Infortrend RAID Controller Manual

Appendix
E
Differences in Logical
Drive Format
Departure of Firmware Release 3.21 from 3.15 / 3.16
Compatibility:
Lines of Firmware:
1. 3.21: Firmware revision 3.21 is implemented with a subfunction
that creates a reserved space on drives for the
RAIDWatch programs. This allows users to access the manager
programs from a remote station using standard web browser.
Chapter 4 has more details on how the function works.
2. 3.15: Another line of firmware - revisions including 3.15 and
3.16 - will not support RAIDWatch Onboard and will run on
controllers that are shipped without the LAN port.
3. Users can apply revision 3.21 on all SentinelRAID and
EonRAID series. On the contrary, revisions 3.15 and 3.16 can
not be used on the newest line of RAID controllers that support
Ethernet connectivity.
Under some circumstances, i.e., replacing a failed controller, users
might accidentally use a controller running earlier firmware for a
temporary replacement. In this case, the controller will not be able
to access the array originally created by revision 3.21. The best way
to ensure compatibility is to always apply a replacement controller
installed with the same version of firmware.
Listed below are things to notice about the incompatibility:
1. The size of reserved space on drives is different.
Firmware version 3.15 3.21
Disk reserved space 64KB 256MB
(default)
2. Firmware 3.21 can readily accept the logical array created by the
Logical Drive Format Differences E-1