LSI 1600 User Manual
Chapter 8 Troubleshooting
113
Other Potential Problems
Topic
Information
DOS ASPI
MEGASPI.SYS, the MegaRAID DOS ASPI manager, uses
6 KB of system memory once it is loaded.
6 KB of system memory once it is loaded.
CD-ROM drives
under DOS
At this time, copied CDs are not accessible from DOS even
after loading MEGASPI.SYS and AMICDROM.SYS.
after loading MEGASPI.SYS and AMICDROM.SYS.
Physical Drive Errors
To display the MegaRAID Manager Media Error and Other
Error options, press <F2> after selecting a physical drive
under the Physical Drive menu, selected from the Objects
menu. A Media Error is an error that occurred while
actually transferring data. An Other Error is an error that
occurs at the hardware level because of a device failure,
poor cabling, bad termination, signal loss, etc.
Error options, press <F2> after selecting a physical drive
under the Physical Drive menu, selected from the Objects
menu. A Media Error is an error that occurred while
actually transferring data. An Other Error is an error that
occurs at the hardware level because of a device failure,
poor cabling, bad termination, signal loss, etc.
Virtual Sizing
The FlexRAID Virtual Sizing option enables RAID
expansion. FlexRAID Virtual Sizing must be enabled to
increase the size of a logical drive or add a physical drive
to an existing logical drive. Run MegaRAID Manager by
pressing <Ctrl> <M> to enable FlexRAID Virtual Sizing.
Select the Objects menu, then select the Logical Drive
menu. Select View/Update Parameters. Set FlexRAID
Virtual Sizing to Enabled.
expansion. FlexRAID Virtual Sizing must be enabled to
increase the size of a logical drive or add a physical drive
to an existing logical drive. Run MegaRAID Manager by
pressing <Ctrl> <M> to enable FlexRAID Virtual Sizing.
Select the Objects menu, then select the Logical Drive
menu. Select View/Update Parameters. Set FlexRAID
Virtual Sizing to Enabled.
BSD Unix
We do not provide a driver for BSDI Unix. MegaRAID
does not support BSDI Unix.
does not support BSDI Unix.
Multiple LUNs
MegaRAID supports one LUN per each target ID. No
multiple LUN devices are supported.
multiple LUN devices are supported.
MegaRAID Power
Requirements
The Maximum MegaRAID power requirements are 15
watts at 5V and 3 Amps.
watts at 5V and 3 Amps.
SCSI Bus
Requirements
The ANSI specification dictates the following:
The maximum signal path length between terminators is 3
meters when using up to 4 maximum capacitance (25 pF)
devices and 1.5 meters when using more than 4 devices.
meters when using up to 4 maximum capacitance (25 pF)
devices and 1.5 meters when using more than 4 devices.
SCSI devices should be uniformly spaced between
terminators, with the end devices located as close as
possible to the terminators.
terminators, with the end devices located as close as
possible to the terminators.
The characteristic impedance of the cable should be 90 +/-
6 ohms for the /REQ and /ACK signals and 90 +/- 10 ohms
for all other signals.
6 ohms for the /REQ and /ACK signals and 90 +/- 10 ohms
for all other signals.
The stub length(the distance from the controller's external
connector to the mainline SCSI bus) shall not exceed.1m
(approximately 4 inches).
connector to the mainline SCSI bus) shall not exceed.1m
(approximately 4 inches).
The spacing of devices on the mainline SCSI bus should be
at least three times the stub length.
at least three times the stub length.
All signal lines shall be terminated once at both ends of the
bus powered by the TERMPWR line.
bus powered by the TERMPWR line.