Hi

I have a clean CentOS 4.4 disk and I have setup a RAID 1 with two IDE disk.

The system RAID 1 boot fine but when I disconnect a disk (the first disk) the system not boot. The screen goes black and not boot anything (grub not boot).

Can anybody help me ? What I doing wrong ?? Excuse my english ....

My setup is:

df S.ficheros Bloques de 1K Usado Dispon Uso% Montado en /dev/md1 75442944 1334492 70276152 2% / /dev/md0 497765 16029 456037 4% /boot none 241588 0 241588 0% /dev/shm

cat /proc/mdstat Personalities : [raid1] md1 : active raid1 hdc3[1] hda3[0] 76646016 blocks [2/2] [UU]

md0 : active raid1 hdc1[1] hda1[0] 513984 blocks [2/2] [UU]

cat /etc/fstab # This file is edited by fstab-sync - see 'man fstab-sync' for details /dev/md1 / ext3 defaults 1 1 /dev/md0 /boot ext3 defaults 1 2 none /dev/pts devpts gid=5,mode=620 0 0 none /dev/shm tmpfs defaults 0 0 none /proc proc defaults 0 0 none /sys sysfs defaults 0 0 /dev/hdc2 swap swap defaults 0 0 /dev/hda2 swap swap defaults 0 0 /dev/fd0 /media/floppy auto pamconsole,exec,noauto,managed 0 0

