Messages in this thread | ![/](/images/icornerl.gif) | | Date | Thu, 4 Dec 2003 17:09:12 +0100 | From | Kristian Peters <> | Subject | Re: 2.4.23 : timeouts and lost interrupts using IDE-SCSI |
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Jimmie Mayfield <mayfield+kernel@sackheads.org> schrieb: > Since upgrading from 2.4.20 to 2.4.23, I can no longer mount my ATAPI CDROM and > CDR/W drives using IDE-SCSI. Attempts to mount those drives result in > lost interrupts messages:
That is normal and intended. You should see some "dma disabled" messages in your kernel-log (unless if you haven't enabled "DMA only for disks"). ATAPI/cdrom does not work reliable with DMA on 2.4. I think Andre Hedrick has switched that off after 2.4.20. If you really want ide-scsi with dma you should try 2.6.
This is how it should like:
SCSI subsystem driver Revision: 1.00 hdb: attached ide-scsi driver. hdb: DMA disabled <------ hdd: attached ide-scsi driver. hdd: DMA disabled <------ scsi0 : SCSI host adapter emulation for IDE ATAPI devices Vendor: COMPAQ Model: CD-ROM LTN485 Rev: KQA4 Type: CD-ROM ANSI SCSI revision: 02 Vendor: HP Model: CD-Writer+ 9100b Rev: 1.06 Type: CD-ROM ANSI SCSI revision: 02
So you should disable that option in your config or if you prefer using hdparm try it with "-d0 /dev/cdrom".
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