Re: Kernel 2.6.18 and above

* Re: Kernel 2.6.18 and above
       [not found]       ` <46286D36.5090609@users.sourceforge.net>
@ 2007-04-20  8:30         ` Benjamin Herrenschmidt
  2007-04-20  9:55           ` Mike
  2007-04-20 20:41           ` Bartlomiej Zolnierkiewicz
  0 siblings, 2 replies; 5+ messages in thread
From: Benjamin Herrenschmidt @ 2007-04-20  8:30 UTC (permalink / raw)
  To: Mike; +Cc: B.Zolnierkiewicz, list linux-ide

I'm CC'ing linux-ide... looks like the disk which you say is 20GB is
misdetected by the IDE layer as being 2GB.

Ok, so we have:

> >> Probing IDE interface ide0...
> >> hda: WDC WD800JB-00FMA0, ATA DISK drive
> >> hdb: IC35L020AVVN07-0, ATA DISK drive
> >> hda: Enabling Ultra DMA 4
> >> hdb: Enabling Ultra DMA 4
> >> ide0 at 0xf139c000-0xf139c007,0xf139c160 on irq 19
> >> ide1: Found Apple KeyLargo ATA-3 controller, bus ID 0, irq 20
> >> Probing IDE interface ide1...
> >> hdc: PIONEER DVD-RW DVR-111D, ATAPI CD/DVD-ROM drive
> >> hdd: IOMEGA ZIP 250 ATAPI, ATAPI FLOPPY drive
> >> hdc: Enabling MultiWord DMA 2
> >> ide1 at 0xf139e000-0xf139e007,0xf139e160 on irq 20
> >> ide2: Found Apple KeyLargo ATA-3 controller, bus ID 1, irq 21
> >> Probing IDE interface ide2...
> >> Probing IDE interface ide2...
> >> hda: max request size: 128KiB
> >> hda: 156301488 sectors (80026 MB) w/8192KiB Cache, CHS=65535/16/63, UDMA(66)
> >> hda: cache flushes supported
> >>  hda: [mac] hda1 hda2 hda3 hda4 hda5 hda6 hda7 hda8 hda9 hda10 hda11 hda12 hda13
> >> hdb: max request size: 128KiB
> >> hdb: 4128768 sectors (2113 MB) w/1863KiB Cache, CHS=4096/16/63, UDMA(66)

Here the drive claims to be 2GB, not 20GB (or is detected as such).

> /dev/hdb
>         #                    type name                length   base    ( 
> size )  system
> /dev/hdb1     Apple_partition_map Apple                   63 @ 1       ( 
> 31.5k)  Partition map
> /dev/hdb2          Apple_Driver43 Macintosh               56 @ 64      ( 
> 28.0k)  Driver 4.3
> /dev/hdb3          Apple_Driver43 Macintosh               56 @ 120     ( 
> 28.0k)  Driver 4.3
> /dev/hdb4        Apple_Driver_ATA Macintosh               56 @ 176     ( 
> 28.0k)  Unknown
> /dev/hdb5        Apple_Driver_ATA Macintosh               56 @ 232     ( 
> 28.0k)  Unknown
> /dev/hdb6          Apple_FWDriver Macintosh              512 @ 288     
> (256.0k)  Unknown
> /dev/hdb7      Apple_Driver_IOKit Macintosh              512 @ 800     
> (256.0k)  Unknown
> /dev/hdb8           Apple_Patches Patch Partition        512 @ 1312    
> (256.0k)  Unknown
> /dev/hdb9              Apple_Free                     262144 @ 1824    
> (128.0M)  Free space
> /dev/hdb10              Apple_HFS Apple_HFS_Untitled_2 39924976 @ 
> 263968  ( 19.0G)  HFS
> /dev/hdb11             Apple_Free                         16 @ 40188944 
> (  8.0k)  Free space
> 
> Block size=512, Number of Blocks=40188960
> DeviceType=0x0, DeviceId=0x0
> Drivers-
> 1: @ 64 for 23, type=0x1
> 2: @ 120 for 36, type=0xffff
> 3: @ 176 for 21, type=0x701
> 4: @ 232 for 34, type=0xf8ff

And here you can see that the partition map tries to use about 20GB...
so there is a discrepancy between what the partition map says and what
the IDE driver says. I suspect old kernel just ignores the later, while
newer kernels enforce the limit which causes your problem.

Bart, I'm a bit at lost as to why the device size would be misdetected,
do you have an idea ? Might be worth getting a dump of the ID block...
Mike, can you send us a dump of the binary file /proc/ide/hdb/identify ?

Ben.

^ permalink raw reply	[flat|nested] 5+ messages in thread