Hello, I've run into a very weird problem here. I'm using an external USB harddisk and when I plug it, it's correctly detected: usb 4-1: new high speed USB device using ehci_hcd and address 2 usb 4-1: new device found, idVendor=059b, idProduct=007e usb 4-1: new device strings: Mfr=56, Product=63, SerialNumber=88 usb 4-1: Product: Iomega HDD USB 2.0 Drive usb 4-1: Manufacturer: Iomega usb 4-1: SerialNumber: 03000B5AE5F4 usb 4-1: configuration #1 chosen from 1 choice SCSI subsystem initialized Initializing USB Mass Storage driver... scsi0 : SCSI emulation for USB Mass Storage devices usb-storage: device found at 2 usb-storage: waiting for device to settle before scanning usbcore: registered new interface driver usb-storage USB Mass Storage support registered. scsi 0:0:0:0: Direct-Access ST325082 3A PQ: 0 ANSI: 0 usb-storage: device scan complete sd 0:0:0:0: [sda] 488397168 512-byte hardware sectors (250059 MB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Mode Sense: 33 00 00 00 sd 0:0:0:0: [sda] Assuming drive cache: write through sd 0:0:0:0: [sda] 488397168 512-byte hardware sectors (250059 MB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Mode Sense: 33 00 00 00 sd 0:0:0:0: [sda] Assuming drive cache: write through sda: sda1 sd 0:0:0:0: [sda] Attached SCSI disk sd 0:0:0:0: Attached scsi generic sg0 type 0 If I try to mount /dev/sda1, I got the following error: # mount /dev/sda1 /mnt mount: /dev/sda1 already mounted or /mnt busy And it is really not mounted: # grep sda /proc/mounts # Looking at /proc/partitions I identified that /dev/sda1 is "the same" as /dev/dm-6: 8 0 244198584 sda 8 1 244196001 sda1 253 5 244198584 dm-5 253 6 244196001 dm-6 If I try to mount /dev/dm-6, it works: # mount /dev/dm-6 /mnt # cat /proc/mounts | grep mnt /dev/dm-6 /mnt ext3 rw,data=ordered 0 0 # If I unplug the disk and plug it again, it will be detected as /dev/sdb: usb 4-1: USB disconnect, address 2 usb 4-1: new high speed USB device using ehci_hcd and address 3 usb 4-1: new device found, idVendor=059b, idProduct=007e usb 4-1: new device strings: Mfr=56, Product=63, SerialNumber=88 usb 4-1: Product: Iomega HDD USB 2.0 Drive usb 4-1: Manufacturer: Iomega usb 4-1: SerialNumber: 03000B5AE5F4 usb 4-1: configuration #1 chosen from 1 choice scsi1 : SCSI emulation for USB Mass Storage devices usb-storage: device found at 3 usb-storage: waiting for device to settle before scanning usb 4-1: reset high speed USB device using ehci_hcd and address 3 scsi 1:0:0:0: Direct-Access ST325082 3A PQ: 0 ANSI: 0 sd 1:0:0:0: [sdb] 488397168 512-byte hardware sectors (250059 MB) sd 1:0:0:0: [sdb] Write Protect is off sd 1:0:0:0: [sdb] Mode Sense: 33 00 00 00 sd 1:0:0:0: [sdb] Assuming drive cache: write through sd 1:0:0:0: [sdb] 488397168 512-byte hardware sectors (250059 MB) sd 1:0:0:0: [sdb] Write Protect is off sd 1:0:0:0: [sdb] Mode Sense: 33 00 00 00 sd 1:0:0:0: [sdb] Assuming drive cache: write through sdb: sdb1 sd 1:0:0:0: [sdb] Attached SCSI disk sd 1:0:0:0: Attached scsi generic sg0 type 0 usb-storage: device scan complete Mounting /dev/sdb1 works as expected: # mount /dev/sdb1 /mnt # cat /proc/mounts | grep mnt /dev/sdb1 /mnt ext3 rw,data=ordered 0 0 But, if I try to mount /dev/dm-6 now, it doesn't work: # mount /dev/dm-6 /mnt mount: you must specify the filesystem type And I get a lot of error messages on dmesg: scsi 0:0:0:0: rejecting I/O to dead device Buffer I/O error on device dm-6, logical block 244195904 Buffer I/O error on device dm-6, logical block 244195905 Buffer I/O error on device dm-6, logical