Re: 2.5.69 and ide-floppy errors

[Jens Axboe <axboe@suse.de>]

On Sun, May 11 2003, Bartlomiej Zolnierkiewicz wrote:
> 
> On Sun, 11 May 2003, Gregoire Favre wrote:
> 
> > On Sun, May 11, 2003 at 02:35:48PM +0200, Bartlomiej Zolnierkiewicz wrote:
> > >
> > > Hi,
> > >
> > > Don't compile TCQ support in.
> > > What do you have on hda and hdb?
> >
> > Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
> > ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> > ICH4: IDE controller at PCI slot 00:1f.1
> > ICH4: chipset revision 1
> > ICH4: not 100% native mode: will probe irqs later
> >     ide0: BM-DMA at 0xfc00-0xfc07, BIOS settings: hda:DMA, hdb:pio
> >     ide1: BM-DMA at 0xfc08-0xfc0f, BIOS settings: hdc:DMA, hdd:pio
> > hda: IC35L120AVVA07-0, ATA DISK drive
> > hdb: IOMEGA ZIP 250 ATAPI, ATAPI FLOPPY drive
> > hda: tagged command queueing enabled, command queue depth 8
> > ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> > hdc: SONY DVD RW DRU-500A, ATAPI CD/DVD-ROM drive
> > ide1 at 0x170-0x177,0x376 on irq 15
> > hda: host protected area => 1
> > hda: 241254720 sectors (123522 MB) w/1863KiB Cache, CHS=239340/16/63, UDMA(100)
> >  /dev/ide/host0/bus0/target0/lun0: p1 p2 p3 p4 < p5 p6 >
> > hdc: ATAPI 16X DVD-ROM DVD-R CD-R/RW drive, 8192kB Cache, UDMA(33)
> >
> > I'll recompil without TCQ: thank you very much for the info!!!
> 
> Thanks for report.
> 
> Jens, can you comment on this issue. TCQ shouldn't be enabled
> when there is other device on a channel?

Correct, that needs a check. It should work, but is far from optimal
both from the software and hardware point of view... So I'd much rather
just keep TCQ enabled only on a single drive on a channel. That way I
don't have to deal with the ide tcq stupidities.

-- 
Jens Axboe