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Posts Tagged ‘Symmetrix’

LUN and VBUS Mapping for HP-UX

January 10th, 2009 1 comment

Here are the set of commands needed for mapping LUNS and VBUS on a HP-UX system.

Your command file should look like.

map dev XXX to dir FA:P, vbus=X, target=Y, lun=Z;

Parameters:
XXX is the Symmetrix device being mapped
FA is the director the device is being mapped to
P is the port on the FA
X is the virtual bus value (valid values 0-F)
Y is the target id (valid values 0-F)
Z is the lun address (valid values 0-7)

The symcfg –sid xxx list –available –address (Blog on available list of LUNS on a FA for mapping) will display LUNS above 7, but these are not valid and usable by HP-UX. 

You will have to find the next available LUN 0-7. If there are no more available addresses on any VBUS you can map a device and specify the next VBUS. This will create a new VBUS and adds the available LUNS to it.

In the case where the HP-UX host is shared on the FA with another host type and heterogeneous port sharing is being used, it is only necessary to specify a LUN address. 

You will need to enable the Volume Set Address (V) flag on the FA or it will end up in error. The LUN address specified should be 3 digits, containing the required VBUS, target and LUN values. This LUN address will be interpreted as VBUS, target and LUN when the HP-UX host logs into the Symmetrix.

LUN Addresses on a FA Port available for mapping

January 9th, 2009 No comments

Before you are ready to map devices to an FA Port via command line (symcli) you will need to determine what LUN (hyper) addresses are available out there for mapping purposes (unused).


symcfg list -sid xxxx -FA dir -P port -available -addresses

Parameters

xxxx is the last 4 digits of the symmetrix serial number
dir is the FA director number eg 4B
port is the FA’s port number ie 0 or 1

This will produce an output that will indicate all available addresses, a range of available addresses with an asterisk (*).  Also the LUN (hyper) addresses displayed in this output are hexadecimal values.

For example, in the output below, the available LUN (hyper) addresses are 06 through 24, 29 through 7F and greater than 83.


Symmetrix ID: 000185701867 (Local)
Director Device Name Attr Address
—— ——– —- —- ——– —– — —–
Ident  Symbolic Port Sym  Physical VBUS TID LUN
—— ——– —- —- ——– —– — —–
FA-4B 04B 0 0000 Not Visible VCM 0 0 000
0901 Not Visible 0 0 001
0902 Not Visible 0 0 002
0903 Not Visible 0 0 003
0904 Not Visible 0 0 004
0905 Not Visible 0 0 005
– AVAILABLE 0 0 006 *
0925 Not Visible 0 0 025
0926 Not Visible 0 0 026
0927 Not Visible 0 0 027
0928 Not Visible 0 0 028
– AVAILABLE 0 0 029 *
0980 Not Visible 0 0 080
0981 Not Visible 0 0 081
0982 Not Visible 0 0 082
0983 Not Visible 0 0 083
– AVAILABLE 0 0 084 *

How to Map / UnMap a LUN (HYPER) in a DMX and Symmetrix System from SYMCLI

January 9th, 2009 No comments

This is a pretty easy symcli change, with solutions enabler installed the customer should be able to perform this change very easily. The command line should be used as follows. Save the file as a .txt file which is called your command file.

map dev SymDevName to dir DirectorNum:PortNum,
vbus=FibreVbus, target=scsitarget, lun=scsilun;

Parameters:

SymDevName is the symmetrix device name of the device to be mapped
DirectorNum is the number of the FA the device is being mapped to
PortNum is the port on the FA the device is being mapped to
FibreVbus is the virtual bus address
scsitarget is the scsi target id
scsilun is the scsi logical unit number or lun address

Once the command file has been created, the following command needs to be run to actually make the changes.

symconfigure -sid xxxx -f commit

In order to unmap a device from an FA, the device should first be made write disabled on the FA from which it is being unmapped:


symdev -sid xxxx write_disable SymDevName

Next, a command file with the following syntax should be created:

unmap dev SymDevName from dir DirectorNum:PortNum;

Parameters:

SymDevName is the symmetrix device name of the device to be mapped
DirectorNum is the number of the FA the device is being mapped to
PortNum is the port on the FA the device is being mapped to
Once the command file has been created, the following command needs to be run to actually make the changes.

symconfigure -sid xxxx -f commit

EMC Symmetrix Management Console

December 19th, 2008 1 comment

Overview:

The Symmetrix Management Console is a very important step towards allowing customers take a control of their Symmetrix / DMX Disk Arrays. As much as it allows a customer to manage their Symmetrix / DMX, it allows them to duplicate devices when provisioning. Customers can manage up to 6 Symmetrix Systems all through a web interface.

Important Features of Symmetrix Management Console are

  • 1) Simplify day-to-day Symmetrix management with ease-of-use capabilities.
  • 2) It takes minutes to install. Windows environment running a Windows Server 2003 along with IIS would be the best choice.
  • 3) The interface the customers work on is a GUI that has the looks and feels of ECC and the Console also integrates with ECC.
  • 4) New systems configured and managed through the Symmetrix Management Console.
  • 5) The console gives the customer capabilities for Discovery, Configuration, Monitoring, Administration and Replication Management.
  • 6) Allows customer to setup ILM policies for Tiered Storage including Symmetrix Priority Controls, Dynamic cache partitioning, SRDF and Timefinder replication.
  • 7) Manages Access Control through iSCSI CHAP (Challenge Handshake Authentication Protocol) and RADIUS (Remote Authentication Dial-in Service)
  • 8. Command line Generator for additional flexibility

Major strengths of Symmetrix Management Console are

  • 1) Management, Configuration, Administration of Symmetrix DMX.
  • 2) Dependable Local and remote replication management
  • 3) Robust information and system security

It is not a replacement to Symcli at this point but does make a SAN Admin’s provisioning and system management easy. It only allows configuration from a software level, will not allow perform any functions related to hardware changes (adding or replacing disk, adding or replacing FA’s, etc).

Symmetrix Management Console can be obtained from EMC Powerlink or through your account manager from EMC if you have an active contract in place with EMC for hardware/software maintenance or if your systems are under warranty.

Highly recommended management tool for SAN Admins and its free.