With linux kernel version 2.4.3 my SCSI CDROM-drive isn't longer recognized. With kernel version 2.4.2 all work fine. The kernel configuration didn't changed. I tried the following combination of Kernel sources and aic7xxx-drivers: kernel aic7xxx 2.4.2 5.2.0/5.2.1 worked 2.4.2-ac28 6.1.8 worked 2.4.3 6.1.5/6.1.8 didn't work here is the output from kernel boot (2.4.3/ 6.1.8): Mar 30 09:44:35 pcew80 Linux version 2.4.3 (root@pcew80) (gcc version 2.95.3 20010315 (Debian release)) #1 Fri Mar 30 09:24:22 CEST 2001 Mar 30 09:44:35 pcew80 BIOS-provided physical RAM map: Mar 30 09:44:35 pcew80 BIOS-e820: 0000000000000000 - 000000000009fc00 (usable) Mar 30 09:44:35 pcew80 BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved) Mar 30 09:44:35 pcew80 BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved) Mar 30 09:44:35 pcew80 BIOS-e820: 0000000000100000 - 0000000017ffd000 (usable) Mar 30 09:44:35 pcew80 BIOS-e820: 0000000017ffd000 - 0000000017fff000 (ACPI data) Mar 30 09:44:35 pcew80 BIOS-e820: 0000000017fff000 - 0000000018000000 (ACPI NVS) Mar 30 09:44:35 pcew80 BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved) Mar 30 09:44:35 pcew80 On node 0 totalpages: 98301 Mar 30 09:44:35 pcew80 zone(0): 4096 pages. Mar 30 09:44:35 pcew80 zone(1): 94205 pages. Mar 30 09:44:35 pcew80 zone(2): 0 pages. Mar 30 09:44:35 pcew80 Kernel command line: BOOT_IMAGE=l ro root=801 ramdisk=0 Mar 30 09:44:35 pcew80 Initializing CPU#0 Mar 30 09:44:35 pcew80 Detected 334.096 MHz processor. Mar 30 09:44:35 pcew80 Console: colour VGA+ 80x50 Mar 30 09:44:35 pcew80 Calibrating delay loop... 666.82 BogoMIPS Mar 30 09:44:35 pcew80 Memory: 385012k/393204k available (762k kernel code, 7804k reserved, 246k data, 44k init, 0k highmem) Mar 30 09:44:35 pcew80 Dentry-cache hash table entries: 65536 (order: 7, 524288 bytes) Mar 30 09:44:35 pcew80 Buffer-cache hash table entries: 32768 (order: 5, 131072 bytes) Mar 30 09:44:35 pcew80 Page-cache hash table entries: 131072 (order: 7, 524288 bytes) Mar 30 09:44:35 pcew80 Inode-cache hash table entries: 32768 (order: 6, 262144 bytes) Mar 30 09:44:35 pcew80 VFS: Diskquotas version dquot_6.4.0 initialized Mar 30 09:44:35 pcew80 CPU: Before vendor init, caps: 0183f9ff 00000000 00000000, vendor = 0 Mar 30 09:44:35 pcew80 CPU: L1 I cache: 16K, L1 D cache: 16K Mar 30 09:44:35 pcew80 CPU: L2 cache: 512K Mar 30 09:44:35 pcew80 Intel machine check architecture supported. Mar 30 09:44:35 pcew80 Intel machine check reporting enabled on CPU#0. Mar 30 09:44:35 pcew80 CPU: After vendor init, caps: 0183f9ff 00000000 00000000 00000000 Mar 30 09:44:35 pcew80 CPU: After generic, caps: 0183f9ff 00000000 00000000 