On Tue, Jun 13, 2006 at 12:14:21PM -0700, Joe wrote:
> I've having a problem understanding how to write data to a disk.
> I want to wipe an old hard drive before getting rid of it.
> I have attached the hard drive to my system via usb.
>
> Normally, this would work (in different OS's):
>
> # dd if=/dev/urandom of=/dev/sd0
Specify the slice (i.e. /dev/rsd0c to access the
entire disk)
>
> However, this command creates a file /dev/sd0 and fills it with random
> data. I want to write this data to the disk instead.
>
> The same thing happens when I use /dev/rsd0.
>
> Any help would be appreciated.
>
>
>
>
> OpenBSD 3.9 (GENERIC) #617: Thu Mar 2 02:26:48 MST 2006
> [EMAIL PROTECTED]:/usr/src/sys/arch/i386/compile/GENERIC
> cpu0: Intel(R) Pentium(R) 4 CPU 3.00GHz ("GenuineIntel" 686-class) 3 GHz
> cpu0:
> FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,CNXT-ID
> real mem = 2146140160 (2095840K)
> avail mem = 1952206848 (1906452K)
> using 4278 buffers containing 107409408 bytes (104892K) of memory
> mainbus0 (root)
> bios0 at mainbus0: AT/286+(00) BIOS, date 01/21/04, BIOS32 rev. 0 @ 0xf0010
> apm0 at bios0: Power Management spec V1.2
> apm0: AC on, battery charge unknown
> apm0: flags 30102 dobusy 0 doidle 1
> pcibios0 at bios0: rev 2.1 @ 0xf0000/0x10000
> pcibios0: PCI IRQ Routing Table rev 1.0 @ 0xf3d40/208 (11 entries)
> pcibios0: PCI Interrupt Router at 000:31:0 ("Intel 82801EB/ER LPC" rev 0x00)
> pcibios0: PCI bus #3 is the last bus
> bios0: ROM list: 0xc0000/0xf800
> cpu0 at mainbus0
> pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
> pchb0 at pci0 dev 0 function 0 "Intel 82875P Host" rev 0x02
> ppb0 at pci0 dev 1 function 0 "Intel 82875P AGP" rev 0x02
> pci1 at ppb0 bus 1
> vga1 at pci1 dev 0 function 0 "NVIDIA Quadro4 NVS" rev 0xc1
> wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
> wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
> ppb1 at pci0 dev 3 function 0 "Intel 82875P PCI-CSA" rev 0x02
> pci2 at ppb1 bus 2
> em0 at pci2 dev 1 function 0 "Intel PRO/1000CT (82547EI)" rev 0x00: irq
> 10, address 00:11:11:b3:77:c6
> uhci0 at pci0 dev 29 function 0 "Intel 82801EB/ER USB" rev 0x02: irq 11
> usb0 at uhci0: USB revision 1.0
> uhub0 at usb0
> uhub0: Intel UHCI root hub, rev 1.00/1.00, addr 1
> uhub0: 2 ports with 2 removable, self powered
> uhci1 at pci0 dev 29 function 1 "Intel 82801EB/ER USB" rev 0x02: irq 5
> usb1 at uhci1: USB revision 1.0
> uhub1 at usb1
> uhub1: Intel UHCI root hub, rev 1.00/1.00, addr 1
> uhub1: 2 ports with 2 removable, self powered
> uhci2 at pci0 dev 29 function 2 "Intel 82801EB/ER USB" rev 0x02: irq 10
> usb2 at uhci2: USB revision 1.0
> uhub2 at usb2
> uhub2: Intel UHCI root hub, rev 1.00/1.00, addr 1
> uhub2: 2 ports with 2 removable, self powered
> uhci3 at pci0 dev 29 function 3 "Intel 82801EB/ER USB" rev 0x02: irq 11
> usb3 at uhci3: USB revision 1.0
> uhub3 at usb3
> uhub3: Intel UHCI root hub, rev 1.00/1.00, addr 1
> uhub3: 2 ports with 2 removable, self powered
> ehci0 at pci0 dev 29 function 7 "Intel 82801EB/ER USB2" rev 0x02: irq 9
> usb4 at ehci0: USB revision 2.0
> uhub4 at usb4
> uhub4: Intel EHCI root hub, rev 2.00/1.00, addr 1
> uhub4: 8 ports with 8 removable, self powered
