Grub troubles (with raid mirror)

Grub troubles (with raid mirror)

Post by Mathew Fran » Thu, 28 Mar 2002 17:23:12

I cannot get Grub to boot with RH 7.2.   I've spent most of today looking
for the answer - and found the question only many times over.

I have a three-way software mirror of 20GB drives (paranoid!) on an Asus
A7M266, and one Promise Ultra 100 TX2.  (one drive on MB, two on promise)

On bootup the machine halts on "GRUB "

I can happily boot of floppy.

I have tried to re-init Grub, but when I do it tells me "/dev/md0 drive is
not a BIOS drive" (md0 is my mirror device of course)

Here is a dump of fdisk -l if it helps:

    Disk /dev/hdc: 16 heads, 63 sectors, 39870 cylinders
    Units = cylinders of 1008 * 512 bytes

       Device Boot    Start       End    Blocks   Id  System
    /dev/hdc1             1       294    148144+  82  Linux swap
    /dev/hdc3           295     39870  19946304    5  Extended
    /dev/hdc5   *       295     39870  19946272+  fd  Linux raid autodetect

Each drive is identical (except drives are hde and hdg respectively)



1. Linux software RAID mirroring eq. HPT370 RAID mirroring ?

I am trying to install linux (Mandrake 8.0) on a PC (KT7-RAID motherboard)
as a second system for Windows 98. I am using two RAID mirrored disks for
various data and Linux / windows 98 resides on a separate ATA 66 disk on a
"normal" ide controler.
I can boot perfectly both systems, but the problem is that the two mirrored
FAT32 disks appeares as two separate normal disks under Linux and it's
possible to write independently on the two disks ... unsyncing the mirror.

I have a few questions about it :
1) Do i need to install the HPT370 linux patch (even if it doesn't supporte
the mirroring fonction) or is it already included in the Mandrake 8.0 kernel

2) If i can't solve this problem, can i use a software RAID mirror under
linux between the two disks that are mirrored with HPT370 under Windows 98
(i.e. "Hardware HPT370" mirroring and Linux Software mirroring are
compatible ?).

3) What is the VT82C686x bug ? Does it apply to the VT82C686A ship ? How can
it be solve ? Is there other well known bugs of Linux using the KT7-RAID
board ?

Thanks a lot for your help, and please send me a copy of your answers via

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