Thinkpad A21m won't boot from DVD drive
I recently got an A21m off a friend for a good price, and am much pleased with it except I can't get it to boot from the internal DVD-RW drive, which does not appear to be original equipment.
When I go into BIOS to tell it to boot first from the DVD drive, I get an odd exclamation mark symbol beside the drive, without apparent explanation. When I then go to reboot, I can see/hear no evidence that BIOS is even trying to boot from DVD.
Needless to say I have tried to boot from several CD-ROMs that have been observed to boot in other machines, and the DVD drive works just fine for reading and writing when I boot into Debian Sarge from the hard-drive.
I have spent hours searching Google and the IBM support site, so if any old Thinkpad hand has any suggestions, they would be appreciated.
syslog tells me this about the drive:
kernel: SCSI subsystem driver Revision: 1.00
kernel: hdd: attached ide-scsi driver.
kernel: scsi0 : SCSI host adapter emulation for IDE ATAPI devices
kernel: Vendor: MATSHITA Model: DVD-RAM UJ-815A Rev: DZJ1
kernel: Type: CD-ROM ANSI SCSI revision: 02