Knoppix hard-disk intall and ZIP drive??

[Ish Rattan]

>Thanks for helping me learn. When you feel you & I have taught each other all we know, you >might want to launch a new thread, to encourage someone else to contribute.
>
>I haven't yet heard if boot: knoppix26 hdc=ide-cd hdd=ide-cd
>made your PATAPI Zip appear in: plscsi /dev/hd[abcd]

Just before I give up, here is the last 50 lines of /var/log/syslog (with hdc=scsi hdd=scsi and
and attempt at mount /dev/sda4 /mnt/test):
---
May 28 11:51:33 tigaon kernel: SCSI device sda: 196608 512-byte hdwr sectors (101 MB)
May 28 11:51:33 tigaon kernel: sda: Write Protect is off
May 28 11:51:33 tigaon kernel: sda: Mode Sense: 45 00 00 08
May 28 11:51:33 tigaon kernel: SCSI device sda: drive cache: write back
May 28 11:51:33 tigaon kernel: SCSI device sda: 196608 512-byte hdwr sectors (101 MB)
May 28 11:51:33 tigaon kernel: sda: Write Protect is off
May 28 11:51:33 tigaon kernel: sda: Mode Sense: 45 00 00 08
May 28 11:51:33 tigaon kernel: SCSI device sda: drive cache: write back
May 28 11:52:03 tigaon kernel: sda:hdd: DMA interrupt recovery
May 28 11:52:03 tigaon kernel: hdd: lost interrupt
May 28 11:52:03 tigaon kernel: ide-scsi: The scsi wants to send us more data than expected - discarding data
May 28 11:52:03 tigaon kernel: hdd: DMA disabled
May 28 11:52:03 tigaon kernel: hdd: ATAPI reset complete
May 28 11:52:23 tigaon kernel: scsi: Device offlined - not ready after error recovery: host 1 channel 0 id 0 lun 0
May 28 11:52:23 tigaon kernel: SCSI error : <1 0 0 0> return code = 0x6000000
May 28 11:52:23 tigaon kernel: end_request: I/O error, dev sda, sector 0
May 28 11:52:23 tigaon kernel: Buffer I/O error on device sda, logical block 0
May 28 11:52:23 tigaon kernel: scsi1 (0:0): rejecting I/O to offline device
May 28 11:52:23 tigaon kernel: Buffer I/O error on device sda, logical block 0
May 28 11:52:23 tigaon kernel: ldm_validate_partition_table(): Disk read failed.
May 28 11:52:23 tigaon kernel: scsi1 (0:0): rejecting I/O to offline device
May 28 11:52:23 tigaon kernel: Buffer I/O error on device sda, logical block 0
May 28 11:52:23 tigaon kernel: unable to read partition table
---

Does it say anything extra?

-ishwar

[p.lavarre]

Yes, this is great stuff.

I'm confident, if we dig long enough, we can discover how to patch the kernel to workaround specifically the evil:

kernel: sda: Mode Sense: 45 00 00 08
kernel: SCSI device sda: drive cache: write back
kernel: sda:hdd: DMA interrupt recovery
kernel: hdd: lost interrupt
kernel: ide-scsi: The scsi wants to send us more data than expected - discarding data
kernel: hdd: DMA disabled
kernel: hdd: ATAPI reset complete
kernel: scsi: Device offlined - not ready after error recovery: host 1 channel 0 id 0 lun 0
kernel: SCSI error : <1 0 0 0> return code = 0x6000000

How hard do you want to work?

Are you willing to learn how to substitute an sd_mod.ko you build yourself for what Knoppix delivered to you?

If yes, then ...

Maybe first we should find this "sda: Mode Sense: 45 00 00 08" message in the kernel source.

http://lxr.linux.no/search?v=2.6.5&string=Mode+Sense
suggests:

http://lxr.linux.no/source/drivers/s...?v=2.6.5#L1154
printk(KERN_DEBUG "%s: Mode Sense: %02x %02x %02x %02x\n",
diskname, buffer[0], buffer[1], buffer[2], buffe

Looks like that messages prints after the failure of the third try in sd.sd_read_write_protect_flag i.e. a notoriously incompatible area of linux-scsi.

The linux-scsi source code is consciously written in a style that makes the plain hex difficult to infer. We need to discover how to turn SCSI tracing on, so we can see the CDB, status, etc.