USERS GUIDE18You may want to change the drive letter for convenience, or because there was achange to existing drive letters when you installed your ORB Drive. Changes toexisting drive letters may cause problems with applications installed on the driveswith changed letters.Installation Help Note 001, Drive Letter Assignment, covers in detail how drive let-ters are assigned and the ways available to reassign drive letters. This Help Note isavailable on our web site at www.castlewood.com.2.5 LARGE DRIVE SUPPORTWindows EnvironmentWindows 98 and Windows 95 OSR2 or later support the use of partitions greaterthan 2 GB (gigabytes) in capacity with FAT32. The maximum supported partitionsize is 2 TB (terabytes). Large drive partition support can help you dramaticallyreduce the amount of wasted space on your computer’s hard disk.One should be aware that this FAT32 configured partition can only be recognizedand accessed by Windows 98 and Windows 95 OSR2 or later. DOS, Retail Windows95 (original Windows 95), and Windows NT 4.0 or earlier cannot access a FAT32partition.Mac EnvironmentMac OS 8.1 and later supports Mac OS Extended File Format (HFS+). This largedrive partition support can help you dramatically reduce the amount of wastedspace on your ORB Disk.One should be aware that this Mac OS Extended format can only be recognized andaccessed by Mac OS 8.1 or later.2.6 PARTITIONING A DISKYour ORB Drive comes with a 2.2GB ORB Disk. The ORB Disk is a high quality andhigh capacity hard disk. If you purchased an ORB SCSI Drive, the ORB Disk is pre-formatted with one 2.16GB extended FAT16 partition. The format can be set to yourpreference. The ORB Drive and Disk partition behave like any Hard Disk Drive thatyou have on your system. The following table shows the format options that exist toyou based on your operating system.