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Changing SATA bios mode from native SATA to IDE - file or volume accessissues
Say that I have a system with a SATA drive, and it's running XP, and the
drive was formatted as NTFS, and in the BIOS I have my SATA drive being controlled by the on-board SATA controller. Hypothetically, if in the bios I changed the configuration such that my SATA drive was being emulated as an IDE drive, would you expect that the drive would no longer boot into XP? Or perhaps it would - but only into safe mode? |
#2
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Changing SATA bios mode from native SATA to IDE - file or volumeaccess issues
On Oct 15, 3:39*am, DOS Guy wrote:
Say that I have a system with a SATA drive, and it's running XP, and the drive was formatted as NTFS, and in the BIOS I have my SATA drive being controlled by the on-board SATA controller. Hypothetically, if in the bios I changed the configuration such that my SATA drive was being emulated as an IDE drive, would you expect that the drive would no longer boot into XP? Or perhaps it would - but only into safe mode? The type of drive is not an issue. as logically they are the same. I am not sure exactly what you mean by emulate, but the important thing is that the BIOS detects the drive. The only problem I would expect is making sure that the BIOS is set up to boot from the correct physical drive Michael |
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Changing SATA bios mode from native SATA to IDE - file or volumeaccess issues
" wrote:
I am not sure exactly what you mean by emulate, but the important thing is that the BIOS detects the drive. Obviously you are not aware that SATA controllers that are built into motherboards and secondary controller cards require their own 32-bit driver for windows, and that for compatability reasons most of them have bios options to appear as generic IDE drives so that Windows (NT-based windows that is) will have the correct drivers to access them during installation. NT-based OS's do not use the bios int13 routines to access the hard drive. Win-9x will use the bios routines when it doesn't have the proper drivers for the controller in question - this is known as "dos-compatibility-mode drive access, or 16-bit drive access". |
#4
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Changing SATA bios mode from native SATA to IDE - file or volume access issues
DOS Guy wrote:
Say that I have a system with a SATA drive, and it's running XP, and the drive was formatted as NTFS, and in the BIOS I have my SATA drive being controlled by the on-board SATA controller. Hypothetically, if in the bios I changed the configuration such that my SATA drive was being emulated as an IDE drive, would you expect that the drive would no longer boot into XP? Or perhaps it would - but only into safe mode? It should not make a difference. However once booted XP will think it is on a different drive and controller now and will do a new controller detection. You will also lose hotplyg ability if you had it before, but it is pretty meaningless on the system drive anyways. It may play a role for potential other drives on that controller. Arno |
#5
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Changing SATA bios mode from native SATA to IDE - file or volumeaccess issues
Arno wrote:
It should not make a difference. I'm thinking that an XP system that was installed with SATA drivers, with the controller in SATA -mode, will not be able to boot if the controller is put into IDE-compatibility mode in the bios setup. Reason being that the system drivers would have incorporated the SATA drivers (not the IDE drivers) to perform 32-bit drive access, and upon loading them the system would find no drives attached to the SATA controller or might not even find the sata controller - because the controller is now emulating an IDE interface. |
#6
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Changing SATA bios mode from native SATA to IDE - file or volume access issues
DOS Guy wrote:
Arno wrote: It should not make a difference. I'm thinking that an XP system that was installed with SATA drivers, with the controller in SATA -mode, will not be able to boot if the controller is put into IDE-compatibility mode in the bios setup. XP always has on-board IDE drivers and the BIOS is doint the first stage anyways. Reason being that the system drivers would have incorporated the SATA drivers (not the IDE drivers) to perform 32-bit drive access, and upon loading them the system would find no drives attached to the SATA controller or might not even find the sata controller - because the controller is now emulating an IDE interface. See above. And, BTW, I have done this. Arno |
#7
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Changing SATA bios mode from native SATA to IDE - file or volume access issues
On Thu, 15 Oct 2009 10:18:10 -0400, DOS Guy put finger
to keyboard and composed: Arno wrote: It should not make a difference. I'm thinking that an XP system that was installed with SATA drivers, with the controller in SATA -mode, will not be able to boot if the controller is put into IDE-compatibility mode in the bios setup. Reason being that the system drivers would have incorporated the SATA drivers (not the IDE drivers) to perform 32-bit drive access, and upon loading them the system would find no drives attached to the SATA controller or might not even find the sata controller - because the controller is now emulating an IDE interface. AFAIK, if an IDE drive is cloned to a SATA drive, then the SATA drive will be unable to boot unless it is connected in IDE-compatibility mode. You are going the other way, though. - Franc Zabkar -- Please remove one 'i' from my address when replying by email. |
#8
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Changing SATA bios mode from native SATA to IDE - file or volume access issues
Franc Zabkar wrote:
On Thu, 15 Oct 2009 10:18:10 -0400, DOS Guy put finger to keyboard and composed: Arno wrote: It should not make a difference. I'm thinking that an XP system that was installed with SATA drivers, with the controller in SATA -mode, will not be able to boot if the controller is put into IDE-compatibility mode in the bios setup. Reason being that the system drivers would have incorporated the SATA drivers (not the IDE drivers) to perform 32-bit drive access, and upon loading them the system would find no drives attached to the SATA controller or might not even find the sata controller - because the controller is now emulating an IDE interface. AFAIK, if an IDE drive is cloned to a SATA drive, then the SATA drive will be unable to boot unless it is connected in IDE-compatibility mode. You are going the other way, though. Not really. The drive will still boot. However the OS may not have the drivers and may not be able to access the drive after kernel load. If the driver is present, it is not a problem. Some braindead OS designs (Windows) make it difficult to install the driver when the hardware is not present though. Arno |
#9
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Changing SATA bios mode from native SATA to IDE - file or volume access issues
Ignore Arnie, he doesn't have a clue.
Why don't you just try it? At worse it fails to boot, and you restore BIOS setting. If you have a PATA port using IDE driver, then atapi.sys is installed. "DOS Guy" wrote in message ... Arno wrote: It should not make a difference. I'm thinking that an XP system that was installed with SATA drivers, with the controller in SATA -mode, will not be able to boot if the controller is put into IDE-compatibility mode in the bios setup. Reason being that the system drivers would have incorporated the SATA drivers (not the IDE drivers) to perform 32-bit drive access, and upon loading them the system would find no drives attached to the SATA controller or might not even find the sata controller - because the controller is now emulating an IDE interface. |
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