Largest IDE hard drive supported by internal connector
Davis Johnson
davis at frizzen.com
Fri Sep 17 01:17:03 UTC 2004
>
> The original question was what was the size limitation for this
> specific and non-standard controller on the multia...and we got
> sidetracked. Thanks for the info though. I still think that if your
> hard drive is unrecognizable to the hardware itself (which is not
> what I said originally I know, I was wrong about that) it doesn't
> matter what the OS can do.
>
> Ted
>
Most (not all!) IDE interfaces are fairly transparent (and dumb). In
most cases the hardware interface doesn't realy recognize drives. The
BIOS may or may not recognize a large drive. The BIOS may recognize the
drive but only see as much of the disk as it understands. This happens a
lot with older PC bioses. In this case it is possible to create a
partition that falls entirly within the part of the disk the BIOS
understands. This should be a bootable configuration. Once the kernel is
loaded and you are using the kernel driver and not the BIOS the whole
disk will be available. This allows all your mounted partitions,
including root, to be past the BIOS limit.
If the BIOS refuses to cooperate at all you may get away with two
drives, one to boot off of and one to be big.
Some IDE controlers are not that transparent. Hardware RAID controlers
definatly aren't transparent. In this case, if the controler firmware
won't recognize the drive you are out of luck.
As cheap as IDE drives have gotten I'd suggest giving it a shot if you
can get the cable issues solved. I wouldn't worry too much about the
difference between IDE and EIDE either. An EIDE drive will still support
IDE transfer modes, and your IDE controler will probably pass EIDE
commands without even looking at them.
More information about the axp-list
mailing list