Sorry for the previous HTML-formatted e-mails. This is now corrected. The first thing to realize is that this system only has three devices on the actual scsi bus to this adapter: 7 - adapter card 3 - Exabyte 1x10 autoloader 6 - Exabyte VXA-2 tape drive I only need 20 Mbps since the maximum speed of the VXA-2 tape drive is 6 Mbps uncomressed or 12 Mbps compressed (estimated since depends on compressibility). Looking at the backup reports I am getting very close to 6 Mbps performance. I looked at the bios settings for this device and it appears to be set as near as possible to a narrow device: 1) The bios is entered by typing ctrl-A during the Adaptec bios output console while booting. All 15 scsi IDs show up on the console. Each device can be set separately. 2) The entries were initially set as follows: sync transfer 20 Mbps, scsi IDs 0-7 a-sync transfer, scsi IDs 8-15 initiate wide negotiation - NO - 0-15 enable auto-disconnect - YES 0-15 send start to unit - YES 0-7, NO 8-15 enable write back cache - YES 0-7, NO 8-15 bios multiple LUN - NO - 0-15 include in bios scan - YES 0-7, NO 8-15 3) I also tried one change to these same entries (which is where it is now): sync transfer 20 Mbps, scsi IDs 0-15 enable auto-disconnect - NO 0-7, YES 8-15 4) I also tried booting with all devices in async mode, and it also failed to find the media changer. 5) The narrow bus can be verified by the maximum sync transfer available is 160 Mbps in wide setting and only 40 Mbps in the narrow setting. 6) A separate screen shows two entries LVD/SE connector automatic Fast/Ultra-SE connector automatic These could be changed to enable or disable, but I left as automatic. 7) The bios version is 3.10.0 which is the latest available from Adaptec and dated 30-May-2001. 8) I booted up under 2.6.18.8 and the old aic7xxx driver which is working, and the 2.6.22.1 and the new aic7xxx driver which is not working. 9) the output from the commands you asked for are shown below for the 2.6.22.1 kernel. They indicate parity errors on the changer at scsi id=3. Also, when booting up under 2.6.18.8, the linux media changer scsi device works and initializes; when booting up under 2.6.22.1, it does not; probably because of the same parity errors ? target0:0:3: Beginning Domain Validation target0:0:3: asynchronous target0:0:3: FAST-20 WIDE SCSI 40.0 MB/s ST (50 ns, offset 32) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x1a6) SCSIRATE(0x95) (scsi0:A:3:0): parity error detected in Command phase. SEQADDR(0x1a7) SCSIRATE(0x95) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x1a7) SCSIRATE(0x95) (scsi0:A:3:0): parity error detected in Command phase. SEQADDR(0x1a7) SCSIRATE(0x95) target0:0:3: Domain Validation detected failure, dropping back target0:0:3: FAST-20 WIDE SCSI 33.4 MB/s ST (60 ns, offset 32) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x1a6) SCSIRATE(0x96) (scsi0:A:3:0): parity error detected in Command phase. SEQADDR(0x1a7) SCSIRATE(0x96) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x1a6) SCSIRATE(0x96) (scsi0:A:3:0): parity error detected in Command phase. SEQADDR(0x1a7) SCSIRATE(0x96) target0:0:3: Domain Validation detected failure, dropping back target0:0:3: FAST-10 WIDE SCSI 20.0 MB/s ST (100 ns, offset 32) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x1a6) SCSIRATE(0x98) (scsi0:A:3:0): parity error detected in Command phase. SEQADDR(0x1a7) SCSIRATE(0x98) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x1a6) SCSIRATE(0x98) (scsi0:A:3:0): parity error detected in Command phase. SEQADDR(0x1a7) SCSIRATE(0x98) target0:0:3: Domain Validation detected failure, dropping back target0:0:3: FAST-10 WIDE SCSI 13.6 MB/s ST (148 ns, offset 32) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x1a6) SCSIRATE(0x9a) (scsi0:A:3:0): parity error detected in Command phase. SEQADDR(0x1a7) SCSIRATE(0x9a) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x1a6) SCSIRATE(0x9a) (scsi0:A:3:0): parity error detected in Command phase. SEQADDR(0x1a7) SCSIRATE(0x9a) target0:0:3: Domain Validation detected failure, dropping back target0:0:3: wide asynchronous (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x69) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x6b) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x85) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x85) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x85) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x85) SCSIRATE(0x80) target0:0:3: Domain Validation detected failure, dropping back (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x69) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x6b) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x1a7) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x1a7) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x54) SCSIRATE(0x80) target0:0:3: Domain Validation detected failure, dropping back (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x69) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x1a7) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x1a7) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x1a7) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x1a7) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x6b) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x1a7) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x1a7) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x1a7) SCSIRATE(0x80) target0:0:3: Domain Validation detected failure, dropping back (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x69) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x83) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Data-in phase. SEQADDR(0x1a7) SCSIRATE(0x80) (scsi0:A:3:0): parity error detected in Command phase. SEQADDR(0x1a7) SCSIRATE(0x80) target0:0:3: Domain Validation Failure, dropping back to Asynchronous target0:0:3: Domain Validation skipping write tests target0:0:3: Ending Domain Validation - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
