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  • 1.  100% of effective capacity fs5200

    Posted 10 days ago

    Hello, Can I use 100% of the effective capacity (TiB) of an FS5200? Will it affect performance or other issues if I use all the available space?
    Greetings.



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    Miguel Peralta
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  • 2.  RE: 100% of effective capacity fs5200

    Posted 8 days ago

    Miguel,

    Best practice, and what TD Synnex UK inform all customers of, is to use max 80% to allow any background process, such as garbage collection, to be unaffected.

    Russ



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    Russell Shacklock
    IBM Power and Storage Specialist
    TD Synnex UK
    +447872400311
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  • 3.  RE: 100% of effective capacity fs5200

    Posted 7 days ago

    Hi Miguel,

    please consider the following support flash for capacity planning >> https://www.ibm.com/support/pages/do-not-provision-100-physical-flash

    Best regards



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    Paul Finger
    Technical Leader Brocade SAN
    System Vertrieb Alexander GmbH
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  • 4.  RE: 100% of effective capacity fs5200

    IBM Champion
    Posted 7 days ago

    It's important to understand that the 100% effective capacity of your FS5200 system is not static (if you're using FCMs). Factors such as data type/compressibility, deduplication ratio (if using DRP) can all affect it. For example, if new data arrives with a lower compression ratio, your effective capacity could drop below the current effective capacity due to increased physical storage consumption. 



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    Nezih Boyacioglu
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  • 5.  RE: 100% of effective capacity fs5200

    Posted 7 days ago

    Hello Miguel,

    We should not use 100% of the effective capacity as it can result insufficient space to keep up the write operations and garbage collection which can lead to variety of problems like poor drive performance. Flash drives depend on free pages availability to process new write operations and process garbage collections. 

    Recommendation is to have used space less than 85% or 80% if SVC is being used to present storage.



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    Rohit Chauhan
    Senior Technical Specialist
    Norway
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