Unplug the scsi device and see if it boots....or check the cable or address........See below... lsdev -Cs scsi lsdev -Cc adapter lsdev -Cc disk
0514-047
Cannot access a device
Possible Causes
You specified the wrong connection address to make a device available.
The device that you are trying to add is not attached to your system or has hardware problems.
Procedures for Recovery
Check your device to make sure that you entered the correct connection address.
If your device is connected to a SCSI card, the number is on the back of the device.
This number is a single-digit number. In order to convert it to a connection number,
add a 0 (zero) digit to this number; that is, if the number is 1(one), the connection
number is 10, and if the number is 2, the connection number is 20.
Check to make sure that no other device attached to the SCSI card has the same
connection number as your device.
Use the lsdev command to check the connection numbers of the device attached to
the SCSI card. If there is one number that matches your connection number, change
the number on the back of your device to a unique number.
If you are using SMIT, return to the SMIT screen where the error occurred and enter
the appropriate connection number. Otherwise, reenter the mkdev command with the
appropriate connection address.
If your device is connected to a serial port, check to see if it is plugged in to
the correct serial port, then rerun your command.
If you suspect there is a hardware problem:
1.Check your cables to make sure that they are attached correctly.
2.Check to see if your device is turned on.
3.Run diagnostics by using the diag command.