Red Hat Bugzilla – Bug 435903
Cannot find root file system! on pcmcia CDROM drive
Last modified: 2013-01-09 23:35:25 EST
Description of problem:
the LiveCD boots the kernel okay but then it can't find the root file system
(which is, presumably, on the CD) - so i guess it can't find the CD drive.
Version-Release number of selected component (if applicable):
fedora 9 alpha LiveCD i386
there's plenty of noise about this in various forums. looks like maybe it used
to work around kernel 2.6.8. i saw a post saying that ubuntu warty worked.
Which actual hardware is this? And does the PCMCIA cd drive work in other cases
on an already installed system?
hardware is a toshiba portege P2000. (about 5 years old). the CD drive works
well enough to boot the kernel.
the drive works fine on a running fedora 8 on the same laptop model.
can i get more useful information from that running system? what would be the
most helpful stuff i can get?
with the drive plugged in on running f8:
lspci has the "ToPIC100 PCI to Cardbus Bridge with ZV Support", using driver
yenta_cardbus. lspci -n calls it 1179:0617 (rev 32)
pcmcia.prod_id1 = 'FREECOM'
pcmcia.prod_id2 = 'PCCARD-IDE'
pcmcia.prod_id3 = 'REV836'
which has a child scsi_host with a child:
info.linux.driver = 'sr'
scsi.model = 'CD-224E'
scsi.vendor = 'TEAC'
on insert the system log gets the following:
kernel: Driver 'sr' needs updating - please use bus_type methods
which appears on the screen just before the LiveCD fails.
lsmod contains sr_mod, cdrom and pata_pcmcia.
hope that's of some use. :-)
Added some bits so that the right modules should get pulled into the live initrd
and should be testable with F9 beta. Thanks!
w00t! here come's the beta :-) looks like all the modules are available,
thanks for that :-D, ... but the system doesn't know what to do with them, so
we get the same result.
here's what goes in /var/log/messages when i insert the pcmcia card with a CD in
the drive on fedora 8:
Mar 25 20:24:47 localhost kernel: pccard: PCMCIA card inserted into slot 1
Mar 25 20:24:47 localhost kernel: cs: memory probe 0xa0000000-0xa0ffffff:
Mar 25 20:24:47 localhost kernel: pcmcia: registering new device pcmcia1.0
Mar 25 20:24:49 localhost kernel: scsi2 : pata_pcmcia
Mar 25 20:24:49 localhost kernel: ata3: PATA max PIO0 cmd 0x140 ctl 0x14e irq 3
Mar 25 20:24:49 localhost kernel: ata3.00: ATAPI: CD-224E, 1.7A, max UDMA/33
Mar 25 20:24:49 localhost kernel: ata3.00: configured for PIO0
Mar 25 20:24:49 localhost kernel: isa bounce pool size: 16 pages
Mar 25 20:24:49 localhost kernel: scsi 2:0:0:0: CD-ROM TEAC
CD-224E 1.7A PQ: 0 ANSI: 5
Mar 25 20:24:49 localhost kernel: scsi 2:0:0:0: Attached scsi generic sg1 type 5
Mar 25 20:24:50 localhost kernel: Driver 'sr' needs updating - please use
Mar 25 20:24:50 localhost kernel: sr0: scsi3-mmc drive: 24x/24x cd/rw xa/form2
Mar 25 20:24:50 localhost kernel: Uniform CD-ROM driver Revision: 3.20
Mar 25 20:25:01 localhost hald: mounted /dev/sr0 on behalf of uid 500
Mar 25 20:25:01 localhost gnome-keyring-daemon: adding removable location:
volume_label_Fedora_9_Beta_i686_20080319 at /media/Fedora-9-Beta-i686-20080319
i'll try it again and see if i can mount manually from the command line.
booting from the fedora 9 beta live cd you get to the command prompt with no root.
removing and inserting the card elicits the "pccard: PCMCIA card inserted into
slot 1" (and matching 'ejected from') message.
so the first missing message is:
cs: memory probe 0xa0000000-0xa0ffffff: excluding 0xa0000000-0xa00fffff
maybe we need another module? or some hotplug magic? or something.
Changing version to '9' as part of upcoming Fedora 9 GA.
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