VMware ESX 3.5 - Recommended Block size for a 1.75TB datastore for a single (file) server

Posted on 2009-04-26
Last Modified: 2012-05-06
What block size would you recommend for the 1.75TB datastore? I remember using a quite small one last time, which had the downside that a VMDK can have a maximum size of 256GB. If you're about to create a Windows Disk with >1TB store, that's a bit of a hassle, as you need to create a dynamic disk over multiple VMDKs.
Question by:Scripting_Guy
    LVL 30

    Accepted Solution

    Referring back to your EMC question, try to align file system block size with the block size or stripe size on the CLARiiON for maximum performance. You can also have some fun and games with tuning write cache page size, but be very careful with this. You can kill the array's performance because it can spend more time managing tiny write cache pages that doing useful I/O.
    LVL 2

    Assisted Solution


    If you using VMFS3 than use 8 MB block size during the format and then you can use 2 TB virtual disks.

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