00000000 Mar 30 09:44:35 pcew80 CPU: Common caps: 0183f9ff 00000000 00000000 00000000 Mar 30 09:44:35 pcew80 CPU: Intel Pentium II (Deschutes) stepping 01 Mar 30 09:44:35 pcew80 Enabling fast FPU save and restore... done. Mar 30 09:44:35 pcew80 Checking 'hlt' instruction... OK. Mar 30 09:44:35 pcew80 POSIX conformance testing by UNIFIX Mar 30 09:44:35 pcew80 mtrr: v1.37 (20001109) Richard Gooch ([EMAIL PROTECTED]) Mar 30 09:44:35 pcew80 mtrr: detected mtrr type: Intel Mar 30 09:44:35 pcew80 PCI: PCI BIOS revision 2.10 entry at 0xf0750, last bus=1 Mar 30 09:44:35 pcew80 PCI: Using configuration type 1 Mar 30 09:44:35 pcew80 PCI: Probing PCI hardware Mar 30 09:44:35 pcew80 Unknown bridge resource 0: assuming transparent Mar 30 09:44:35 pcew80 PCI: Using IRQ router PIIX [8086/7110] at 00:04.0 Mar 30 09:44:35 pcew80 Limiting direct PCI/PCI transfers. Mar 30 09:44:35 pcew80 Linux NET4.0 for Linux 2.4 Mar 30 09:44:35 pcew80 Based upon Swansea University Computer Society NET3.039 Mar 30 09:44:35 pcew80 Initializing RT netlink socket Mar 30 09:44:35 pcew80 Starting kswapd v1.8 Mar 30 09:44:35 pcew80 pty: 256 Unix98 ptys configured Mar 30 09:44:35 pcew80 block: queued sectors max/low 255645kB/124573kB, 768 slots per queue Mar 30 09:44:35 pcew80 Real Time Clock Driver v1.10d Mar 30 09:44:35 pcew80 SCSI subsystem driver Revision: 1.00 Mar 30 09:44:35 pcew80 request_module[scsi_hostadapter]: Root fs not mounted Mar 30 09:44:35 pcew80 PCI: Found IRQ 10 for device 00:0b.0 Mar 30 09:44:35 pcew80 scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.1.8 Mar 30 09:44:35 pcew80 <Adaptec 2940A Ultra SCSI adapter> Mar 30 09:44:35 pcew80 aic7860: Single Channel A, SCSI Id=7, 3/255 SCBs Mar 30 09:44:35 pcew80 Mar 30 09:44:35 pcew80 Vendor: IBM Model: DDRS-34560 Rev: S71D Mar 30 09:44:35 pcew80 Type: Direct-Access ANSI SCSI revision: 02 Mar 30 09:44:35 pcew80 Detected scsi disk sda at scsi0, channel 0, id 0, lun 0 Mar 30 09:44:35 pcew80 (scsi0:A:0): 20.000MB/s transfers (20.000MHz, offset 15) Mar 30 09:44:35 pcew80 Vendor: IBM Model: DDRS-34560 Rev: S71D Mar 30 09:44:35 pcew80 Type: Direct-Access ANSI SCSI revision: 02 Mar 30 09:44:35 pcew80 Detected scsi disk sdb at scsi0, channel 0, id 1, lun 0 Mar 30 09:44:35 pcew80 (scsi0:A:1): 20.000MB/s transfers (20.000MHz, offset 15) Mar 30 09:44:35 pcew80 Vendor: IBM Model: DDRS-34560 Rev: S97B Mar 30 09:44:35 pcew80 Type: Direct-Access ANSI SCSI revision: 02 Mar 30 09:44:35 pcew80 Detected scsi disk sdc at scsi0, channel 0, id 3, lun 0 Mar 30 09:44:35 pcew80 (scsi0:A:3): 20.000MB/s transfers (20.000MHz, offset 15) Mar 30 09:44:35 pcew80 Vendor: HP Model: C1537A Rev: L812 Mar 30 