block 244195906 Buffer I/O error on device dm-6, logical block 244195907 scsi 0:0:0:0: rejecting I/O to dead device Buffer I/O error on device dm-6, logical block 244195904 scsi 0:0:0:0: rejecting I/O to dead device Buffer I/O error on device dm-6, logical block 244195905 scsi 0:0:0:0: rejecting I/O to dead device Buffer I/O error on device dm-6, logical block 244195906 scsi 0:0:0:0: rejecting I/O to dead device Buffer I/O error on device dm-6, logical block 244195907 scsi 0:0:0:0: rejecting I/O to dead device Buffer I/O error on device dm-6, logical block 244195904 scsi 0:0:0:0: rejecting I/O to dead device Buffer I/O error on device dm-6, logical block 244195905 scsi 0:0:0:0: rejecting I/O to dead device scsi 0:0:0:0: rejecting I/O to dead device scsi 0:0:0:0: rejecting I/O to dead device scsi 0:0:0:0: rejecting I/O to dead device scsi 0:0:0:0: rejecting I/O to dead device I'm following Factory (Beta-3 on PPC: 2.6.22.5-4-default #1 2007/08/27 09:51:45 UTC ppc ppc ppc GNU/Linux), and I don't remember seeing this problem, let's say, 20 days ago. I'd appreciate any help to debug this, I'll start by trying with older kernels. Below, the full dmesg for reference. Thanks! Leonardo Using PowerMac machine description Total memory = 1024MB; using 2048kB for hash table (at cfe00000) Linux version 2.6.22.5-4-default (geeko@buildhost) (gcc version 4.2.1 (SUSE Linux)) #1 2007/08/27 09:51:45 UTC Found initrd at 0xc4100000:0xc4390c00 Found UniNorth memory controller & host bridge @ 0xf8000000 revision: 0xd2 Mapped at 0xfdfc0000 Found a Intrepid mac-io controller, rev: 0, mapped at 0xfdf40000 Processor NAP mode on idle enabled. PowerMac motherboard: Mac mini Entering add_active_range(0, 0, 262144) 0 entries of 256 used Found UniNorth PCI host bridge at 0x00000000f0000000. Firmware bus number: 0->0 Found UniNorth PCI host bridge at 0x00000000f2000000. Firmware bus number: 0->0 Found UniNorth PCI host bridge at 0x00000000f4000000. Firmware bus number: 0->0 via-pmu: Server Mode is disabled PMU driver v2 initialized for Core99, firmware: 55 nvram: Checking bank 0... nvram: gen0=228, gen1=229 nvram: Active bank is: 1 nvram: OF partition at 0x410 nvram: XP partition at 0x1020 nvram: NR partition at 0x1120 Top of RAM: 0x40000000, Total RAM: 0x40000000 Memory hole size: 0MB Zone PFN ranges: DMA 0 -> 196608 Normal 196608 -> 196608 HighMem 196608 -> 262144 early_node_map[1] active PFN ranges 0: 0 -> 262144 On node 0 totalpages: 262144 DMA zone: 1536 pages used for memmap DMA zone: 0 pages reserved DMA zone: 195072 pages, LIFO batch:31 Normal zone: 0 pages used for memmap HighMem zone: 512 pages used for memmap HighMem zone: 65024 pages, LIFO batch:15 Built 1 zonelists. Total pages: 260096 Kernel command line: root=/dev/vg/root quiet sysrq=1 mpic: Setting up MPIC " MPIC 1 " version 1.2 at 80040000, max 4 CPUs mpic: ISU size: 64, shift: 6, mask: 3f mpic: Initializing for 64 sources PID hash table entries: 4096 (order: 12, 16384 bytes) GMT Delta read from XPRAM: 0 minutes, DST: off time_init: decrementer frequency = 41.620997 MHz time_init: processor frequency = 1416.666661 MHz Console: colour dummy device 80x25 console handover: boot [udbg0] -> real [tty0] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes) Inode-cache hash table entries: 65536 (order: 6, 262144 bytes) High memory: 262144k Memory: 1028688k/1048576k available (4392k kernel code, 281256k reserved, 164k data, 467k bss, 208k init) Calibrating delay loop... 83.20 BogoMIPS (lpj=166400) Security Framework v1.0.0 initialized Mount-cache hash table