Success! After some searching of the web and talking with another Linux user (not on this list) I isolated the problem. It appears to be a conflict between older versions of the aic7xxx driver, my Adaptec 2940U2W and the new 160MB/s capable Seagate SCSI drive. After patching the aic7xxx driver to version 5.1.22 (from 5.1.19), the system properly recognizes the new drive on boot-up. It seems that the new 160MB/s SCSI drives can kick around some new protocols on the bus. The older driver didn't like that and kept trying to reset the SCSI bus to clear up the "problem". Matt -----Original Message----- From: Zaleski, Matthew (M.E.) Sent: Friday, July 21, 2000 4:34 PM To: '[EMAIL PROTECTED]' Subject: Problems with SCSI and LM 6.1 Yes, I'm still running 6.1. I hope to jump to 7.1 next weekend, assuming I can get the following problem resolved. My current system is a Dell P2-450 with an Adaptec 2940U2W adapter and these drives (all SCSI): IBM LVD SCSI 18 GB (ID 0) Micropolis Ultra SCSI 9GB (ID 1) Plextor 8/20 CD Reader (ID 3) Plextor 8/20 CD Burner (ID 4) Conner 8GB Tape Drive (ID 5) The IBM drive is on an LVD cable and the remainder are strung on a narrow ultra scsi cable. I bought a Seagate Cheatah LVD 36GB drive. I attached the Cheetah (ID 2) to the 2nd to last connector on the LVD cable and fired the system up and went into the Adaptec BIOS. Adaptec saw the drive and I proceeded to low-level format the disk (I've been burned in the past when I didn't do that with a SCSI drive). All is well with the world. The format completes and I reboot to fire up Linux. The scsi driver loads and proceeds to identify ID 0 and 1 (the IBM and Micropolis drives). Then I get the following series of messages: SCSI: aborting command due to timeout : pid 18, scsi 0, channel 0 id2, lun 0 Test Unit Ready 00 00 00 00 00 SCSI host 0 abort (pid 18) timed out - resetting SCSI bus is being reset for host 0 channel 0 SCSI host 0 channel 0 reset for host 0 channel 0 SCSI host 0 channel 0 reset (pid 18) timed out - trying harder ... <repeats ad nasueam> At this point I have no choice but to ctrl-alt-del. The problem persists in future reboots. If I remove the drive from the chain, the system boots fine. Any ideas on what the problem might be? Below is a log of a successful initialization of the SCSI driver: Jul 21 15:29:05 av2443 kernel: (scsi0) <Adaptec AHA-294X Ultra2 SCSI host adapter> found at PCI 13/0 Jul 21 15:29:05 av2443 kernel: (scsi0) Wide Channel, SCSI ID=7, 32/255 SCBs Jul 21 15:29:05 av2443 kernel: (scsi0) Downloading sequencer code... 374 instructions downloaded Jul 21 15:29:05 av2443 kernel: scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.19/3.2.4 Jul 21 15:29:05 av2443 kernel: <Adaptec AHA-294X Ultra2 SCSI host adapter> Jul 21 15:29:05 av2443 kernel: scsi : 1 host. Jul 21 15:29:05 av2443 kernel: (scsi0:0:0:0) Synchronous at 80.0 Mbyte/sec, offset 31. Jul 21 15:29:05 av2443 kernel: Vendor: IBM Model: DNES-318350W Rev: SA30 Jul 21 15:29:05 av2443 kernel: Type: Direct-Access ANSI SCSI revision: 03 Jul 21 15:29:05 av2443 kernel: Detected scsi disk sda at scsi0, channel 0, id 0, lun 0 Jul 21 15:29:05 av2443 kernel: (scsi0:0:1:0) Synchronous at 20.0 Mbyte/sec, offset 15. Jul 21 15:29:05 av2443 kernel: Vendor: MICROP Model: 3391NS Rev: x43h Jul 21 15:29:05 av2443 kernel: Type: Direct-Access ANSI SCSI revision: 02 Jul 21 15:29:05 av2443 kernel: Detected scsi disk sdb at scsi0, channel 0, id 1, lun 0 Jul 21 15:29:05 av2443 atd: atd startup succeeded Jul 21 15:29:05 av2443 kernel: (scsi0:0:3:0) Synchronous at 10.0 Mbyte/sec, offset 15. Jul 21 15:29:05 av2443 kernel: Vendor: PLEXTOR Model: CD-ROM PX-20TS Rev: 1.00 Jul 21 15:29:05 av2443 kernel: Type: CD-ROM ANSI SCSI revision: 02 Jul 21 15:29:05 av2443 kernel: Detected scsi CD-ROM sr0 at scsi0, channel 0, id 3, lun 0 Jul 21 15:29:05 av2443 kernel: (scsi0:0:4:0) Synchronous at 10.0 Mbyte/sec, offset 8. Jul 21 15:29:05 av2443 kernel: Vendor: PLEXTOR Model: CD-R PX-R820T Rev: 1.03 Jul 21 15:29:05 av2443 kernel: Type: CD-ROM ANSI SCSI revision: 02 Jul 21 15:29:05 av2443 kernel: Detected scsi CD-ROM sr1 at scsi0, channel 0, id 4, lun 0 Jul 21 15:29:05 av2443 kernel: (scsi0:0:5:0) Synchronous at 5.0 Mbyte/sec, offset 15. Jul 21 15:29:05 av2443 kernel: Vendor: CONNER Model: CTT8000-S Rev: 1.17 Jul 21 15:29:05 av2443 kernel: Type: Sequential-Access ANSI SCSI revision: 02 Jul 21 15:29:05 av2443 kernel: Detected scsi tape st0 at scsi0, channel 0, id 5, lun 0 Jul 21 15:29:05 av2443 kernel: Uniform CDROM driver Revision: 2.55 Jul 21 15:29:05 av2443 kernel: sr1: scsi3-mmc drive: 20x/20x writer cd/rw xa/form2 cdda tray Jul 21 15:29:05 av2443 kernel: SCSI device sda: hdwr sector= 512 bytes. Sectors= 35843670 [17501 MB] [17.5 GB] Jul 21 15:29:05 av2443 kernel: sda: sda1 sda2 < sda5 sda6 sda7 sda8 sda9 sda10 > Jul 21 15:29:05 av2443 kernel: SCSI device sdb: hdwr sector= 512 bytes. Sectors= 17780058 [8681 MB] [8.7 GB] Jul 21 15:29:05 av2443 kernel: sdb: sdb1 sdb2 sdb3 Jul 21 15:29:05 av2443 kernel: scsi : 1 host. Matthew Zaleski