09:44:35 pcew80 Type: Sequential-Access ANSI SCSI revision: 02 Mar 30 09:44:35 pcew80 (scsi0:A:4): 10.000MB/s transfers (10.000MHz, offset 15) Mar 30 09:44:35 pcew80 scsi0:0:0:0: Tagged Queuing enabled. Depth 253 Mar 30 09:44:35 pcew80 scsi0:0:1:0: Tagged Queuing enabled. Depth 253 Mar 30 09:44:35 pcew80 scsi0:0:3:0: Tagged Queuing enabled. Depth 253 Mar 30 09:44:35 pcew80 SCSI device sda: 8925000 512-byte hdwr sectors (4570 MB) Mar 30 09:44:35 pcew80 Partition check: Mar 30 09:44:35 pcew80 sda: sda1 sda2 < sda5 sda6 sda7 sda8 > Mar 30 09:44:35 pcew80 SCSI device sdb: 8925000 512-byte hdwr sectors (4570 MB) Mar 30 09:44:35 pcew80 sdb: sdb1 Mar 30 09:44:35 pcew80 SCSI device sdc: 8925000 512-byte hdwr sectors (4570 MB) Mar 30 09:44:35 pcew80 sdc: sdc1 Mar 30 09:44:35 pcew80 NET4: Linux TCP/IP 1.0 for NET4.0 here is the output from kernel boot (2.4.2-ac28/ 6.1.8): Mar 30 09:53:30 pcew80 Linux version 2.4.2-ac28 (root@pcew80) (gcc version 2.95.3 20010315 (Debian release)) #1 Thu Mar 29 13:02:56 CEST 2001 Mar 30 09:53:30 pcew80 BIOS-provided physical RAM map: Mar 30 09:53:30 pcew80 BIOS-e820: 0000000000000000 - 000000000009fc00 (usable) Mar 30 09:53:30 pcew80 BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved) Mar 30 09:53:30 pcew80 BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved) Mar 30 09:53:30 pcew80 BIOS-e820: 0000000000100000 - 0000000017ffd000 (usable) Mar 30 09:53:30 pcew80 BIOS-e820: 0000000017ffd000 - 0000000017fff000 (ACPI data) Mar 30 09:53:30 pcew80 BIOS-e820: 0000000017fff000 - 0000000018000000 (ACPI NVS) Mar 30 09:53:30 pcew80 BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved) Mar 30 09:53:30 pcew80 On node 0 totalpages: 98301 Mar 30 09:53:30 pcew80 zone(0): 4096 pages. Mar 30 09:53:30 pcew80 zone(1): 94205 pages. Mar 30 09:53:30 pcew80 zone(2): 0 pages. Mar 30 09:53:30 pcew80 Local APIC disabled by BIOS -- reenabling. Mar 30 09:53:30 pcew80 Found and enabled local APIC! Mar 30 09:53:30 pcew80 Kernel command line: BOOT_IMAGE=l ro root=801 ramdisk=0 Mar 30 09:53:30 pcew80 Initializing CPU#0 Mar 30 09:53:30 pcew80 Detected 334.099 MHz processor. Mar 30 09:53:30 pcew80 Console: colour VGA+ 80x50 Mar 30 09:53:30 pcew80 Calibrating delay loop... 666.82 BogoMIPS Mar 30 09:53:30 pcew80 Memory: 385048k/393204k available (762k kernel code, 7768k reserved, 198k data, 52k init, 0k highmem) Mar 30 09:53:30 pcew80 Dentry-cache hash table entries: 65536 (order: 7, 524288 bytes) Mar 30 09:53:30 pcew80 Buffer-cache hash table entries: 32768 (order: 5, 131072 bytes) Mar 30 09:53:30 pcew80 Page-cache hash table entries: 131072 (order: 7, 524288 bytes) Mar 30 09:53:30 pcew80 Inode-cache