dmesg Linux version 2.6.9-42.0.3.EL (buildsvn@build-i386) (gcc version 3.4.6 20060404 (Red Hat 3.4.6-3)) #1 Fri Oct 6 05:59:54 CDT 2006 BIOS-provided physical RAM map: BIOS-e820: 0000000000000000 - 000000000009fc00 (usable) BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved) BIOS-e820: 00000000000e4000 - 0000000000100000 (reserved) BIOS-e820: 0000000000100000 - 000000001dfb0000 (usable) BIOS-e820: 000000001dfb0000 - 000000001dfc0000 (ACPI data) BIOS-e820: 000000001dfc0000 - 000000001dff0000 (ACPI NVS) BIOS-e820: 000000001dff0000 - 000000001e000000 (reserved) BIOS-e820: 00000000ff780000 - 0000000100000000 (reserved) 0MB HIGHMEM available. 479MB LOWMEM available. found SMP MP-table at 000ff780 Using x86 segment limits to approximate NX protection zapping low mappings. On node 0 totalpages: 122800 DMA zone: 4096 pages, LIFO batch:1 Normal zone: 118704 pages, LIFO batch:16 HighMem zone: 0 pages, LIFO batch:1 DMI 2.3 present. ACPI: RSDP (v000 ACPIAM ) @ 0x000fad80 ACPI: RSDT (v001 A M I OEMRSDT 0x03000616 MSFT 0x00000097) @ 0x1dfb0000 ACPI: FADT (v002 A M I OEMFACP 0x03000616 MSFT 0x00000097) @ 0x1dfb0200 ACPI: MADT (v001 A M I OEMAPIC 0x03000616 MSFT 0x00000097) @ 0x1dfb0390 ACPI: OEMB (v001 A M I AMI_OEM 0x03000616 MSFT 0x00000097) @ 0x1dfc0040 ACPI: DSDT (v001 100XX 100XX001 0x00000001 INTL 0x02002026) @ 0x00000000 ACPI: PM-Timer IO Port: 0x808 ACPI: Local APIC address 0xfee00000 ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled) Processor #0 15:4 APIC version 20 ACPI: LAPIC (acpi_id[0x02] lapic_id[0x81] disabled) Enabling APIC mode: Flat. Using 0 I/O APICs ACPI: IOAPIC (id[0x01] address[0xfec00000] gsi_base[0]) IOAPIC[0]: apic_id 1, version 17, address 0xfec00000, GSI 0-23 ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl) ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level) ACPI: IRQ0 used by override. ACPI: IRQ2 used by override. ACPI: IRQ9 used by override. Using ACPI (MADT) for SMP configuration information Allocating PCI resources starting at 20000000 (gap: 1e000000:e1780000) Built 1 zonelists Kernel command line: ro root=/dev/md1 mapped APIC to ffffd000 (fee00000) Initializing CPU#0 CPU 0 irqstacks, hard=c0400000 soft=c03ff000 PID hash table entries: 2048 (order: 11, 32768 bytes) Detected 2787.059 MHz processor. Using pmtmr for high-res timesource Console: colour VGA+ 80x25 Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) Memory: 482360k/491200k available (2150k kernel code, 8196k reserved, 716k data, 164k init, 0k highmem) Calibrating delay using timer specific routine.. 5575.19 BogoMIPS (lpj=2787599) Security Scaffold v1.0.0 initialized SELinux: Initializing. SELinux: Starting in permissive mode There is already a security framework initialized, register_security failed. selinux_register_security: Registering secondary module capability Capability LSM initialized as secondary Mount-cache hash table entries: 512 (order: 0, 4096 bytes) CPU: After generic identify, caps: bfebfbff 20000000 00000000 00000000 CPU: After vendor identify, caps: bfebfbff 20000000 00000000 00000000 monitor/mwait feature present. using mwait in idle threads. CPU: Trace cache: 12K uops, L1 D cache: 16K CPU: L2 cache: 1024K CPU: After all inits, caps: bfebf3ff 20000000 00000000 00000080 Intel machine check architecture supported. Intel machine check reporting enabled on CPU#0. CPU0: Intel P4/Xeon Extended MCE MSRs (24) available CPU0: Thermal monitoring enabled CPU: Intel(R) Pentium(R) 4 CPU 2.80GHz stepping 09 Enabling fast FPU save and restore... done. Enabling unmasked SIMD FPU exception support... done. Checking 'hlt' instruction... OK. BIOS bug: Legacy-free FADT detected, but FADT size (129) is incorrect! ENABLING IO-APIC IRQs ..TIMER: vector=0x31 pin1=2 pin2=-1 checking if image is initramfs... it is Freeing initrd memory: 396k freed NET: Registered protocol family 16 PCI: PCI BIOS revision 2.10 entry at 0xf0031, last bus=1 PCI: Using configuration type 1 mtrr: v2.0 (20020519) ACPI: Subsystem revision 20040816 ACPI: Interpreter enabled ACPI: Using IOAPIC for interrupt routing ACPI: PCI Root Bridge [PCI0] (00:00) PCI: Probing PCI hardware (bus 00) PCI: Ignoring BAR0-3 of IDE controller 0000:00:02.5 ACPI: PCI Interrupt Routing Table [_SB_.PCI0._PRT] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 7 10 *11 12 14 15) ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 7 10 11 12 14 15) *0, disabled. ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 7 *10 11 12 14 15) ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 *5 7 10 11 12 14 15) ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 *5 7 10 11 12 14 15) ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 *5 7 10 11 12 14 15) ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 7 *10 11 12 14 15) ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 *5 7 10 11 12 14 15) Linux Plug and Play Support v0.97 (c) Adam Belay usbcore: registered new driver usbfs usbcore: registered new driver hub PCI: Using ACPI for IRQ routing ACPI: PCI interrupt 0000:00:02.5[A] -> GSI 16 (level, low) -> IRQ 169 ACPI: PCI interrupt 0000:00:02.7[C] -> GSI 18 (level, low) -> IRQ 177 ACPI: PCI interrupt 0000:00:03.0[A] -> GSI 20 (level, low) -> IRQ 185 ACPI: PCI interrupt 0000:00:03.1[B] -> GSI 21 (level, low) -> IRQ 193 ACPI: PCI interrupt 0000:00:03.2[C] -> GSI 22 (level, low) -> IRQ 201 ACPI: PCI interrupt 0000:00:03.3[D] -> GSI 23 (level, low) -> IRQ 209 ACPI: PCI interrupt 0000:00:0b.0[A] -> GSI 19 (level, low) -> IRQ 217 ACPI: PCI interrupt 0000:01:00.0[A] -> GSI 16 (level, low) -> IRQ 169 apm: BIOS version 1.2 Flags 0x03 (Driver version 1.16ac) apm: overridden by ACPI. audit: initializing netlink socket (disabled) audit(1164373497.698:1): initialized Total HugeTLB memory allocated, 0 VFS: Disk quotas dquot_6.5.1 Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) SELinux: Registering netfilter hooks Initializing Cryptographic API ksign: Installing public key data Loading keyring - Added public key 43FDDC2AA0FF41CC - User ID: CentOS (Kernel Module GPG key) pci_hotplug: PCI Hot Plug PCI Core version: 0.5 ACPI: Processor [CPU1] (supports C1) Real Time Clock Driver v1.12 Linux agpgart interface v0.100 (c) Dave Jones agpgart: Detected SiS 661 chipset agpgart: Maximum main memory to use for agp memory: 409M agpgart: AGP aperture is 64M @ 0xe0000000 serio: i8042 AUX port at 0x60,0x64 irq 12 serio: i8042 KBD port at 0x60,0x64 irq 1 Serial: 8250/16550 driver $Revision: 1.90 $ 8 ports, IRQ sharing enabled ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A RAMDISK driver initialized: 16 RAM disks of 16384K size 1024 blocksize divert: not allocating divert_blk for non-ethernet device lo Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2 ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx SIS5513: IDE controller at PCI slot 0000:00:02.5 ACPI: PCI interrupt 0000:00:02.5[A] -> GSI 16 (level, low) -> IRQ 169 SIS5513: chipset revision 1 SIS5513: not 100% native mode: will probe irqs later SIS5513: SiS 962/963 MuTIOL IDE UDMA133 controller ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:DMA, hdb:DMA ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:DMA, hdd:DMA Probing IDE interface ide0... hda: SAMSUNG SP0822N, ATA DISK drive Using cfq io scheduler ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 Probing IDE interface ide1... hdc: SAMSUNG SP0802N, ATA DISK drive ide1 at 0x170-0x177,0x376 on irq 15 Probing IDE interface ide2... Probing IDE interface ide3... Probing IDE interface ide4... Probing IDE interface ide5... hda: max request size: 1024KiB hda: 156368016 sectors (80060 MB) w/2048KiB Cache, CHS=16383/255/63, UDMA(100) hda: cache flushes supported hda: hda1 hda2 hda3 hdc: max request size: 1024KiB hdc: 156368016 sectors (80060 MB) w/2048KiB Cache, CHS=16383/255/63, UDMA(33) hdc: cache flushes supported hdc: hdc1 hdc2 hdc3 ide-floppy driver 0.99.newide usbcore: registered new driver hiddev usbcore: registered new driver usbhid drivers/usb/input/hid-core.c: v2.0:USB HID core driver mice: PS/2 mouse device common for all mice input: AT Translated Set 2 keyboard on isa0060/serio0 input: ImPS/2 Generic Wheel Mouse on isa0060/serio1 md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27 NET: Registered protocol family 2 IP route cache hash table entries: 4096 (order: 2, 16384 bytes) TCP established hash table entries: 16384 (order: 5, 131072 bytes) TCP bind hash table entries: 16384 (order: 6, 