On Wed, Jul 01, 2009 at 12:46:45PM +0600, Sergey Yudin wrote:
> How to understand in installation time which geometry is "correct" for
> curent disk? What is the starting point for calculations? Number of
> sectors?
In some cases thedisk is queried, and in other cases not.
But geomtery is largely irrelevant these days.
-Otto
>> In which case, if you want to set it right, your best bet is to say
>> 'No' to letting OpenBSD use the whole disk, then setting the correct
>> geometry by hand.
>>
>> JMTC
>>
>>
>>>>> Please can someone tell why disk geometry changed after install
>>>>>
>>>>> in installation time on empty sd0:
>>>>>
>>>>> Disk: sd0 geometry: 78753/2/911 [143638992 Sectors]
>>>>> Offset: 0 Signature: 0x0
>>>>> Starting Ending LBA Info:
>>>>> #: id C H S - C H S [ start: size ]
>>>>>
>>>>> -------------------------------------------------------------------------------
>>>>> 0: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
>>>>> 1: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
>>>>> 2: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
>>>>> 3: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
>>>>>
>>>>>
>>>> This is a garbage MBR. Look at the signature and the crazy geometry.
>>>>
>>>>
>>> no it is not a garbage.. It's just zero filled disk. Geometry detection
>>> process uses info from preexisting partition table?
>>>
>>>
>>>> -Otto
>>>>
>>>>
>>>>> after install geometry shown as:
>>>>>
>>>>> Disk: sd0 geometry: 8941/255/63 [143638992 Sectors]
>>>>> Offset: 0 Signature: 0xAA55
>>>>> Starting Ending LBA Info:
>>>>> #: id C H S - C H S [ start: size ]
>>>>>
>>>>> -------------------------------------------------------------------------------
>>>>> 0: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
>>>>> 1: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
>>>>> 2: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
>>>>> *3: A6 0 14 30 - 8931 181 48 [ 911: 143487055 ]
>>>>> OpenBSD
>>>>>
>>>>> thanks a lot
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> OpenBSD 4.5 (GENERIC) #1749: Sat Feb 28 14:51:18 MST 2009
>>>>> dera...@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC
>>>>> cpu0: Intel Pentium II ("GenuineIntel" 686-class, 512KB L2 cache) 350 MHz
>>>>> cpu0:
>>>>>
>>>>> FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR
>>>>> real mem = 268005376 (255MB)
>>>>> avail mem = 250855424 (239MB)
>>>>> mainbus0 at root
>>>>> bios0 at mainbus0: AT/286+ BIOS, date 09/30/98, BIOS32 rev. 0 @ 0xfd760
>>>>> mpbios0 at bios0: Intel MP Specification 1.4
>>>>> cpu0 at mainbus0: apid 0 (boot processor)
>>>>> cpu0: apic clock running at 99MHz
>>>>> mpbios0: bus 0 is type PCI mpbios0: bus 1 is type PCI mpbios0: bus 2 is
>>>>> type PCI mpbios0: bus 3 is type ISA ioapic0 at mainbus0: apid 1 pa
>>>>> 0xfec00000, version 11, 24 pins
>>>>> pcibios0 at bios0: rev 2.1 @ 0xfd760/0x8a0
>>>>> pcibios0: PCI IRQ Routing Table rev 1.0 @ 0xfdef0/240 (13 entries)
>>>>> pcibios0: PCI Interrupt Router at 000:02:0 ("Intel 82371FB ISA" rev 0x00)
>>>>> pcibios0: PCI bus #2 is the last bus
>>>>> WARNING: can't reserve area for I/O APIC.
