disk speed (rpm)

[Guest zerbie45@gmail.com]

hello,

 

I'm about to roll out a couple of windows 2003 sql server 2005 for a

financial platform (banking industry).

the servers use local hard disks to boot (drive c) but are attached to

a san for holding data (drive d).

 

now I noticed that the local sas disks are 15k rpm fast, while the

disk hosted on the san only is 5k fast.

I don't have that much know how with san solutions, but is it normal

that san disks are so slow (our san is from hitachi) ? would it be

better to use local disks for our sql server (the databases are used

very heavily) ?

 

does rpm makes a big difference in terms of sql server operations ?

 

thanks in advance for any help.

regards,

zz