Adaptec RAID 2100S Software User's Manual page 23

Storage Manager on ROM
Scan Delay (SCSI only)
Some devices require a time interval between power on, bus reset,
and scan or they do not respond correctly. If devices are not
displayed in the Tree View after power on, set the delay to a longer
interval.
EBDA Relocation
This setting determines the way that RAID controllers handle
Extended BIOS Data Area (EBDA) relocation. You can enable this
option to help avoid conflicts with other adapter cards if the
controller is installed in a host system with other adapters that
follow standard EBDA relocation rules.
Enable Extended Int13
This option enables extended Logical Block Addressing (LBA) for
hard drives. LBA enables operating system access to drives larger
than 8.6 GB. You should not change this setting.
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