[Xen-bugs] [Bug 551] New: VFS: Cannot open root device - Unable to mount root fs on unknown-

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

block(3,69)
X-Bugzilla-Reason: AssignedTo

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=551

           Summary: VFS: Cannot open root device - Unable to mount root fs
                    on unknown-
                    block(3,69)
           Product: Xen
           Version: 3.0.1
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: blocker
          Priority: P2
         Component: Guest-OS
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: linuxale@xxxxxxxxx


Hi dear,
I'v a blocked problem on initial install of xen Guest Machine (DOM0 boot OK).

I'm using a gentoo distro with linux-2.6.12.6-xen-r2 and xen-3.0.1-r1 .
I followed this point to configure xen:
# DOMAIN 0 
XEN --->
  [*] Privileged Guest (domain 0)
  [*]  Block-device backend driver
  [*]  Network-device backend driver
  [ ] Block-device frontend driver
  [ ] Network-device frontend driver
  [ ]   Piplined transmitter (DANGEROUS)
  [*] Scrub memory before freeing it to Xen
      Processor Type (X86)  --->

Device Drivers --->
  Networking support --->
    Networking options --->
      [*] 802.1d Ethernet Bridging

make all
cp vmlinuz /boot/vmlinuz-2.6.x.y-xen0

## EDIT grub.conf
title  Xen 3.0.0 / Linux 2.6.12.5
root   (hd0,0)
kernel /xen.gz dom0_mem=98304
module /vmlinuz-2.6.12.5-xen0 root=/dev/md2

# DOMAIN U
XEN --->
  [ ] Privileged Guest (domain 0)
  [ ]  Block-device backend driver
  [ ]  Network-device backend driver
  [*] Block-device frontend driver
  [*] Network-device frontend driver
  [ ]   Piplined transmitter (DANGEROUS)
  [*] Scrub memory before freeing it to Xen
      Processor Type (X86)  --->


make all
cp vmlinuz /boot/vmlinuz-2.6.x.y-xenU

To try I used first of all ttylinux
http://prdownloads.sourceforge.net/xen/ttylinux-xen.bz2?download

# Edit the file /etc/xen/ttylinux
kernel = "/boot/vmlinuz-2.6-xenU"
memory = 64
name = "ttylinux"
nics = 1
ip = "1.2.3.4"
disk = ['file:/path/to/ttylinux/rootfs,sda1,w']
root = "/dev/sda1 ro"

With no success and then I try with a good document on debian
http://wiki.xensource.com/xenwiki/DebianDomU.

No success at all!
Fail with:
[65636.560724] VFS: Cannot open root device "hdb5" or unknown-block(3,69)
[65636.561452] Please append a correct "root=" boot option
[65636.561816] Kernel panic - not syncing: VFS: Unable to mount root fs on 
unknown-
block(3,69)

Looking the log I'v noted that in the guest machine xen don't recognize well the
ide controller:
DOMU
[65630.655770] Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
[65630.656223] ide: Assuming 50MHz system bus speed for PIO modes; override 
with id
ebus=xx
[65630.658801] Registering block device major 3

DOM0
[    1.414031] ide: Assuming 33MHz system bus speed for PIO modes; override with
idebus=xx
[    1.415995] ICH2: IDE controller at PCI slot 0000:00:1f.1
[    1.416990] ICH2: chipset revision 18
[    1.417932] ICH2: not 100% native mode: will probe irqs later
[    1.418904]     ide0: BM-DMA at 0xfc00-0xfc07, BIOS settings: hda:DMA, 
hdb:pio
[    1.420946]     ide1: BM-DMA at 0xfc08-0xfc0f, BIOS settings: hdc:DMA, 
hdd:pio
[    1.422871] Probing IDE interface ide0...
[    1.720245] hda: WDC WD204EB-71CPF0, ATA DISK drive
[    2.441018] ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
[    2.442102] Probing IDE interface ide1...
[    3.220242] hdc: SR243T, ATAPI CD/DVD-ROM drive
[    3.941089] ide1 at 0x170-0x177,0x376 on irq 15
[    3.942679] Probing IDE interface ide2...
[    4.540016] Probing IDE interface ide3...
[    5.140014] Probing IDE interface ide4...
[    5.740015] Probing IDE interface ide5...
[    6.340124] hda: max request size: 128KiB
[    6.364203] hda: Host Protected Area detected.
[    6.364206]  current capacity is 39851760 sectors (20404 MB)
[    6.364208]  native  capacity is 39852288 sectors (20404 MB)
[    6.369337] hda: Host Protected Area disabled.
[    6.370308] hda: 39852288 sectors (20404 MB) w/2048KiB Cache,
CHS=39536/16/63, UDMA(100)
[    6.372223] hda: cache flushes not supported
[    6.373317]  /dev/ide/host0/bus0/target0/lun0: p1 p2 p3 < p5 >

I attach the full logs!

-- 
Configure bugmail: 
http://bugzilla.xensource.com/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.

_______________________________________________
Xen-bugs mailing list
Xen-bugs@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-bugs