by front end directors, unless it is converted to BCV device, hence the devices 0009 to 0010 total 8 devices are being converted to BCV devices.

11      Commit the configuration

SUN1#symconfigure  -sid   277  -v  -f   convert_BCV    commit –nop

• configuration is saved and eight LUNs are converted
• phases of this command are preview, prepare and commit
• -v verbose mode
• -f file parameter create_LUN, here  LUN specifications are enclosed
• Commit: to perform the activity
• -nop: non interactive session and no prompting

12     To display the LUNs which have not been mapped

SUN1#symdev list – noport

• Displays the sym devices which have not been mapped to any of the front-end directors and its ports

1. To display the available front end ports

SUN1#symcfg –sid  277  list  -connections

• It displays the front end directors and their ports to which the hosts are connected

1. To check the available address in sym

SUN1#symcfg  -sid  277  list  -available  -addresses  -dir  1c –p 0

SUN1#symcfg  -sid  277  list  -available  -addresses  -dir  1d –p 0

SUN1#symcfg  -sid  277  list  -available  -addresses  -dir  16c –p 0

SUN1#symcfg  -sid  277  list  -available  -addresses  -dir  16d –p 0

• It shows the available logical unit address to which the sym devices in host can be mapped

  • The available logical address to map is seen in the last field which is preceded by status field where it shows available

example :

*        – AVAILABLE-        002

• The logical unit address is in hexadecimal number.

 

 

 

 

15      Create a file to Map the devices and the specifications

SUN1# vi map_BCV

Map dev 0009:0010  to dir1c:0, Lun=002;

Map dev 0009:0010  to dir1d:0, Lun=002;

Map dev 0009:0010  to dir16c:0, Lun=002;

Map dev 0009:0010  to dir16d:0, Lun=002;

:wq

• Map the sym devices with the Lun address 002  in sym box  through the front end directors port 0

16  Commit the activity

SUN1#symconfigure –sid 277 –v –f  map_BCV commit –nop

• Configuration is saved and eight  LUNs are Mapped
• Phases of this command are preview, prepare and commit
• -v verbose mode
• -f file parameter map_LUN  LUN specifications are enclosed
• Commit: to perform the activity
• -nop: non interactive session and no prompting

17  Scan the devices once again at host level

SUN1#devfsadm –Cv

• Scans the changes in hosts

13         Check the controller

SUN1# fcinfo

• Displays controller number and its wwpn address

14         configure the controller

SUN#cfgadm –c configure C3

• Configure the host controller c3 to map the symdevs with LUN address

20   Discover the sym devices

SUN1#symcfg discover

21   To list the devices

SUN1#symdev list

• Displays the newly added & mapped sym devices
• As the devices are  mapped the directors field displays ***:**

If the devices are not mapped properly reboot the host onceLNot Recommended