entries: 512 device-tree: Duplicate name in /cpus/PowerPC,G4@0, renamed to "l2-cache#1" NET: Registered protocol family 16 KeyWest i2c @0xf8001003 irq 42 /uni-n@f8000000/i2c@f8001000 channel 0 bus <multibus> channel 1 bus <multibus> KeyWest i2c @0x80018000 irq 26 /pci@f2000000/mac-io@17/i2c@18000 channel 0 bus <multibus> PMU i2c /pci@f2000000/mac-io@17/via-pmu@16000/pmu-i2c channel 1 bus <multibus> channel 2 bus <multibus> PCI: Probing PCI hardware PCI: Cannot allocate resource region 0 of device 0001:10:18.0 PCI: Cannot allocate resource region 0 of device 0001:10:19.0 Apple USB OHCI 0001:10:18.0 disabled by firmware Apple USB OHCI 0001:10:19.0 disabled by firmware usbcore: registered new interface driver usbfs usbcore: registered new interface driver hub usbcore: registered new device driver usb NET: Registered protocol family 2 IP route cache hash table entries: 32768 (order: 5, 131072 bytes) TCP established hash table entries: 131072 (order: 8, 1048576 bytes) TCP bind hash table entries: 65536 (order: 6, 262144 bytes) TCP: Hash tables configured (established 131072 bind 65536) TCP reno registered Unpacking initramfs... done Freeing initrd memory: 2627k freed Thermal assist unit not available audit: initializing netlink socket (disabled) audit(1188436210.328:1): initialized highmem bounce pool size: 64 pages VFS: Disk quotas dquot_6.5.1 Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) io scheduler noop registered io scheduler anticipatory registered io scheduler deadline registered io scheduler cfq registered (default) PCI: Enabling device 0000:00:10.0 (0006 -> 0007) radeonfb (0000:00:10.0): Invalid ROM signature 0 should be 0xaa55 radeonfb: Retrieved PLL infos from Open Firmware radeonfb: Reference=27.00 MHz (RefDiv=12) Memory=190.00 Mhz, System=250.00 MHz radeonfb: PLL min 12000 max 35000 i2c-adapter i2c-2: unable to read EDID block. i2c-adapter i2c-2: unable to read EDID block. i2c-adapter i2c-2: unable to read EDID block. radeonfb: Monitor 1 type CRT found radeonfb: EDID probed radeonfb: Monitor 2 type CRT found radeonfb: EDID probed Console: switching to colour frame buffer device 160x64 radeonfb (0000:00:10.0): ATI Radeon Yb Generic RTC Driver v1.07 Macintosh non-volatile memory driver v1.1 pmac_zilog: 0.6 (Benjamin Herrenschmidt ) ttyS0 at MMIO 0x80013020 (irq = 22) is a Z85c30 ESCC - Serial port ttyS1 at MMIO 0x80013000 (irq = 23) is a Z85c30 ESCC - Serial port Serial: MPC52xx PSC UART driver MacIO PCI driver attached to Intrepid chipset input: Macintosh mouse button emulation as /class/input/input0 apm_emu: PMU APM Emulation initialized. adb: starting probe task... adb: finished probe task... Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2 ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx PCI: Enabling device 0002:20:0d.0 (0000 -> 0002) ide0: Found Apple UniNorth ATA-6 controller, bus ID 3, irq 39 Probing IDE interface ide0... hda: ST9808210A, ATA DISK drive hdb: MATSHITACD-RW CW-8124, ATAPI CD/DVD-ROM drive hda: Enabling Ultra DMA 5 hdb: Enabling Ultra DMA 2 ide0 at 0xf1022000-0xf1022007,0xf1022160 on irq 39 ide1: Found Apple KeyLargo ATA-3 controller, bus ID 0, irq 24 Probing IDE interface ide1... Probing IDE interface ide1... hda: max request size: 512KiB hda: 156301488 sectors (80026 MB) w/8192KiB Cache, CHS=16383/255/63, UDMA(100) hda: cache flushes supported hda: [mac] hda1 hda2 hda3 hda4 hda5 ohci_hcd: 2006 August 04 USB 1.1 'Open' Host Controller (OHCI) Driver Apple USB OHCI 0001:10:18.0 disabled by firmware Apple USB OHCI 0001:10:19.0 disabled by