longbit wrotewaw thanks for the replies, now for sure i will be using NAS 'cause i need w file server and the data base is huge so...
but the main OS will it be installed on the blades HDD or the NAS ? same for the vmware it self ?and the virtual machines to.
what version of vmware, esx? if so, you have three several options, the best in regards to features, capabilities and performance is to use SAN. the closest you can get to a SAN is to make use of ISCSI.
NOTE:
SAN != NAS
SAN works at the block level, expensive but worth the buck if you know how to use it.
NAS works at a file level, basic bulk stuff.
ISCSI, is the next best thing to SAN in regards to features, but not necesserely performance, but it will get you arround and i would use it instead of NFS.
I definetly would not situate the DB on a NAS, that is the most stupid thing you can do. (well actually there is one DB setup that requires NAS shares but that is for a totally dedicated and simple usage, not to used for the DB data itself).
if you are using esx/esxi, the system gets installed on in the local drive of the blade. there is the possibility of installing on SAN block devices, hence boot from SAN, but i see no reason for such or even why you would want to do that. if you would use cisco blade technologies, it has a feature with which it would provide similar and more reliable feature to the likes of boot from SAN. CISCO basically would abstact the MAC/WWN from the hardware so that any blade could be any blade even at a "logical" hardware level.
NAS should be used for the likes of office file sharing and transit.
yet, a NAS is not an archiving solution. it is not the right tool for that. per application and technology, NAS method is one of the methods to use for connecting but it differs by adding retention for compliance.
in short, NAS is not for heavy duty use (or even average if you ask me) it is can be lousy on small files, runs better with larger files. NAS is not intended for archiving or backup. NAS has never been considered to be used for DB storage.