> ppb2 at pci0 dev 30 function 0 "Intel 82801BA AGP" rev 0xc2
> pci3 at ppb2 bus 3
> emu0 at pci3 dev 1 function 0 "Creative Labs SoundBlaster Live" rev
> 0x07: irq 11
> ac97: codec id 0x83847608 (SigmaTel STAC9708/11)
> ac97: codec features 18 bit DAC, 18 bit ADC, SigmaTel 3D
> audio0 at emu0
> "Creative Labs PCI Gameport Joystick" rev 0x07 at pci3 dev 1 function 1
> not configured
> ichpcib0 at pci0 dev 31 function 0 "Intel 82801EB/ER LPC" rev 0x02
> pciide0 at pci0 dev 31 function 1 "Intel 82801EB/ER IDE" rev 0x02: DMA,
> channel 0 configured to compatibility, channel 1 configured to compatibility
> wd0 at pciide0 channel 0 drive 0: <ST3120022A>
> wd0: 16-sector PIO, LBA48, 114473MB, 234441648 sectors
> wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5
> atapiscsi0 at pciide0 channel 1 drive 0
> scsibus0 at atapiscsi0: 2 targets
> cd0 at scsibus0 targ 0 lun 0: <SONY, CD-ROM CDU5212, 5YS1> SCSI0 5/cdrom
> removable
> cd0(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 2
> pciide1 at pci0 dev 31 function 2 "Intel 82801EB SATA" rev 0x02: DMA,
> channel 0 configured to native-PCI, channel 1 configured to native-PCI
> pciide1: using irq 10 for native-PCI interrupt
> wd1 at pciide1 channel 0 drive 0: <Maxtor 6L300S0>
> wd1: 16-sector PIO, LBA48, 286188MB, 586114704 sectors
> wd1(pciide1:0:0): using PIO mode 4, Ultra-DMA mode 5
> ichiic0 at pci0 dev 31 function 3 "Intel 82801EB/ER SMBus" rev 0x02: irq 3
> iic0 at ichiic0
> adt0 at iic0 addr 0x2e: emc6d10x (ADT7460) rev 65
> isa0 at ichpcib0
> isadma0 at isa0
> pckbc0 at isa0 port 0x60/5
> pckbd0 at pckbc0 (kbd slot)
> pckbc0: using irq 1 for kbd slot
> wskbd0 at pckbd0: console keyboard, using wsdisplay0
> pcppi0 at isa0 port 0x61
> midi0 at pcppi0: <PC speaker>
> spkr0 at pcppi0
> lpt0 at isa0 port 0x378/4 irq 7
> npx0 at isa0 port 0xf0/16: using exception 16
> pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
> fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
> fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
> biomask ff6d netmask ff6d ttymask ffef
> pctr: user-level cycle counter enabled
> uhub5 at uhub4 port 1
> uhub5: Standard Microsystems product 0xa700, rev 2.00/0.00, addr 2
> uhub5: 4 ports with 4 removable, self powered, multiple transaction
> translators
> uhidev0 at uhub5 port 1 configuration 1 interface 0
> uhidev0: Microsoft Microsoft 3-Button Mouse with IntelliEye(TM), rev
> 1.10/3.00, addr 3, iclass 3/1
> ums0 at uhidev0: 3 buttons and Z dir.
> wsmouse0 at ums0 mux 0
> uhidev1 at uhub5 port 2 configuration 1 interface 0
> uhidev1: Microsoft Natural, rev 2.00/2.07, addr 4, iclass 3/1
> ukbd0 at uhidev1: 8 modifier keys, 6 key codes
> wskbd1 at ukbd0 mux 1
> wskbd1: connecting to wsdisplay0
> dkcsum: wd0 matches BIOS drive 0x80
> dkcsum: wd1 matches BIOS drive 0x81
> root on wd0a
> rootdev=0x0 rrootdev=0x300 rawdev=0x302
> umass0 at uhub5 port 3 configuration 1 interface 0
> umass0: JMicron USB to ATA/ATAPI Bridge, rev 2.00/1.00, addr 5
> umass0: using SCSI over Bulk-Only
> scsibus1 at umass0: 2 targets
> sd0 at scsibus1 targ 1 lun 0: <IC35L020, SVPTV153100, A45A> SCSI2
> 0/direct fixed
> sd0: 19458MB, 19458 cyl, 64 head, 32 sec, 512 bytes/sec, 39851760 sec total
