Same here. I believe it has to do with the seconday controller typically not
being the boot device. The bios on the mainboard supports LBA on the
secondary controller, but will not report in by default.
However, where linux is concerned, and like Danilo mentioned, you can used
fdisk in expert mode and manaully key in the LBA values for consistency with
the primary master drive and it will work just fine. In fact, I recommend
it. Just be sure that you are entering in the correct values.
----- Original Message -----
From: "Danilo Godec" <[EMAIL PROTECTED]>
To: "Michael" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Thursday, December 21, 2000 3:05 AM
Subject: Re: bootable raid 1
> On Wed, 20 Dec 2000, Michael wrote:
>
> > This is an issue with the firmware on the drive itself. Intrestingly
> > enough, I have 2 identical (??) 20 gig drives purchased at the same
> > time that report differently to the kernel at boot. When probed, one
> > reports CHS and the other reports LBA values. I haven't checked in
>
> Well, I've noticed a similar situation too. If I have two identical disks
> (even the same firmware revision), one connected to primary, the other to
> secondary IDE controller, the first will report LBA and the later 'normal'
> CHS. If I connect both to primary as master/slave pair, they both report
> LBA values.
>
> This seems to be 'normal', as I've seen it on virtually all
> motherboard/disk combinations.
>
> > Bottom line, it is important to note the probe values reported by the
> > kernel and to use those values to set the bios on the motherboard
> > since fdisk uses the bios values when creating the partitions and it
> > seems like the kernel uses the probe values read from the ide
> > interface. Maybe I haven't got it quite right, but this is as close
> > as I've managed without digging into the code.
>
> You can always use the 'hdx=cyl,head,sectors' to make Linux (and
> fdisk) use the geometry you prefer. I usually adjust the secondary drive
> params to those detected on the primary.
>
>
> D.
>
>
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