Computer won't boot from CD
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From: - Bobb - on 8 Apr 2010 11:30 My thoughts: Is the LiveCD loading a DVD/CD driver ? or just a CD driver ? I know I've tried to boot an old CD ( Win98 ? WinXP install CD) and noticed that it failed when it got to " loading OAKCDROM" - then got 'no such device', BECAUSE it was an old CD driver - not a driver for DVD device. Check startup for DEVICE=OAKCDROM.SYS /D:OEMCD001. if so, change that line / file to be a DVD driver for your device. Right now, it loads for a CD drive, then after polling gets a response for a DVD drive and has no idea what " THAT" is. ( With Windows UP, using windows driver and Windows driver knows what a DVD is) >>>> "Edwin Sineath" <piedmont79(a)earthlink.net> wrote in message >>>> news:E8udnSYIHZ3lWC_WnZ2dnUVZ_v6dnZ2d(a)earthlink.com... >>>>> I put in a live CD to boot from, computer doesn't boot from it, boots >>>>> from hard drive. But once it boots up, the CD is recognized so >>>>> apparently there is nothing wrong with the drive. But I don't know >>>>> what is causing this. The BIOS is set to boot from CD first. >>>> >>>> Either the boot priority does not list the CD ahead of the HDD, or the >>>> CD is not bootable. >>>> >>>> >>>> >>>> >>>> >>>> >>> OK, fixed boot priority and verified that the CD is bootable by putting >>> it in another computer. Now when the computer tries to boot this CD, I >>> get a checksum error, and it doesn't boot. If there's something wrong >>> with the CD, why will it work on another computer? BTW, I tried another >>> live-install CD (one that I know works, have used it to install an OS) >>> on this same computer and it also wouldn't boot and gave the checksum >>> error. >> >> >> Then the CD drive is toast. >> >> Boot the machine to the HDD, then put the CD in. If the drive works, the >> CD should start by itself. If the drive is toast, then the CD won't run >> and the checksum error should come up. >> > OK. Did that. The CD shows up. Auto-mounts and I can see what's on it. > This is really strange behavior, isn't it?
From: Jeff Strickland on 8 Apr 2010 11:46 "Edwin Sineath" <piedmont79(a)earthlink.net> wrote in message news:qqednaToP-kIlinWnZ2dnUVZ_q6dnZ2d(a)earthlink.com... > Jeff Strickland wrote: >> "Edwin Sineath" <piedmont79(a)earthlink.net> wrote in message >> news:ec6dnTiHCPJuOS7WnZ2dnUVZ_gSdnZ2d(a)earthlink.com... >>> Jeff Strickland wrote: >>>> "Edwin Sineath" <piedmont79(a)earthlink.net> wrote in message >>>> news:E8udnSYIHZ3lWC_WnZ2dnUVZ_v6dnZ2d(a)earthlink.com... >>>>> I put in a live CD to boot from, computer doesn't boot from it, boots >>>>> from hard drive. But once it boots up, the CD is recognized so >>>>> apparently there is nothing wrong with the drive. But I don't know >>>>> what is causing this. The BIOS is set to boot from CD first. >>>> >>>> Either the boot priority does not list the CD ahead of the HDD, or the >>>> CD is not bootable. >>>> >>>> >>>> >>>> >>>> >>>> >>> OK, fixed boot priority and verified that the CD is bootable by putting >>> it in another computer. Now when the computer tries to boot this CD, I >>> get a checksum error, and it doesn't boot. If there's something wrong >>> with the CD, why will it work on another computer? BTW, I tried another >>> live-install CD (one that I know works, have used it to install an OS) >>> on this same computer and it also wouldn't boot and gave the checksum >>> error. >> >> >> Then the CD drive is toast. >> >> Boot the machine to the HDD, then put the CD in. If the drive works, the >> CD should start by itself. If the drive is toast, then the CD won't run >> and the checksum error should come up. >> >> >> >> >> >> >> >> > OK. Did that. The CD shows up. Auto-mounts and I can see what's on it. > This is really strange behavior, isn't it? Not that strange. A bootable CD has a boot sector, much the same as the boot sector on the HDD. When you bring up the machine, the BIOS looks to see if the CD drive is loaded, and if YES, then it looks for a boot sector. If NO, then Bios moves on to the HDD, if YES, then the CD drive reads the boot information and life goes on. When the boot information is corrupted, the CD will not start the machine. If the boot information works in one machine (CD drive), but not another, then the head alignment on the drive that fails is maladjusted, or the drive is defective. If the boot sector on the CD was bad, then the CD would not boot any machine, but if the drive was having a problem, then the boot sector coule be read on some drives but not others. Just because you replaced the drive does not automatically fix the issue, you have to load the correct drivers for the new hardware. If you drug an old drive out of the closet, then you will have to find a driver for it for the current OS. Let's say that you had an old drive from a Win98 machine, and wanted to use it on Win7. The drivers from 98 won't work, and there is likely no driver to support it for Win7. It sounds as if you have a CD that works minimally, it can read -- and maybe write, but we have not gone down that road yet -- when a CD is put into the tray, but can't read a boot sector. The Boot Sector of a CD is in the very inside track. All CDs write from the center to the outside, which is why those small CDs work, by the way. So, you have a drive that can't get all of the way to the inside track(s), and you replaced it with one that you may not have the correct drivers to support it.
From: - Bobb - on 27 Apr 2010 15:56 "Edwin Sineath" <piedmont79(a)earthlink.net> wrote in message news:E8udnSYIHZ3lWC_WnZ2dnUVZ_v6dnZ2d(a)earthlink.com... >I put in a live CD to boot from, computer doesn't boot from it, boots from >hard drive. But once it boots up, the CD is recognized so apparently there >is nothing wrong with the drive. But I don't know what is causing this. >The BIOS is set to boot from CD first. So the drive is READABLE, but not BOOTABLE
From: baron on 28 Apr 2010 04:51
- Bobb - Inscribed thus: > > "Edwin Sineath" <piedmont79(a)earthlink.net> wrote in message > news:E8udnSYIHZ3lWC_WnZ2dnUVZ_v6dnZ2d(a)earthlink.com... >>I put in a live CD to boot from, computer doesn't boot from it, boots >>from >>hard drive. But once it boots up, the CD is recognized so apparently >>there >>is nothing wrong with the drive. But I don't know what is causing >>this. The BIOS is set to boot from CD first. > > So the drive is READABLE, but not BOOTABLE Try F10 or F12 when switching on. Windows messes with the BIOS redirection table. -- Best Regards: Baron. |