Flash Memory Free on V90 XPe device is running low

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  • #1710
    Avatarplantolf
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    We currently have the V90 and V90LE models with 512MB Flash/512RAM.
    What type of issues should I expect to see as my available Flash decreases. It is down to 100MB free. Also, is there a “don’t go below this amount” threshold because things will start to happen value.

    Trying to understand the true relationship between Flash and RAM.

    Thank you,

    /paul

    #14917
    ConfGenConfGen
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    Why should your flash run out of space? It is write protected so no data can be written to the space as long as the write filter is enabled.
    A standard Wyse XPe unit has 512 MB of RAM and same of flash. Part of the RAM is used for video RAM. Another part is used for the RAM disk and the write filter cache file. This can easily result in 64MB+16MB+xxMB = up to 100-150MB of RAM. But this shouldn’t be an issue.
    As soon as the WF cache exeeded a special limit it will give you a warning meesage. Next level it will reboot the unit.

    HTH

    CG

    #14927
    Avatarplantolf
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    Thanks for the info. We do make it a standard practice to Enable WF so no unnecesary stuff gets written.

    Our V90 is running:
    V3.04 (Bld 0503.512)
    XPe ver. 5.01/Sp2
    CPU 1000

    Our V90LE is running:
    V4.06 (Bld 0596.512)
    XPe ver. 5.01/Sp2
    CPU 1200

    I noticed the available free space on the V90LE is @100MB less than the V90. I can only assume that the new firmware accounts for the difference. If Flash acts like a HDD and you start to run out of space, I would expect you to see performance issues.

    We are looking into other things to install on the V90LE (i.e. HotDesk Top, .Net…) as part of POC for future projects and I want to understand before going into it what I can expect when Flash is filling up.

    /paul

    #14939
    ConfGenConfGen
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    There is nothing to expect if flash is running low. No performance issues.

    CG

    #14949
    Avatarplantolf
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    Ahhh – so then it doesn’t act quite like a hard drive when space is low. Good to know.

    #14967
    Avatarplantolf
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    Here is a response from Wyse technical support:

    If the thin clients are run with the Write Filter disabled, all bets are off. The flash will eventually fill up and you will see performance issue, but it may cause damage to the flash.

    The ramifications of not having enough free space on the thin client is the performance will slow down, and if the Ram Drive (temporary drive) is filled up, the thin client will reboot to clean up the RAM Drive.

    The Wyse XPE thin clients have a ram disk, a temporary drive (Z drive) that is part of the C: drive. This size of this drive varies from unit to unit with a maximum of 99MB. (You can find the max size of your thin client by logging in as Administrator -> Start -> Settings -> Control Panel -> Ram Disk icon. The dialog box will have “Ram Disk Limit for current configuration in MB: â€￾.)

    It is recommended to free space of the Max Ram Drive + 10MB. For example, if the Ram Drive is 75MB, then it is recommended to have 85MB free.

    Any comments?

    #14974
    ConfGenConfGen
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    Even if the RAM is at 0KB left, it will NEVER let the unit reboot. This is wrong.
    Correct is, that the Write Filter cache can initiate a reboot if it is filling up.

    As a unit with enabled WF is not able to write anything to the flash drive, there is no reason for me why the unit should slow down.
    A standard XP PC is slowing down because the OS has no room left to write its pagefile in one part and it is fragmented then. This, of course, needs time to read all small parts. But XPe does not have a pagefile at all. All changes are written to the WF cache and deleted while rebooting.

    CG

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