Date: Fri, 20 Jan 2006 10:55:35 -0800 From: Joe S <js.lists@gmail.com> To: Joe S <js.lists@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: Can't mount existing data disk after upgrade (disklabel gone) Message-ID: <43D13227.5020709@gmail.com> In-Reply-To: <43D11B4F.90806@gmail.com> References: <43D11B4F.90806@gmail.com>
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Joe S wrote: > First of all, I have learned something VERY important about FreeBSD. > SAVE your DISKLABELS! > > I have 2 drives in my home file server. One 80GB drive (ad0) for the OS > and one 300 GB drive for my data. A few days ago, I performed a clean > install of FreeBSD 6.0 on the 1st drive (ad0). After the install I tried > to mount ad4, but could not. I read somewhere that I was supposed to > save my disklabels. DOH! I did not do this, nor have I ever read about > this in the FreeBSD handbook. > > After reading through the handbook and googling, I found a tool called > scan_ffs that can help me recreate my disklabels by scanning my drive > for partitions. Great! > > Here is the output of scan_ffs on ad4: > root@coruscant# scan_ffs -l /dev/ad4 > X: 584002180 2097215 4.2BSD 2048 16384 0 # /data > > Good. That is my /data partition. Its UFS2, created in FBSD 5.4. > Next, I tried editing the disklabel. It starts out like this: > # /dev/ad4s1: > 8 partitions: > # size offset fstype [fsize bsize bps/cpg] > > a: 586099316 16 unused 0 0 > c: 586099332 0 unused 0 0 > > I changed it to this: > # /dev/ad4s1: > 8 partitions: > # size offset fstype [fsize bsize bps/cpg] > a: 584002180 2097215 4.2BSD 2048 16384 0 # /data > c: 586099332 0 unused 0 0 > > But, I get this error: > partition a: partition extends past end of unit > re-edit the label? [y]: > > Here is the output of bsdlabel. Notice the different sizes: > root@coruscant# bsdlabel -r ad4 > # /dev/ad4: > 8 partitions: > # size offset fstype [fsize bsize bps/cpg] > a: 586114688 16 unused 0 0 > c: 586114704 0 unused 0 0 > root@coruscant# bsdlabel -r ad4s1 > # /dev/ad4s1: > 8 partitions: > # size offset fstype [fsize bsize bps/cpg] > a: 586099316 16 unused 0 0 > c: 586099332 0 unused 0 0 > root@coruscant# > root@coruscant# bsdlabel -r ad4s1a > # /dev/ad4s1a: > 8 partitions: > # size offset fstype [fsize bsize bps/cpg] > a: 586099300 16 unused 0 0 > c: 586099316 0 unused 0 0 > > When I try to mount /dev/ad4s1a to /data, I get this error: > coruscant# mount /dev/ad4s1a /mnt > mount: /dev/ad4s1a on /mnt: incorrect super block > > How can I properly re-create the disklabel? It seems this is what I need > to do in order to get to my data. Any help would be greatly appreciated. > > -joe > > > PS> Here is my dmesg: > > Copyright (c) 1992-2005 The FreeBSD Project. > Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 > The Regents of the University of California. All rights reserved. > FreeBSD 6.0-SECURITY #0: Mon Dec 19 23:46:33 UTC 2005 > root@builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC > ACPI APIC Table: <INTEL D865PERL> > Timecounter "i8254" frequency 1193182 Hz quality 0 > CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (2394.01-MHz 686-class CPU) > Origin = "GenuineIntel" Id = 0xf29 Stepping = 9 > > Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> > > Features2=0x4400<CNTX-ID,<b14>> > real memory = 1072889856 (1023 MB) > avail memory = 1040945152 (992 MB) > ioapic0 <Version 2.0> irqs 0-23 on motherboard > npx0: [FAST] > npx0: <math processor> on motherboard > npx0: INT 16 interface > acpi0: <INTEL D865PERL> on motherboard > acpi0: Power Button (fixed) > pci_link0: <ACPI PCI Link LNKA> irq 11 on acpi0 > pci_link1: <ACPI PCI Link LNKB> irq 3 on acpi0 > pci_link2: <ACPI PCI Link LNKC> irq 10 on acpi0 > pci_link3: <ACPI PCI Link LNKD> irq 5 on acpi0 > pci_link4: <ACPI PCI Link LNKE> irq 0 on acpi0 > pci_link5: <ACPI PCI Link LNKF> irq 0 on acpi0 > pci_link6: <ACPI PCI Link LNKG> irq 9 on acpi0 > pci_link7: <ACPI PCI Link LNKH> irq 9 on acpi0 > Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000 > acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0 > cpu0: <ACPI CPU> on acpi0 > acpi_throttle0: <ACPI CPU Throttling> on cpu0 > pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0 > pci0: <ACPI PCI bus> on pcib0 > agp0: <Intel 82865 host to AGP bridge> mem 0xf8000000-0xfbffffff at > device 0.0 on pci0 > pcib1: <ACPI PCI-PCI bridge> at device 1.0 on pci0 > pci1: <ACPI PCI bus> on pcib1 > pci1: <display, VGA> at device 0.0 (no driver attached) > uhci0: <Intel 82801EB (ICH5) USB controller USB-A> port 0xcc00-0xcc1f > irq 16 at device 29.0 on pci0 > uhci0: [GIANT-LOCKED] > usb0: <Intel 82801EB (ICH5) USB controller USB-A> on uhci0 > usb0: USB revision 1.0 > uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1 > uhub0: 2 ports with 2 removable, self powered > uhci1: <Intel 82801EB (ICH5) USB controller USB-B> port 0xd000-0xd01f > irq 19 at device 29.1 on pci0 > uhci1: [GIANT-LOCKED] > usb1: <Intel 82801EB (ICH5) USB controller USB-B> on uhci1 > usb1: USB revision 1.0 > uhub1: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1 > uhub1: 2 ports with 2 removable, self powered > uhci2: <Intel 82801EB (ICH5) USB controller USB-C> port 0xd400-0xd41f > irq 18 at device 29.2 on pci0 > uhci2: [GIANT-LOCKED] > usb2: <Intel 82801EB (ICH5) USB controller USB-C> on uhci2 > usb2: USB revision 1.0 > uhub2: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1 > uhub2: 2 ports with 2 removable, self powered > uhci3: <Intel 82801EB (ICH5) USB controller USB-D> port 0xd800-0xd81f > irq 16 at device 29.3 on pci0 > uhci3: [GIANT-LOCKED] > usb3: <Intel 82801EB (ICH5) USB controller USB-D> on uhci3 > usb3: USB revision 1.0 > uhub3: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1 > uhub3: 2 ports with 2 removable, self powered > ehci0: <EHCI (generic) USB 2.0 controller> mem 0xfebffc00-0xfebfffff irq > 23 at device 29.7 on pci0 > ehci0: [GIANT-LOCKED] > usb4: EHCI version 1.0 > usb4: companion controllers, 2 ports each: usb0 usb1 usb2 usb3 > usb4: <EHCI (generic) USB 2.0 controller> on ehci0 > usb4: USB revision 2.0 > uhub4: Intel EHCI root hub, class 9/0, rev 2.00/1.00, addr 1 > uhub4: 8 ports with 8 removable, self powered > pcib2: <ACPI PCI-PCI bridge> at device 30.0 on pci0 > pci2: <ACPI PCI bus> on pcib2 > atapci0: <Promise PDC20270 UDMA100 controller> port > 0xbc00-0xbc07,0xb800-0xb803,0xb400-0xb407,0xb000-0xb003,0xac00-0xac0f > mem 0xfeaf0000-0xfeafffff