hash table entries: 32768 (order: 6, 262144 bytes) Mar 30 09:53:30 pcew80 VFS: Diskquotas version dquot_6.5.0 initialized Mar 30 09:53:30 pcew80 CPU: Before vendor init, caps: 0183fbff 00000000 00000000, vendor = 0 Mar 30 09:53:30 pcew80 CPU: L1 I cache: 16K, L1 D cache: 16K Mar 30 09:53:30 pcew80 CPU: L2 cache: 512K Mar 30 09:53:30 pcew80 Intel machine check architecture supported. Mar 30 09:53:30 pcew80 Intel machine check reporting enabled on CPU#0. Mar 30 09:53:30 pcew80 CPU: After vendor init, caps: 0183fbff 00000000 00000000 00000000 Mar 30 09:53:30 pcew80 CPU: After generic, caps: 0183fbff 00000000 00000000 00000000 Mar 30 09:53:30 pcew80 CPU: Common caps: 0183fbff 00000000 00000000 00000000 Mar 30 09:53:30 pcew80 CPU: Intel Pentium II (Deschutes) stepping 01 Mar 30 09:53:30 pcew80 Enabling fast FPU save and restore... done. Mar 30 09:53:30 pcew80 Checking 'hlt' instruction... OK. Mar 30 09:53:30 pcew80 POSIX conformance testing by UNIFIX Mar 30 09:53:30 pcew80 enabled ExtINT on CPU#0 Mar 30 09:53:30 pcew80 ESR value before enabling vector: 00000040 Mar 30 09:53:30 pcew80 ESR value after enabling vector: 00000000 Mar 30 09:53:30 pcew80 Using local APIC timer interrupts. Mar 30 09:53:30 pcew80 calibrating APIC timer ... Mar 30 09:53:30 pcew80 ..... CPU clock speed is 334.1116 MHz. Mar 30 09:53:30 pcew80 ..... host bus clock speed is 66.8220 MHz. Mar 30 09:53:30 pcew80 cpu: 0, clocks: 668220, slice: 334110 Mar 30 09:53:30 pcew80 CPU0<T0:668208,T1:334096,D:2,S:334110,C:668220> Mar 30 09:53:30 pcew80 mtrr: v1.39 (20010312) Richard Gooch ([EMAIL PROTECTED]) Mar 30 09:53:30 pcew80 mtrr: detected mtrr type: Intel Mar 30 09:53:30 pcew80 PCI: PCI BIOS revision 2.10 entry at 0xf0750, last bus=1 Mar 30 09:53:30 pcew80 PCI: Using configuration type 1 Mar 30 09:53:30 pcew80 PCI: Probing PCI hardware Mar 30 09:53:30 pcew80 Unknown bridge resource 0: assuming transparent Mar 30 09:53:30 pcew80 PCI: Using IRQ router PIIX [8086/7110] at 00:04.0 Mar 30 09:53:30 pcew80 Limiting direct PCI/PCI transfers. Mar 30 09:53:30 pcew80 Linux NET4.0 for Linux 2.4 Mar 30 09:53:30 pcew80 Based upon Swansea University Computer Society NET3.039 Mar 30 09:53:30 pcew80 Initializing RT netlink socket Mar 30 09:53:30 pcew80 Starting kswapd v1.8 Mar 30 09:53:30 pcew80 pty: 256 Unix98 ptys configured Mar 30 09:53:30 pcew80 block: queued sectors max/low 255669kB/124597kB, 768 slots per queue Mar 30 09:53:30 pcew80 Real Time Clock Driver v1.10d Mar 30 09:53:30 pcew80 SCSI subsystem driver Revision: 1.00 Mar 30 09:53:30 pcew80 request_module[scsi_hostadapter]: Root fs not mounted Mar 30 09:53:30 pcew80 PCI: Found IRQ 10 for device 00:0b.0 