458752 bytes) TCP: Hash tables configured (established 16384 bind 16384) Initializing IPsec netlink socket NET: Registered protocol family 1 NET: Registered protocol family 17 ACPI: (supports S0 S1 S3 S4 S5) ACPI wakeup devices: PS2K PS2M UAR1 UAR2 EUSB USB USB2 USB3 AC97 MC97 PCI1 PCI2 PCI3 RTLL Freeing unused kernel memory: 164k freed md: raid1 personality registered as nr 3 md: Autodetecting RAID arrays. md: autorun ... md: considering hdc3 ... md: adding hdc3 ... md: hdc1 has different UUID to hdc3 md: adding hda3 ... md: hda1 has different UUID to hdc3 md: created md1 md: bind<hda3> md: bind<hdc3> md: running: <hdc3><hda3> raid1: raid set md1 active with 2 out of 2 mirrors md: considering hdc1 ... md: adding hdc1 ... md: adding hda1 ... md: created md0 md: bind<hda1> md: bind<hdc1> md: running: <hdc1><hda1> raid1: raid set md0 active with 2 out of 2 mirrors md: ... autorun DONE. md: Autodetecting RAID arrays. md: autorun ... md: ... autorun DONE. kjournald starting. Commit interval 5 seconds EXT3-fs: mounted filesystem with ordered data mode. SELinux: Disabled at runtime. SELinux: Unregistering netfilter hooks inserting floppy driver for 2.6.9-42.0.3.EL Floppy drive(s): fd0 is 1.44M FDC 0 is a post-1991 82077 8139too Fast Ethernet driver 0.9.27 ACPI: PCI interrupt 0000:00:0b.0[A] -> GSI 19 (level, low) -> IRQ 217 divert: allocating divert_blk for eth0 eth0: RealTek RTL8139 at 0xe400, 00:17:31:27:38:60, IRQ 217 eth0: Identified 8139 chip type 'RTL-8100B/8139D' ACPI: PCI interrupt 0000:00:02.7[C] -> GSI 18 (level, low) -> IRQ 177 intel8x0_measure_ac97_clock: measured 50039 usecs intel8x0: clocking to 48000 ACPI: PCI interrupt 0000:00:03.3[D] -> GSI 23 (level, low) -> IRQ 209 ehci_hcd 0000:00:03.3: EHCI Host Controller ehci_hcd 0000:00:03.3: irq 209, pci mem de832000 ehci_hcd 0000:00:03.3: new USB bus registered, assigned bus number 1 PCI: cache line size of 128 is not supported by device 0000:00:03.3 ehci_hcd 0000:00:03.3: USB 2.0 enabled, EHCI 1.00, driver 2004-May-10 hub 1-0:1.0: USB hub found hub 1-0:1.0: 8 ports detected ohci_hcd: 2004 Feb 02 USB 1.1 'Open' Host Controller (OHCI) Driver (PCI) ACPI: PCI interrupt 0000:00:03.0[A] -> GSI 20 (level, low) -> IRQ 185 ohci_hcd 0000:00:03.0: OHCI Host Controller ohci_hcd 0000:00:03.0: irq 185, pci mem de840000 ohci_hcd 0000:00:03.0: new USB bus registered, assigned bus number 2 hub 2-0:1.0: USB hub found hub 2-0:1.0: 3 ports detected ACPI: PCI interrupt 0000:00:03.1[B] -> GSI 21 (level, low) -> IRQ 193 ohci_hcd 0000:00:03.1: OHCI Host Controller ohci_hcd 0000:00:03.1: irq 193, pci mem de842000 ohci_hcd 0000:00:03.1: new USB bus registered, assigned bus number 3 hub 3-0:1.0: USB hub found hub 3-0:1.0: 3 ports detected ACPI: PCI interrupt 0000:00:03.2[C] -> GSI 22 (level, low) -> IRQ 201 ohci_hcd 0000:00:03.2: OHCI Host Controller ohci_hcd 0000:00:03.2: irq 201, pci mem de8d4000 ohci_hcd 0000:00:03.2: new USB bus registered, assigned bus number 4 hub 4-0:1.0: USB hub found hub 4-0:1.0: 2 ports detected md: Autodetecting RAID arrays. md: autorun ... md: ... autorun DONE. ACPI: Power Button (FF) [PWRF] EXT3 FS on md1, internal journal device-mapper: 4.5.0-ioctl (2005-10-04) initialised: dm-devel@redhat.com kjournald starting. Commit interval 5 seconds EXT3 FS on md0, internal journal EXT3-fs: mounted filesystem with ordered data mode. Adding 1020116k swap on /dev/hdc2. Priority:-1 extents:1 Adding 1020116k swap on /dev/hda2. Priority:-2 extents:1 IA-32 Microcode Update Driver: v1.14 tigran@veritas.com microcode: CPU0 already at revision 0x3 (current=0x3) microcode: No new microdata for cpu 0 IA-32 Microcode Update Driver v1.14 unregistered parport0: PC-style at 0x378 (0x778) [PCSPP,TRISTATE,EPP] parport0: irq 7 detected ip_tables: (C) 2000-2002 Netfilter core team ip_tables: (C) 2000-2002 Netfilter core team eth0: link up, 100Mbps, full-duplex, lpa 0x45E1 parport0: PC-style at 0x378 (0x778) [PCSPP,TRISTATE,EPP] parport0: irq 7 detected lp0: using parport0 (polling). lp0: console ready NET: Registered protocol family 10 Disabled Privacy Extensions on device c0384d60(lo) IPv6 over IPv4 tunneling driver divert: not allocating divert_blk for non-ethernet device sit0 eth0: no IPv6 routers present