From: "Petr Vandrovec" <VANDROVE@vc.cvut.cz>
Organization: CC CTU Prague
To: Jeffrey Baker <jwbaker@acm.org>
Date: Sat, 31 May 2003 01:20:45 +0200
MIME-Version: 1.0
Content-type: text/plain; charset=US-ASCII
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Subject: Re: Different geometry settings for identical drives
Cc: linux-kernel@vger.kernel.org
Message-ID: <306584240A9@vcnet.vc.cvut.cz>
Sender: linux-kernel-owner@vger.kernel.org

On 30 May 03 at 15:46, Jeffrey Baker wrote:

> hda: host protected area => 1
> hda: setmax LBA 234441648, native  234375000
> hda: 234375000 sectors (120000 MB) w/8192KiB Cache, CHS=232514/16/63, UDMA(100)
> hdc: attached ide-disk driver.
> hdc: host protected area => 1
> hdc: setmax LBA 234441648, native  234375000
> hdc: 234375000 sectors (120000 MB) w/8192KiB Cache, CHS=232514/16/63, UDMA(100)
> hdd: attached ide-cdrom driver.
> hdd: ATAPI 24X CD-ROM drive, 128kB Cache, UDMA(33)
> 
> The result is that hda works fine but hdc doesn't.  When I try to mke2fs
> on the latter I see:
> 
> hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> hdc: dma_intr: error=0x10 { SectorIdNotFound }, LBAsect=234441583, sector=232343808
> 
> You can see that LBAsect (234441583) is higher than the "native" sectors
> quoted by the kernel (234375000, difference 66583 sectors).  Why are
> these two disks being addressed differently?  

As far as I can tell, it has nothing to do with disk geometry.

Someone just cut couple of sectors at the end from disk, you compiled
your kernel without CONFIG_IDEDISK_STROKE, but still kernel for some
reason reports block size as if idedisk_set_max_address() was invoked.

I do not see how this could happen with 2.4.21-rc3... Can you recheck
that you are using 2.4.21-rc3 without any additional patches?
                                            Petr Vandrovec
                                            vandrove@vc.cvut.cz
                                            

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