>Hi,
>
>Our RAS Server has two drives. Drive C: has FAT file system and has NT installed on it. Drive D: has NTFS and has a volume set created. C: contains a PageFile.Sys file which is uses for file swapping, but so does drive D:. I can't understand why it would if the operating system is installed on the C: drive. Or should it or could it possible require the PageFile.Sys on drive D:? I have it removed now but I need to replace it if it is necessary. I know this is not VFP related, but there are alot of smart people in here and I am hoping that someone has some advice on this one.
>
>I need to know this as soon as possible, so any speedy responses would be greatly appreciated.
>

NT can allocate paging space on more than one drive; there's no fixed location for the NT swap file (in actuality, for some functionality, you need at least a roughly 2MB swap file space on the system partition.) It's not uncommon to see swap files on multiple drives; if this is the case, though, it indicates that someone did something to adjust the default swap file assignments, and I'd try to find out the rationale for this before changing anything, especially if you aren't familiar with administering NT and things work fine with the current swap file settings.

You can significantly boost NT performance by allocating swap file space on multiple physical drives - it does not make sense to allocate swap file space on multiple logical drives of a single physical drive (IOW, if you have phsyical drives C: and D:, putting some of the swap file space on each drive makes sense, since the operating system can make intelligenty decisions about which physical drive is less 'busy' when it needs to do a swap, but if you have one physical drive divided into drives C: and D:, it will hurt performance under most circumstances to put swap file space on each logical drive, since there'd be significant physical head movement involved in accessing the swap file space between sections of the same drive.) Mucking about with swap files under NT without understanding how the swap files are used is a good way to break things in new and interesting ways, since NT uses the swap file for more than simple paging space.

You might want to look at http://www.ntfaq.com for more detailed information; there are several entries about the NT swap file in the FAQ.

>Thanks.
>
>Jolene Dicks