What is the best practice to Raw Device?

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1

Misters:

I have a two question and I think there can help me.

  1. What is the best practice to implement Raw Device on ADABAS 3.3.2 or other version?

  2. I have a database with raw device of 4GB size ¿Can I do increase the size to 8GB? My storage is hitachi.

Thanks.

2

What’s your OS?
What’s your container size and blocksize?
Of course you can increase the size of raw device, but It depends on your disks configuration.

3

Hi,

General hints for raw devices:

  1. Use OS command to create raw device, aware of the block size selection. It always depends on your record size

  2. Set the permission to raw device (e.g. owner: sag, read-write)

  3. Use adabas utility “ADADEV” to initialize the raw device

  4. Determine ASSO,DATA,WORK containers blocksize (every I/O is done on block level)

  5. Use adabas utility “ADAFRM” to create database

Do you have a real need to go with raw disk ? File system is now just as fast as raw disk than in the past OS and a lot easier to manage.

Regards,
Tony