firmware PCI: Enabling device 0001:10:1a.0 (0000 -> 0002) ohci_hcd 0001:10:1a.0: OHCI Host Controller ohci_hcd 0001:10:1a.0: new USB bus registered, assigned bus number 1 ohci_hcd 0001:10:1a.0: irq 29, io mem 0x80083000 usb usb1: new device found, idVendor=0000, idProduct=0000 usb usb1: new device strings: Mfr=3, Product=2, SerialNumber=1 usb usb1: Product: OHCI Host Controller usb usb1: Manufacturer: Linux 2.6.22.5-4-default ohci_hcd usb usb1: SerialNumber: 0001:10:1a.0 usb usb1: configuration #1 chosen from 1 choice hub 1-0:1.0: USB hub found hub 1-0:1.0: 2 ports detected PCI: Enabling device 0001:10:1b.0 (0000 -> 0002) ohci_hcd 0001:10:1b.0: OHCI Host Controller ohci_hcd 0001:10:1b.0: new USB bus registered, assigned bus number 2 ohci_hcd 0001:10:1b.0: irq 63, io mem 0x80082000 usb usb2: new device found, idVendor=0000, idProduct=0000 usb usb2: new device strings: Mfr=3, Product=2, SerialNumber=1 usb usb2: Product: OHCI Host Controller usb usb2: Manufacturer: Linux 2.6.22.5-4-default ohci_hcd usb usb2: SerialNumber: 0001:10:1b.0 usb usb2: configuration #1 chosen from 1 choice hub 2-0:1.0: USB hub found hub 2-0:1.0: 3 ports detected PCI: Enabling device 0001:10:1b.1 (0000 -> 0002) ohci_hcd 0001:10:1b.1: OHCI Host Controller ohci_hcd 0001:10:1b.1: new USB bus registered, assigned bus number 3 ohci_hcd 0001:10:1b.1: irq 63, io mem 0x80081000 usb usb3: new device found, idVendor=0000, idProduct=0000 usb usb3: new device strings: Mfr=3, Product=2, SerialNumber=1 usb usb3: Product: OHCI Host Controller usb usb3: Manufacturer: Linux 2.6.22.5-4-default ohci_hcd usb usb3: SerialNumber: 0001:10:1b.1 usb usb3: configuration #1 chosen from 1 choice hub 3-0:1.0: USB hub found hub 3-0:1.0: 2 ports detected usb 1-1: new full speed USB device using ohci_hcd and address 2 mice: PS/2 mouse device common for all mice PowerMac i2c bus pmu 2 registered PowerMac i2c bus pmu 1 registered PowerMac i2c bus mac-io 0 registered PowerMac i2c bus uni-n 1 registered PowerMac i2c bus uni-n 0 registered usb 1-1: new device found, idVendor=05ac, idProduct=1000 usb 1-1: new device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: configuration #1 chosen from 1 choice usbcore: registered new interface driver hiddev input: HID 05ac:1000 as /class/input/input1 input: USB HID v1.11 Keyboard [HID 05ac:1000] on usb-0001:10:1a.0-1 input: HID 05ac:1000 as /class/input/input2 input: USB HID v1.11 Mouse [HID 05ac:1000] on usb-0001:10:1a.0-1 usbcore: registered new interface driver usbhid drivers/hid/usbhid/hid-core.c: v2.6:USB HID core driver NET: Registered protocol family 1 NET: Registered protocol family 17 input: PMU as /class/input/input3 Freeing unused kernel memory: 208k init device-mapper: ioctl: 4.11.0-ioctl (2006-10-12) initialised: dm-devel@redhat.com PCI: Enabling device 0001:10:1b.2 (0004 -> 0006) ehci_hcd 0001:10:1b.2: EHCI Host Controller ehci_hcd 0001:10:1b.2: new USB bus registered, assigned bus number 4 ehci_hcd 0001:10:1b.2: irq 63, io mem 0x80080000 ehci_hcd 0001:10:1b.2: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004 usb usb4: new device found, idVendor=0000, idProduct=0000 usb usb4: new device strings: Mfr=3, Product=2, SerialNumber=1 usb usb4: Product: EHCI Host Controller usb usb4: Manufacturer: Linux 2.6.22.5-4-default ehci_hcd usb usb4: SerialNumber: 0001:10:1b.2 usb usb4: configuration #1 chosen from 1 choice hub 4-0:1.0: USB hub found hub 4-0:1.0: 5 ports detected md: linear personality registered for level -1 kjournald starting. Commit interval 5 seconds EXT3 FS on dm-2, internal journal