extension of c drive

Im sure the only way of finding out what raid setup you have is via BIOS on a hardware raid, however if it was software it could be found, it would depend on if the hardware would support scalability, but most likely you would have to backup the array add the drive then rebuide and restore the data.

if you have 146mb worth of space on C then you would be using RAID 5. as the would be 2 in the array for storage and 1 spare for errors etc.. whats the size of your C:?

There are some hardware RAID solutions that give access to RAID control from windows.  Since these are hot-swappable, it would make sense that there is such a utility.  Looking at the vendor's website it looks like they have a utility called GAM (Global Array Manager).  You can find it via:

http://www.lsi.com/cm/DownloadSearch.do?locale=EN

As for actually increasing the size this is a two step process:  Increase the array, then increase the NTFS filesystem.  Hopefully the GAM utility is able to do both.  If not, there is a Linux utility called ntfsresize that is included in many live CD/DVDs that can resize ntfs partitions, but I am unsure how it would work with RAID array.

As another option, depending on how many more hard drives you can add, you could create an entire new array and mount this second logical drive as a folder in the C: and move data to this new folder, instead of trying to increase the size of the array/existing logical drive

Sterling

Thank you very much for your useful information. My c drive is 24 gb.Can you please suggest me how to move exchange databases and SQL server to another partition without affecting the opeartional databases.Currently all my SQL backups are sitting on C drive occupying 7 GB.Can i move them to different partition.Does this affect operational databases.

For SQL, I would suggest you check out:
http://www.microsoft.com/technet/prodtechnol/sql/2000/maintain/sqlbackuprest.mspx

I would expect you'll find instructions for changing the path to the backup file.

For Exchange, see:
http://www.petri.co.il/move_exchange_stores_to_a_different_disk.htm

if you still want to expand it, i recommend bootit-ng :   www.terabyteunlimited.com/       
it works on raid drives : http://www.terabyteunlimited.com/kb/article.php?id=024

I moved exahnge server information store to another drive. and also logs to another drive.But still logs show in c drive. can you suggest me how to avoid edb and reslogs filling up C drive.

Thanks