On Sun, 4 Jan 2004, Christian Pelealu wrote:
> I don't have sd_mod as a module for both 2.4.23 & 2.6.1-rc1. It's
> compiled in the kernel. This is because I have 2 real SCSI harddrives:
>
>
> scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.36
> <Adaptec aic7899 Ultra160 SCSI adapter>
> aic7899: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs
>
> (scsi0:A:0):
> 160.000MB/s transfers (80.000MHz DT, offset 63, 16bit)
> (scsi0:A:1): 160.000MB/s transfers (80.000MHz DT, offset 63, 16bit)
> Vendor: SEAGATE Model: ST336605LW Rev: 0003
> Type: Direct-Access ANSI SCSI revision: 03
> Vendor: SEAGATE Model: ST336605LW Rev: 0002
> Type: Direct-Access ANSI SCSI revision: 03
> scsi1 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.36
> <Adaptec aic7899 Ultra160 SCSI adapter>
> aic7899: Ultra160 Wide Channel B, SCSI Id=7, 32/253 SCBs
>
>
> The kernel option for 2.4.23 is more or less the same with 2.6. It's
> just that 2.6 has a newer aic7xxx driver(?) than 2.4's. Do you think
> this has to do with usb-storage-aic7xxx interaction ?
What interaction? I don't think aic7xxx has anything to do with this at
all. I think it's weird, nonstandard behavior on the part of your camera.
> I did echo 'MATSHITA:DMC-LC40:0x3000' > /proc/scsi/device_info.
> It's still the same.
Okay, try using this patch under 2.6 instead. It will remove entirely the
TEST UNIT READY command that's causing all your problems. While I don't
recommend doing that as a rule, it will be interesting to see if it makes
a difference for your camera.
Alan Stern
--- 2.6/drivers/scsi/sd.c.orig Mon Nov 10 10:26:50 2003
+++ 2.6/drivers/scsi/sd.c Sun Jan 4 15:30:59 2004
@@ -606,9 +606,13 @@
* by sd_spinup_disk() from sd_revalidate_disk(), which happens whenever
* sd_revalidate() is called.
*/
+#if 0
retval = -ENODEV;
if (scsi_block_when_processing_errors(sdp))
retval = scsi_ioctl(sdp, SCSI_IOCTL_TEST_UNIT_READY, NULL);
+#else
+ retval = 0;
+#endif
/*
* Unable to test, unit probably not ready. This usually
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