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IDE hard drives & DMA



Hello,
	I know there was rewrite of a lot drivers regarding hard drives
due to a coruption problem.  What if you move the cdrom to secondary slave
and the last hard drive to secondary master.

I hope thats a help,
Anthony

On Tue, 10 Aug 1999, Brian Conway wrote:

> I have a multitude of IDE and SCSI disks on one box of mine, and recent ran
> into a problem after upgrading to the 2.2.11 kernel.  One of my 3 IDE drives
> will no longer initialize with DMA enabled, and this causes a performance
> issue.  This problem never showed up in the 2.2.5 or 2.2.10 releases.  Here
> are the partial contents of /var/log/dmesg on my rh6 box:
> 
> <snip>
> hda: Maxtor 72004 AP, ATA DISK drive
> hdb: SAMSUNG WN321620A (2.16 GB), ATA DISK drive
> hdc: CRD-8160B, ATAPI CDROM drive
> hdd: WDC AC22500L, ATA DISK drive
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> ide1 at 0x170-0x177,0x376 on irq 15
> hda: Maxtor 72004 AP, 1916MB w/128kB Cache, CHS=3893/16/63, DMA
> hdb: SAMSUNG WN321620A (2.16 GB), 2060MB w/109kB Cache, CHS=4186/16/63, DMA
> hdd: WDC AC22500L, 2441MB w/256kB Cache, CHS=4960/16/63, (U)DMA
> hdc: ATAPI 16X CD-ROM drive, 128kB Cache
> ...
> Partition check:
>  sda: sda1 sda2
>  sdb: sdb1 sdb2
>  hda: hda1 hda2 hda3
>  hdb: [PTBL] [523/128/63] hdb1 hdb2
>  hdd:hdd: timeout waiting for DMA
> hdd: irq timeout: status=0x58 { DriveReady SeekComplete DataRequest }
> hdd: DMA disabled
> ide1: reset: success
>  hdd1 hdd2
> <snip>
> 
> I have never run into this before.  I'm curious where I can tell the hdd to
> use dma and any other configuration options I've deemed necessary.  I know
> hdparm can do some interesting stuff, but I'm curious as to why this is only
> showing up now (assuming it's not a big kernel bug).  Ideas?
> 
> Brian Conway
> dogbert at clue4all.net
> 
> Those who do not understand Unix are condemned to reinvent it, poorly.
>                 -- Henry Spencer
> 
> 
> 
> 
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