From: Steven_Snyder@3com.com
To: linux-kernel@vger.kernel.org
Message-ID: <88256990.0062E87E.00@hqoutbound.ops.3com.com>
Date: Tue, 7 Nov 2000 11:58:48 -0600
Subject: Linux v2.2.17: IDE disk error on Compact Flash device
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Sender: linux-kernel-owner@vger.kernel.org


Hello.

When attempting to boot Linux kernel v2.2.17 from a Compact Flash (CF) device I
am getting the errors shown below.  This CF device is in a PCMCIA form factor
and is the Master device on the secondary IDE controller

Before we get to the errors, though, a little background.  I can reproduce this
boot error on 2 different systems, and have seen the same error messages
(non-booting) on a 3rd system.  For both boot systems the CF device is the only
IDE device and is the Master on the secondary IDE controller (/dev/hdc).  For
the non-booting system the device is in a PCMCIA slot (/dev/hde).

This is what I see at boot time:

ide1 at 0x170-0x177,0x376 on irq 15
hdc: SanDisk SDCFB-128, 122MB /w1kB Cache, CHS=980/8/32
Partition check:
 hdc: hdc1 hdc2
 hdc: hdc1 hdc2
hdc: drive_cmd: status=0x51 { DriveReady SeekComplete Error }
hdc: drive_cmd: error=0x04 { DriveStatusError }
 hdc: hdc1 hdc2
 hdc: hdc1 hdc2
[MS-DOS FS Rel. 12 FAT 16 check=n,conv=b,uid=0,umask=022,bmap]
[me=0x1,cs=0x1240,#f=191,fs=34616,fl=1699280,ds=327153000,de=1536,data=327153120,se=185,ts=1015022771,ls=20487,rc=0,fc=4294967295]
Transaction block size = 512
UMSDOS: msdos_read_super failed mount aborted
 hdc: hdc1 hdc2
[MS-DOS FS Rel. 12 FAT 16 check=n,conv=b,uid=0,umask=022,bmap]
[me=0x1,cs=0x1240,#f=191,fs=34616,fl=1699280,ds=327153000,de=1536,data=327153120,se=185,ts=1015022771,ls=20487,rc=0,fc=4294967295]
Transaction block size = 512
Kernel panic: VFS: Unable to mount root fs on 16:00

That's it.  I've listed the (U)MSDOS complaints for completeness, but as I get
the same drive_cmd messages when simply inserting the device in a PCMCIA slot
(that is, before attempting to mount any filesystem), I don't think that it is a
factor.

This is definately an OS issue.  I've booted many OSes (DOS, Win95, VxWorks,
LynxOS) from this same configuration (CF = IDE1/Master as the sole IDE device)
and have seen no complaints like the ones shown above.

So... what can I do to work around this problem?  Thank you.


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