admingirl

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admingirl

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February 9th, 2011 12:00

creating 2gb device from 8GB hyper

Hello,

I looked in the cli guide and I need to validate if my create-dev file is correct.

I want to create a 2gb drive from an 8.632GB hyper, raid-10.

The geometry is standard, 1 cylinder = 15 tracks, .937 MB for each cylinder. So I am thinking I need 1 devices, 2200 cylinders.

Does this sound about right?

I have only created larger meta devices before and not a smaller device. No training, I am still a DMX newbie so any insight would be helpful.

Admingirl

  • Booyah2

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    Posted February 9th, 2011 13:00

    Ok, should work out perfect... I have a cylinder to gigabyte calculator... But you have to have a DMX 3 or later storage device for this calculation.

    If your storage array is earlier than DMX 3 then you will need a 4400 cylinder device due geometry changes within the arrays technologies.

    Good Luck!

    Thom

  • admingirl

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    Posted February 9th, 2011 13:00

    Thank you so much!!  I am going to try it now.

  • dynamox

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    Posted February 9th, 2011 13:00

    1 cylinder = 960K (on DMX3 +)

    so if you convert 2GB to KB =~ 2097152 KB

    now 2097152 KB / 960 KB  =  2184 cylinders

  • Booyah2

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    Posted February 9th, 2011 13:00

    Ooops, finge check.

    That would be 2.0142G device for 2200 cylinders

  • admingirl

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    Posted February 9th, 2011 13:00

    Thank you, thank worked!

  • Booyah2

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    Posted February 9th, 2011 13:00

    Yes, for a DMX3 FBA device of 2200 cylinders = 2.1042G

  • Booyah2

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    Posted February 9th, 2011 14:00

    Just out of curiosity... Which calculation came out the closest??

         My calculator (provided by EMC)

              or Dynamox's formula??

    I'm not a math wizard... I have to use a calculator... Heehee

  • admingirl

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    Posted February 9th, 2011 14:00

    Thank you Dynamox!