irq 22 at device 1.0 on pci2 > ata2: <ATA channel 0> on atapci0 > ata3: <ATA channel 1> on atapci0 > ahc0: <Adaptec 2940 Ultra2 SCSI adapter> port 0xa800-0xa8ff mem > 0xfeadf000-0xfeadffff irq 17 at device 2.0 on pci2 > ahc0: [GIANT-LOCKED] > aic7890/91: Ultra2 Wide Channel A, SCSI Id=7, 32/253 SCBs > fxp0: <Intel 82559 Pro/100 Ethernet> port 0xa400-0xa43f mem > 0xfeade000-0xfeadefff,0xfe900000-0xfe9fffff irq 18 at device 4.0 on pci2 > miibus0: <MII bus> on fxp0 > inphy0: <i82555 10/100 media interface> on miibus0 > inphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto > fxp0: Ethernet address: 00:d0:b7:9f:dd:0f > isab0: <PCI-ISA bridge> at device 31.0 on pci0 > isa0: <ISA bus> on isab0 > atapci1: <Intel ICH5 UDMA100 controller> port > 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xffa0-0xffaf at device 31.1 on pci0 > ata0: <ATA channel 0> on atapci1 > ata1: <ATA channel 1> on atapci1 > atapci2: <Intel ICH5 SATA150 controller> port > 0xec00-0xec07,0xe800-0xe803,0xe400-0xe407,0xe000-0xe003,0xdc00-0xdc0f > irq 18 at device 31.2 on pci0 > atapci2: failed to enable memory mapping! > ata4: <ATA channel 0> on atapci2 > ata5: <ATA channel 1> on atapci2 > pci0: <serial bus, SMBus> at device 31.3 (no driver attached) > acpi_button0: <Sleep Button> on acpi0 > atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0 > atkbd0: <AT Keyboard> irq 1 on atkbdc0 > kbd0 at atkbd0 > atkbd0: [GIANT-LOCKED] > sio0: configured irq 4 not in bitmap of probed irqs 0 > sio0: port may not be enabled > sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on > acpi0 > sio0: type 16550A > ppc0: <Standard parallel printer port> port 0x378-0x37f irq 7 on acpi0 > ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode > ppbus0: <Parallel port bus> on ppc0 > plip0: <PLIP network interface> on ppbus0 > lpt0: <Printer> on ppbus0 > lpt0: Interrupt-driven port > ppi0: <Parallel I/O> on ppbus0 > pmtimer0 on isa0 > orm0: <ISA Option ROMs> at iomem > 0xc0000-0xcf7ff,0xcf800-0xd7fff,0xd8000-0xd87ff,0xd8800-0xd9fff,0xda000-0xdafff > on isa0 > sc0: <System console> at flags 0x100 on isa0 > sc0: VGA <16 virtual consoles, flags=0x300> > sio1: configured irq 3 not in bitmap of probed irqs 0 > sio1: port may not be enabled > vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0 > Timecounter "TSC" frequency 2394008600 Hz quality 800 > Timecounters tick every 1.000 msec > Waiting 5 seconds for SCSI devices to settle > ad0: 76319MB <WDC WD800JB-00CRA1 17.07W17> at ata0-master UDMA100 > acd0: CDROM <CDU5211/YYS7> at ata1-master UDMA33 > ad4: 286188MB <Maxtor 6B300R0 BAH41B70> at ata2-master UDMA100 > ad4: Promise subdisks has no flags > sa0 at ahc0 bus 0 target 0 lun 0 > sa0: <SONY SDX-300C 0300> Removable Sequential Access SCSI-2 device > sa0: 20.000MB/s transfers (10.000MHz, offset 15, 16bit) > Trying to mount root from ufs:/dev/ad0s1a > Wonderful. In trying to recreate the disklabel, i was unaware that sysinstall would also try to format it. It re-formatted my drive. I stopped it after 3 seconds when I realized what was happening. Can someone please add this to the handbook? Also, can someone recommend some good forensics tools?
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