quote:

---

Originally posted by em_ar_ducks
http://www.microsoft.com/windows200...zer/default.asp

Its pretty handy for helping estimate what you are asking about.

Be prepared to answer a bunch of questions for the tool to give you an answer.

---

code:
Component     Operations     RAID 
O/S           Read and write RAID 1 
log files     mostly write   RAID 1 
database      mostly read    RAID 1 or 0+1   
SYSVOL        mostly read    RAID 1 or 0+1 

quote:

---

Originally posted by jeff_j_black
Quote from the Windows Server 2003 Deployment Guide:

To prevent single disk failures, many organizations use a redundant array of independent disks (RAID). For domain controllers that are accessed by fewer than 1,000 users, all four components generally can be located on a single RAID 1 array. For domain controllers that are accessed by more than 1,000 users, place the log files on one RAID array and keep the SYSVOL shared folder and the database together on a separate RAID array, as specified in Table 4.3.

Table 4.3 RAID System Requirements

code:
Component     Operations     RAID 
O/S           Read and write RAID 1 
log files     mostly write   RAID 1 
database      mostly read    RAID 1 or 0+1   
SYSVOL        mostly read    RAID 1 or 0+1 

Note

If cost is a factor in planning for disk space, you can place the operating system and Active Directory database on one RAID array (such as RAID 0+1) and the Active Directory log files on another RAID array (such as RAID 1). However, it is recommended that you store the Active Directory database and the SYSVOL shared folder on the same drive.


Adsizer is a great tool. Also check the Windows Server 2003 Deployment Guide for general DC capacity planning guidlines.

---