EXT3-fs: mounted filesystem with ordered data mode. JBD: barrier-based sync failed on dm-2 - disabling barriers ieee80211_crypt: registered algorithm 'NULL' sungem.c:v0.98 8/24/03 David S. Miller (davem@redhat.com) hdb: ATAPI 24X DVD-ROM CD-R/RW drive, 2048kB Cache, UDMA(33) Uniform CD-ROM driver Revision: 3.20 PHY ID: 4061e4, addr: 0 eth0: Sun GEM (PCI) 10/100/1000BaseT Ethernet 00:14:51:00:d8:38 eth0: Found BCM5221 PHY ieee80211: 802.11 data/management/control stack, git-1.1.13 ieee80211: Copyright (C) 2004-2005 Intel Corporation Linux agpgart interface v0.102 (c) Dave Jones agpgart: Detected Apple UniNorth 2 chipset agpgart: configuring for size idx: 8 agpgart: AGP aperture is 32M @ 0x0 PCI: Enabling device 0002:20:0e.0 (0000 -> 0002) ohci1394: fw-host0: OHCI-1394 1.1 (PCI): IRQ=[40] MMIO=[f5000000-f50007ff] Max Packet=[2048] IR/IT contexts=[8/8] bcm43xx driver PCI: Enabling device 0001:10:12.0 (0004 -> 0006) bcm43xx: Chip ID 0x4306, rev 0x3 bcm43xx: Number of cores: 5 bcm43xx: Core 0: ID 0x800, rev 0x4, vendor 0x4243 bcm43xx: Core 1: ID 0x812, rev 0x5, vendor 0x4243 bcm43xx: Core 2: ID 0x80d, rev 0x2, vendor 0x4243 bcm43xx: Core 3: ID 0x807, rev 0x2, vendor 0x4243 bcm43xx: Core 4: ID 0x804, rev 0x9, vendor 0x4243 bcm43xx: PHY connected bcm43xx: Detected PHY: Analog: 2, Type 2, Revision 2 bcm43xx: Detected Radio: ID: 2205017f (Manuf: 17f Ver: 2050 Rev: 2) bcm43xx: Radio turned off bcm43xx: Radio turned off eth0 renamed to eth0_rename eth1 renamed to eth0 udev: renamed network interface eth1 to eth0 eth0_rename renamed to eth1 udev: renamed network interface eth0_rename to eth1 snd-aoa-fabric-layout: found bus with layout 58 snd-aoa-fabric-layout: Using direct GPIOs snd-aoa-fabric-layout: can use this codec Adding 2104504k swap on /dev/hda4. Priority:-1 extents:1 across:2104504k JBD: barrier-based sync failed on dm-2 - disabling barriers ieee1394: Host added: ID:BUS[0-00:1023] GUID[001451fffe00d838] JBD: barrier-based sync failed on dm-2 - disabling barriers eth1: Link is up at 100 Mbps, full-duplex. loop: module loaded kjournald starting. Commit interval 5 seconds EXT3 FS on hda3, internal journal EXT3-fs: mounted filesystem with ordered data mode. kjournald starting. Commit interval 5 seconds EXT3 FS on dm-0, internal journal EXT3-fs: mounted filesystem with ordered data mode. kjournald starting. Commit interval 5 seconds EXT3 FS on dm-1, internal journal EXT3-fs: mounted filesystem with ordered data mode. kjournald starting. Commit interval 5 seconds EXT3 FS on dm-3, internal journal EXT3-fs: mounted filesystem with ordered data mode. kjournald starting. Commit interval 5 seconds EXT3 FS on dm-4, internal journal EXT3-fs: mounted filesystem with ordered data mode. fuse init (API version 7.8) AppArmor: AppArmor initialized audit(1188436228.874:2): info="AppArmor initialized" pid=1602 JBD: barrier-based sync failed on dm-4 - disabling barriers JBD: barrier-based sync failed on dm-3 - disabling barriers eth1: Link is up at 100 Mbps, full-duplex. eth1: Pause is disabled NET: Registered protocol family 10 lo: Disabled Privacy Extensions Mobile IPv6 ip6_tables: (C) 2000-2006 Netfilter Core Team ip_tables: (C) 2000-2006 Netfilter Core Team audit(1188436241.978:3): audit_pid=2536 old=0 by auid=4294967295 eth1: no IPv6 routers present JBD: barrier-based sync failed on dm-0 - disabling barriers JBD: barrier-based sync failed on dm-1 - disabling barriers -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe@opensuse.org For additional commands, e-mail: opensuse-kernel+help@opensuse.org