SCSI disk not detected anymore

["A.J. Werkman" <werkman worldonline nl>]

On my redhat5.0 system I have an adaptec 2940 SCSI-controler with a CD-R
and a harddisk attached. When I had the 2.0.33 kernel installed both the
CD-R and hdisk were detected on startup. After I upgraded the kernel to
2.0.35 the harddisk is not detected anymore. I included the relevant parts
of the starup messages here.

Now I wonder, does the new kernel or SCSI driver not support this disk
anymore or do I have to configure somthing in relation to the SCSI driver
in a different way to let it find the hdisk again? Or is there something
else that I haven't thought about?

------ linux 2.0.33 -----
aic7xxx: <Adaptec AHA-2940A Ultra SCSI host adapter> at PCI 9
aic7xxx: BIOS enabled, IO Port 0x6400, IO Mem 0xe4000000, IRQ 9, Revision C
aic7xxx: Single Channel, SCSI ID 7, 3/3 SCBs, QFull 8, QMask 0xf
scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 4.1.1/3.2.1
scsi : 1 host.
scsi0: Scanning channel A for devices.
  Vendor: PHILIPS   Model: CDD2600           Rev: 1.07
  Type:   CD-ROM                             ANSI SCSI revision: 02
Detected scsi CD-ROM sr0 at scsi0, channel 0, id 4, lun 0
  Vendor: IBM       Model: DSAS-3360     !a  Rev: S47Y
  Type:   Direct-Access                      ANSI SCSI revision: 02
Detected scsi disk sda at scsi0, channel 0, id 6, lun 0
scsi : detected 1 SCSI cdrom 1 SCSI disk total.
SCSI device sda: hdwr sector= 512 bytes. Sectors= 712704 [348 MB] [0.3 GB]
------ linux 2.0.35 -----
(scsi0) <Adaptec AHA-2940A Ultra SCSI host adapter> found at PCI 9/0
(scsi0) Narrow Channel, SCSI ID=7, 3/255 SCBs
(scsi0) BIOS enabled, IO Port 0x6400, IRQ 9
(scsi0) IO Memory at 0xe4000000, MMAP Memory at 0x0
(scsi0) Resetting channel
(scsi0) Downloading sequencer code... 413 instructions downloaded
scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.0.19/3.2.4
       <Adaptec AHA-2940A Ultra SCSI host adapter>
scsi : 1 host.
(scsi0:0:-1:-1) Scanning channel for devices.
  Vendor: PHILIPS   Model: CDD2600           Rev: 1.07
  Type:   CD-ROM                             ANSI SCSI revision: 02
Detected scsi CD-ROM sr0 at scsi0, channel 0, id 4, lun 0
scsi : detected 1 SCSI cdrom total.

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Regards, Koos Werkman.