Mar 30 09:53:30 pcew80 scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.1.8 Mar 30 09:53:30 pcew80 <Adaptec 2940A Ultra SCSI adapter> Mar 30 09:53:30 pcew80 aic7860: Single Channel A, SCSI Id=7, 3/255 SCBs Mar 30 09:53:30 pcew80 Mar 30 09:53:30 pcew80 Vendor: IBM Model: DDRS-34560 Rev: S71D Mar 30 09:53:30 pcew80 Type: Direct-Access ANSI SCSI revision: 02 Mar 30 09:53:30 pcew80 (scsi0:A:0): 20.000MB/s transfers (20.000MHz, offset 15) Mar 30 09:53:30 pcew80 Vendor: IBM Model: DDRS-34560 Rev: S71D Mar 30 09:53:30 pcew80 Type: Direct-Access ANSI SCSI revision: 02 Mar 30 09:53:30 pcew80 (scsi0:A:1): 20.000MB/s transfers (20.000MHz, offset 15) Mar 30 09:53:30 pcew80 Vendor: TOSHIBA Model: CD-ROM XM-6201TA Rev: 1030 Mar 30 09:53:30 pcew80 Type: CD-ROM ANSI SCSI revision: 02 Mar 30 09:53:30 pcew80 (scsi0:A:2): 10.000MB/s transfers (10.000MHz, offset 15) Mar 30 09:53:30 pcew80 Vendor: IBM Model: DDRS-34560 Rev: S97B Mar 30 09:53:30 pcew80 Type: Direct-Access ANSI SCSI revision: 02 Mar 30 09:53:30 pcew80 (scsi0:A:3): 20.000MB/s transfers (20.000MHz, offset 15) Mar 30 09:53:30 pcew80 Vendor: HP Model: C1537A Rev: L812 Mar 30 09:53:30 pcew80 Type: Sequential-Access ANSI SCSI revision: 02 Mar 30 09:53:30 pcew80 (scsi0:A:4): 10.000MB/s transfers (10.000MHz, offset 15) Mar 30 09:53:30 pcew80 scsi0:0:0:0: Tagged Queuing enabled. Depth 253 Mar 30 09:53:30 pcew80 scsi0:0:1:0: Tagged Queuing enabled. Depth 253 Mar 30 09:53:30 pcew80 scsi0:0:3:0: Tagged Queuing enabled. Depth 253 Mar 30 09:53:30 pcew80 Attached scsi disk sda at scsi0, channel 0, id 0, lun 0 Mar 30 09:53:30 pcew80 Attached scsi disk sdb at scsi0, channel 0, id 1, lun 0 Mar 30 09:53:30 pcew80 Attached scsi disk sdc at scsi0, channel 0, id 3, lun 0 Mar 30 09:53:30 pcew80 SCSI device sda: 8925000 512-byte hdwr sectors (4570 MB) Mar 30 09:53:30 pcew80 Partition check: Mar 30 09:53:30 pcew80 sda: sda1 sda2 < sda5 sda6 sda7 sda8 > Mar 30 09:53:30 pcew80 SCSI device sdb: 8925000 512-byte hdwr sectors (4570 MB) Mar 30 09:53:30 pcew80 sdb: sdb1 Mar 30 09:53:30 pcew80 SCSI device sdc: 8925000 512-byte hdwr sectors (4570 MB) Mar 30 09:53:30 pcew80 sdc: sdc1 Mar 30 09:53:30 pcew80 NET4: Linux TCP/IP 1.0 for NET4.0 Mar 30 09:53:30 pcew80 IP Protocols: ICMP, UDP, TCP Mar 30 09:53:30 pcew80 IP: routing cache hash table of 4096 buckets, 32Kbytes Mar 30 09:53:30 pcew80 TCP: Hash tables configured (established 32768 bind 32768) -- Michael Reincke STN ATLAS Elektronik GmbH, Bremen (Germany) E-mail : [EMAIL PROTECTED] | mail: Sebaldsbrücker Heerstr 235 phone : +49-421-457-1606 | 28305 Bremen fax : +49-421-457-3913 | - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/