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Wireless Networks Thread, Slow GhostCast in Technical; So I thought I would spend the summer making sure that all our computers in the ICT Suite were identical ...
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    Slow GhostCast

    So I thought I would spend the summer making sure that all our computers in the ICT Suite were identical to each other. I was able to create the image over the network very quickly. However, depoloying the image through GhostCast to the other computers is taking forever.

    At the moment, it is due to complete in 4 weeks time. I am certain that it is all using the correct and most up-to-date network drivers, and have searched for any other factor that could slow it down (it claims it's going at 4mb/min...but I actually think it's going a lot slower than that).

    Has anybody else had this problem?

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    FN-GM's Avatar
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    Re: Slow GhostCast

    how many machines are you deploying the image to at one time?

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    Re: Slow GhostCast

    I have seen this before, but never found a solution.

    But what i did find was that if you start a couple of sessions using the same image and only have 2 pc's going to each ghost cast it ran at a reasonable speed. (2 ghost cast's on the server 4 remote pc's)

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    Re: Slow GhostCast

    We have. The network was saturated with traffic. We are currently imaging off the network with dedicated Ghost servers. Not ideal as we have to transport the servers to the rooms where imaging is required. Once imaging is finished we reconnect the stations to the network and then give them their station names. What a performance. I think our problems are down to the 3Com switches not being configured properly. I have tried to address this, but the switches seem to 'resist' any changes made or 'forget' the changes the next time there is a power cut. I wanted Cisco switches when the new network was installed but:

    1. Our network provider would not have supported us with these in place.
    2. They were deemed too expensive anyway.

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    Re: Slow GhostCast

    There could be several reasons:

    1) The drivers your using are buggy/wrong version.
    2) Your network infrastructure is poorly designed/faulty/overloaded.
    3) Your using the Unicast ghostcasting setting and are ghosting to many PCs.

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    Re: Slow GhostCast

    Quote Originally Posted by Geoff
    There could be several reasons:

    1) The drivers your using are buggy/wrong version.
    2) Your network infrastructure is poorly designed/faulty/overloaded.
    3) Your using the Unicast ghostcasting setting and are ghosting to many PCs.
    1) I'm certain they're the most up-to-date and correct drivers available. I went through a lot of trial and error to find them. Too much "error" for my liking!
    2) It is. But it manages to pump out MSIs at a rate of knots, so I would have thought it would do the same for Ghost images.
    3)I'm fairly certain I will have selected multicast. You've got me worrying now.

    I'm just scared that if I stop it I won't find a quicker solution, meaning that I have to start again. There were a few computers in the suite that didn't like the GhostCast so I might see if it is quicker to do them disk to disk individually.

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    Re: Slow GhostCast

    You can verify all 3 situations with a packet sniffer. Additionally, SNMP counters on your switches will give you more clues.

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    Re: Slow GhostCast

    Do these machine have sata hard drives?

    If so have you passed the -noide switch to the ghost client?

    Ben

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    Re: Slow GhostCast

    Quote Originally Posted by plexer
    Do these machine have sata hard drives?

    If so have you passed the -noide switch to the ghost client?

    Ben
    I heard about that. They do have SATA drives, but have heard mixed reviews about whether -noide is needed or not.

    If it is, where do I pass the switch (I'm a bit of a ghost novice).

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    Re: Slow GhostCast

    We had this kind of issue a few years back when the council had recently changed our router. For some reason the router felt the need to intercept all the Ghost packets through it's 10mb/s card and then let it pass to the machines.

    Got quite interesting as the router began getting bogged down with it all thus losing the Internet

    Dont know what they did to fix it but it doesnt do it anymore, might be the same problem for you?

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    Re: Slow GhostCast

    Indeed, that sort of behaviour is caused by Traffic Storm Control.

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    Re: Slow GhostCast

    We had the same problem with 3com switches and ghost. After talking to 3Com we fixed it by disabling Broadcast Storm, IGMP & Spanning Tree. See screen shot.
    Attached Images Attached Images

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    Re: Slow GhostCast

    Ghosting is very strange: We ghosted 6 machines based in two offices this morning at a total time of around 2 and half hours, and then just before we left did a IT suite of 28 machines in around 50 mins.

    Very strange.

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    Re: Slow GhostCast

    Anytime we have had this problem it has been due to one or more flaky NICs. We usually break the group down into smaller groups, and we usually find the 'bad' NICs about the time we finish... But, then we know which PC gets a new NIC!

    Alan

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    Re: Slow GhostCast

    What size is ur image?? Also whats the backbone to ur network?

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