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Increasing TDEV size on VMAX with either SMC or SYMCLI

Is it possible to increase the size of a Thin Device on the VMAX using either SMC or SYMCLI?!  I can do it easily on our CX arrays but I was given a request to increase the size of of a thin lun and I can't for the life of me find how to do it on SMC and SYMCLI isn't very helpful either.

I don't have a problem with fixing things on the VMAX but increasing the size of a lun (from say 36GB to 100GB) doesn't seem to be easy to find.  Is there some way to do it like Unisphere or is this a case where I'll have to create a larger device and migrate the data?

Any quick/easy answers appreciated!

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Re: Increasing TDEV size on VMAX with either SMC or SYMCLI

You cannot increase or decrease the size of an individual TDEV on a Symmetrix. What you can do is convert it into what we call a metavolume by connecting it to other unused devices. The additional devices will add capacity to the original device without changing any identifying information of it other than size. We offer either concatenated metavolumes or striped. See this document for more detail:

http://powerlink.emc.com/km/live1/en_US/Offering_Technical/Technical_Documentation/300-006-718.pdf

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Re: Increasing TDEV size on VMAX with either SMC or SYMCLI

Ok that helps to some extent but I don't see any options for creating a meta volume from the existing device.  I will check your document and see if I can find the right answer.  That's definitely been helpful from both of you.  Since I've never had the need to expand luns on a DMX or VMAX (without migration) this is all new to me.

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Re: Increasing TDEV size on VMAX with either SMC or SYMCLI

Something like this:

symconfigure -sid XXXX -cmd "form meta from dev AAAA, config=concatenated;

add dev BBBB to meta AAAA;" commit -nop

If pre-allocating:

symconfigure -sid XXXX -cmd "start allocate on tdev AAAA start_cyl=0

end_cyl=last_cyl;" commit -nop

From:

jarbarian <emc-community-network@emc.com>

To:

Daniel Jastredowski <dpjastredowski@jonesday.com>

Date:

05/01/2012 02:55 PM

Subject:

New message: "Increasing TDEV size on VMAX with

either SMC or SYMCLI"

EMC Community Network

Re: Increasing TDEV size on VMAX with either SMC or SYMCLI

created by jarbarian in Symmetrix Support Forum - View the full discussion

Ok that helps to some extent but I don't see any options for creating a

meta volume from the existing device. I will check your document and see

if I can find the right answer. That's definitely been helpful from both

of you. Since I've never had the need to expand luns on a DMX or VMAX

(without migration) this is all new to me.

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Re: Increasing TDEV size on VMAX with either SMC or SYMCLI

Ok thanks for the help. I will try some of the options listed and report back.

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Re: Increasing TDEV size on VMAX with either SMC or SYMCLI

Yeah this isn’t working. I am getting the “missing action” error. Keep in mind I did put in the proper SID and device name.

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Re: Increasing TDEV size on VMAX with either SMC or SYMCLI

You're missing the "add dev" portion of the command. I know this works.

symconfigure -sid XXXX -cmd "form meta from dev AAAA, config=concatenated; add dev BBBB to meta AAAA;" commit -nop

If pre-allocating:

symconfigure -sid XXXX -cmd "start allocate on tdev AAAA start_cyl=0 end_cyl=last_cyl;" commit -nop

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Re: Increasing TDEV size on VMAX with either SMC or SYMCLI

Got it, thank you!

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Re: Increasing TDEV size on VMAX with either SMC or SYMCLI

Do you/anyone have steps or documents to perform this steps with Unisphere?  Thx

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Re: Increasing TDEV size on VMAX with either SMC or SYMCLI

You need to turn it into a meta-device to expand.

From:

jarbarian <emc-community-network@emc.com>

To:

Daniel Jastredowski <dpjastredowski@jonesday.com>

Date:

05/01/2012 02:11 PM

Subject:

New message: "Increasing TDEV size on VMAX with

either SMC or SYMCLI"

EMC Community Network

Increasing TDEV size on VMAX with either SMC or SYMCLI

created by jarbarian in Symmetrix Support Forum - View the full discussion

Is it possible to increase the size of a Thin Device on the VMAX using

either SMC or SYMCLI?! I can do it easily on our CX arrays but I was

given a request to increase the size of of a thin lun and I can't for the

life of me find how to do it on SMC and SYMCLI isn't very helpful either.

I don't have a problem with fixing things on the VMAX but increasing the

size of a lun (from say 36GB to 100GB) doesn't seem to be easy to find. Is

there some way to do it like Unisphere or is this a case where I'll have

to create a larger device and migrate the data?

Any quick/easy answers appreciated!

Reply to this message by replying to this email -or- go to the message on

ECN

Start a new discussion in Symmetrix Support Forum by email or at ECN

==========

This e-mail (including any attachments) may contain information that is

private, confidential, or protected by attorney-client or other privilege.

If you received this e-mail in error, please delete it from your system

without copying it and notify sender by reply e-mail, so that our records

can be corrected.

==========

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Re: Increasing TDEV size on VMAX with either SMC or SYMCLI

HI

you should refer to online help for both product SMC and unisphere for vmax

Form Meta dialog box

Use this dialog box to manage metadevices in your configuration.

This dialog box contains the following elements:

* SMC will consider the first device added to the meta device to be the meta head and will further filter the available devices according to its attributes.
 

================

note: smc EOPS in 2017

https://support.emc.com/products/6226_Symmetrix-Management-Console---SMC/Documentation/

https://support.emc.com/products/27045_Unisphere-for-VMAX/Documentation/

page 248 from https://support.emc.com/docu78882_Unisphere-for-VMAX-8.3.0-Online-Help.pdf?language=en_US

Regards,

Oleh

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Re: Increasing TDEV size on VMAX with either SMC or SYMCLI

Following the steps on page 248 of document, I am not able to see all my existing tdev’s. Is that normal?

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Re: Increasing TDEV size on VMAX with either SMC or SYMCLI

Good Day,

can you check if these devices are listed from symcli e.g. symdg list -sid XXX

can you run discovery in SE symcfg disco and in UNIVMAX UI.

regards,

Oleh

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Re: Increasing TDEV size on VMAX with either SMC or SYMCLI

Hi,

You might need to check your code version first, if your code is supported with symcli 8.3.0 we can change TDEV device size directly from symdev command:

symdev -sid [symmID] modify [symmDEV] -tdev -cap [new size] -captype <cyl|mb|gb|tb>

Referred to SYMCLI 8.3.0 CLI Reference Guide (page 159)

Kawin.

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Re: Increasing TDEV size on VMAX with either SMC or SYMCLI

Note: Increasing a TDEV size is only available on VMAX3 and All Flash running HYPERMAX 5977. Older generation VMAXes (10K/20K/40K) will still require a meta device for expansion.

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