>>>>> bios0: ROM list: 0xc0000/0x8000 0xc8000/0x5000 0xcd000/0x800
>>>>> pci0 at mainbus0 bus 0: configuration mode 1 (bios)
>>>>> pchb0 at pci0 dev 0 function 0 "Intel 82443BX AGP" rev 0x02
>>>>> intelagp0 at pchb0
>>>>> agp0 at intelagp0: aperture at 0x10000000, size 0x4000000
>>>>> ppb0 at pci0 dev 1 function 0 "Intel 82443BX AGP" rev 0x02
>>>>> pci1 at ppb0 bus 1
>>>>> piixpcib0 at pci0 dev 2 function 0 "Intel 82371AB PIIX4 ISA" rev 0x02
>>>>> pciide0 at pci0 dev 2 function 1 "Intel 82371AB IDE" rev 0x01: DMA,
>>>>> channel 0 wired to compatibility, channel 1 wired to compatibility
>>>>> pciide0: channel 0 ignored (disabled)
>>>>> pciide0: channel 1 ignored (disabled)
>>>>> uhci0 at pci0 dev 2 function 2 "Intel 82371AB USB" rev 0x01: apic 1 int
>>>>> 19 (irq 11)
>>>>> piixpm0 at pci0 dev 2 function 3 "Intel 82371AB Power" rev 0x02: SMI
>>>>> iic0 at piixpm0
>>>>> spdmem0 at iic0 addr 0x50: 128MB SDRAM ECC PC100CL3
>>>>> spdmem1 at iic0 addr 0x51: 128MB SDRAM ECC PC100CL3
>>>>> fxp0 at pci0 dev 3 function 0 "Intel 8255x" rev 0x05, i82558: apic 1 int
>>>>> 16 (irq 9), address 00:c0:0d:00:94:4f
>>>>> inphy0 at fxp0 phy 1: i82555 10/100 PHY, rev. 0
>>>>> vga1 at pci0 dev 4 function 0 "Cirrus Logic CL-GD5430" rev 0x22
>>>>> wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
>>>>> wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
>>>>> ppb1 at pci0 dev 5 function 0 "DEC 21150 PCI-PCI" rev 0x04
>>>>> pci_intr_map: bus 0 dev 5 func 0 pin 1; line 9
>>>>> pci_intr_map: no MP mapping found
>>>>> pci_intr_map: bus 0 dev 5 func 0 pin 2; line 10
>>>>> pci_intr_map: no MP mapping found
>>>>> pci_intr_map: bus 0 dev 5 func 0 pin 3; line 9
>>>>> pci_intr_map: no MP mapping found
>>>>> pci_intr_map: bus 0 dev 5 func 0 pin 4; line 11
>>>>> pci_intr_map: no MP mapping found
>>>>> pci2 at ppb1 bus 2
>>>>> ahc0 at pci2 dev 1 function 0 "Adaptec AIC-7890/1 U2" rev 0x00: apic 1
>>>>> int 17 (irq 10)
>>>>> scsibus0 at ahc0: 16 targets, initiator 7
>>>>> sd0 at scsibus0 targ 0 lun 0: <FUJITSU, MAW3073NC, 0104> SCSI3 0/direct
>>>>> fixed
>>>>> sd0: 70136MB, 512 bytes/sec, 143638992 sec total
>>>>> ahc1 at pci2 dev 9 function 0 "Adaptec AIC-7890/1 U2" rev 0x00: apic 1
>>>>> int 17 (irq 10)
>>>>> scsibus1 at ahc1: 16 targets, initiator 7
>>>>> cd0 at scsibus1 targ 5 lun 0: <PLEXTOR, CD-ROM PX-32TS, 1.03> SCSI2
>>>>> 5/cdrom removable
>>>>> eap0 at pci0 dev 20 function 0 "Ensoniq AudioPCI97" rev 0x06: apic 1 int
>>>>> 16 (irq 9)
>>>>> ac97: codec id 0x83847609 (SigmaTel STAC9721/23)
>>>>> ac97: codec features 18 bit DAC, 18 bit ADC, SigmaTel 3D
>>>>> audio0 at eap0
>>>>> midi0 at eap0: <AudioPCI MIDI UART>
>>>>> isa0 at piixpcib0
>>>>> isadma0 at isa0
>>>>> com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
>>>>> com1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
>>>>> 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
>>>>> midi1 at pcppi0: <PC speaker>
>>>>> spkr0 at pcppi0
>>>>> lpt0 at isa0 port 0x378/4 irq 7
>>>>> npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
>>>>> fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
>>>>> fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
>>>>> usb0 at uhci0: USB revision 1.0
>>>>> uhub0 at usb0 "Intel UHCI root hub" rev 1.00/1.00 addr 1
>>>>> mtrr: Pentium Pro MTRR support
>>>>> softraid0 at root
>>>>> ahc0: target 0 using 16bit transfers
>>>>> ahc0: target 0 synchronous at 40.0MHz, offset = 0x7f
>>>>> root on sd0a swap on sd0b dump on sd0b
