Discuss November 2006

discuss@lists.centos.org

253 participants
263 discussions

Any long-time CentOS users on list using Ubuntu as well?
by chrism＠imntv.com 28 Nov '06

28 Nov '06

I've gotten roped into helping a local charity with some computing/infrastructure snafus. It seems their last good Samaritan installed Ubuntu all over the place and is "unavailable" now to clean up the mess. CentOS has made me somewhat lazy because everything just works out of the box for the most part and you've got the occasional "yum update". :) These are all desktop systems, if that makes any difference. With any luck, I'll be able to pave over the installs with CentOS 4.4 and call it a day. :D Any suggestions on known piles of doodie to step over would be very much appreciated. <g> Best regards,

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CentOS-announce Digest, Vol 21, Issue 12
by centos-announce-request＠centos.org 28 Nov '06

28 Nov '06

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2006:0745-3: Low CentOS 2 i386 tzdata enhancement update (John Newbigin) ---------------------------------------------------------------------- Message: 1 Date: Tue, 28 Nov 2006 15:29:51 +1100 From: John Newbigin <jnewbigin(a)ict.swin.edu.au> Subject: [CentOS-announce] CESA-2006:0745-3: Low CentOS 2 i386 tzdata enhancement update To: centos-announce(a)centos.org Message-ID: <456BBB3F.4060503(a)ict.swin.edu.au> Content-Type: text/plain; charset=us-ascii; format=flowed The following errata for CentOS-2 have been built and uploaded to the centos mirror: RHEA-2006:0745-3 tzdata enhancement update Files available: tzdata-2006m-3.el2_1.noarch.rpm More details are available from the RedHat web site at https://rhn.redhat.com/errata/rh21as-errata.html The easy way to make sure you are up to date with all the latest patches is to run: # yum update -- John Newbigin Computer Systems Officer Faculty of Information and Communication Technologies Swinburne University of Technology Melbourne, Australia http://www.ict.swin.edu.au/staff/jnewbigin ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 21, Issue 12 ***********************************************

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Confirming Multi-Processor
by Jack Murgia 28 Nov '06

28 Nov '06

I have a test bed server that's pretty old- PIII Dual 550. I've done yum update kernel-smp and when I run cat/proc/cpuinfo it lists both processors- is there anything I need to to to confirm that it's fully utilizing both processors? I ask this because under the old OS (Fedora Core 2) I always saw an error message at boot that said something about operating in single-processor mode because the firmware was pre-2001. I don't see this error in CentOS. The last firmware available for this logic board (N440BX) is dated 1999.

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smartd
by Denis Machard 28 Nov '06

28 Nov '06

I'm running a CentOS 4 and smartd fails to start on boot the centos 4 smartd service doesn't support scsi ? <mailto:denis.machard@enst-bretagne.fr> Denis

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postfix - hostname
by Guillermo Garron 28 Nov '06

28 Nov '06

Hi, I have this problem my email server's DNS name is ns1.mydomain.com, and it is registered in the reverse DNS also with that name, when i installed my server at the hostname i entered centos-server.mydomain.com when i tried to send an email from the root console with # mail root the email is returned saying that root(a)centos-server.mydomain.com, could not be verified i used the command # hostname ns1.mydomain.com and also edited the file. /etc/hosts, but i have the same result, the hostname did not change, i even restart my server with no luck. what am I missing? regards, Guillermo. PS my server is a CentOS 4.4, with postfix -- Guillermo Garron "Linux IS user friendly... It's just selective about who its friends are." (Using FC5, CentOS4.4 and Ubuntu 6.06)

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Gearing up for FOSDEM 2007
by Daniel de Kok 28 Nov '06

28 Nov '06

Hi all, [Resent here, because it is off-topic on centos-devel] According to [1] the project has arranged a stand at FOSDEM. Are things 'definite' enough to start booking a hotel/hostel? Since I am probably coming by train I can only take my laptop with me, and good cheer :). -- Daniel [1] http://wiki.fosdem.org/Stands

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RAID 1 not boot when disconnect a disk
by Roberto Pereyra 28 Nov '06

28 Nov '06

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(a)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(a)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 -- Ing. Roberto Pereyra ContenidosOnline Looking for Linux Virtual Private Servers ? Click here: http://www.spry.com/hosting-affiliate/scripts/t.php?a_aid=426&a_bid=56

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Get error msg if try to use kernel makefile / build kernel
by MikeW 28 Nov '06

28 Nov '06

Using the new method for building a standalone kernel module (although seems to happen with the traditional way as well) I get "mach_mpspec.h: No such file or directory" Same result if I try to do a kernel 'make'. Subsequently I get MAX_MP_BUSSES and MAX_IRQ_SOURCES undeclared. This should surely work 'out of the box' with Centos ? Any ideas about what's missing ? Thanks, MikeW

3 5

Centos-4.3: Filelocking problems under high [network related] load with kernel 2.6.9-42.0.3.ELsmp
by Martin Knoblauch 28 Nov '06

28 Nov '06

Hi, first of all, please CC me on any reply, as I am only subscribed to the digest. OK. Here is the problem. Said kernel (from 4.4) seems to have problems with file-locking when the system is under high, likely network related, load. The symptoms are things using file locking (rpm, the user-space automounter amd) fail to obtain locks, usually stating timeout problems. The sytem in question is a HP/DL380G4 with dual-single-core EM64T CPUs and 8GB of Memory. The network interfaces are "tg3". It happens with both CentOs and RHEL4. The high load can be triggered by copying three 3 GB files in parallel from an NFS server (Solaris10, NFS, TCP, 1GBit) to another NFS server (RHEL4, NFS, TCP, 100 MBit). The measured network performance is OK. During this operation the systems goes to Loads around/above 10. Overall responsiveness feels good, but software doing file-locking or stuff like opening a new ssh connection take extremely long. So, if anyone has an idea or hint, it will be highly appreciated. Cheers Martin ------------------------------------------------------ Martin Knoblauch email: k n o b i AT knobisoft DOT de www: http://www.knobisoft.de

2 3

Turn an ext2 filesystem into a component of a mirrored RAID?
by Bart Schaefer 28 Nov '06

28 Nov '06

We have a CentOS 3 server with about 300GB of data on an ext2 filesystem that we need to mirror onto a new drive, which we're then going to pull out and put into a second server. A straight disk-to-disk copy (with rsync, tar, or "cp -a" doesn't much matter) manages about 75MB per minute, which would take almost three days, and the system gets very sluggish while such a copy is going on, so we can't afford to just let it run. Is it possible, without loss of data, to convert the existing ext2 filesystem into a mirrored software RAID, then add the new drive as a second device and let rebuilding the RAID take care of making the copy? Even if this took more time, we've had good overall system performance with software RAIDs rebuilding in the background before, so it could run as long as necessary. We'd then need to be able to remove the second device from the RAID and either convert it back into a plain ext2 or put it into a similar software RAID in the destination machine. Is this possible? Is there another plan that would make more sense? Thanks in advance for suggestions.

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Discuss November 2006