-----Original Message----- From: fedora-list-bounces@xxxxxxxxxx on behalf of Dave Ihnat Sent: Fri 09/28/2007 09:13 AM To: Alan Cox Cc: For users of Fedora Subject: Re: How to get the most out of HD space. On Fri, Sep 28, 2007 at 02:07:20PM +0100, Alan Cox wrote: > You can boot from raid1 - but of course its actually booting from the one > disk in reality not from the mirrored set. Ah--*software* RAID1? At boot time, it doesn't know about /dev/mdX. --------------------------- I'm pretty sure the system does know about /dev/mdX at boot time... I'm looking at one of my old RHL 9 servers (Yes... it's due for an upgrade!) and my filesystems are laid out as: Filesystem 1K-blocks Used Available Use% Mounted on /dev/md0 8160056 4111096 3634452 54% / /dev/md2 19891 6232 12632 34% /boot /dev/md3 108963128 101667576 1760508 99% /disk0 and grub.conf says: default=0 timeout=10 splashimage=(hd0,0)/grub/splash.xpm.gz title Red Hat Linux (2.4.20-31.9) root (hd0,0) kernel /vmlinuz-2.4.20-31.9 ro root=/dev/md0 initrd /initrd-2.4.20-31.9.img and the fdisk output: Disk /dev/hdg: 122.9 GB, 122942324736 bytes 16 heads, 63 sectors/track, 238216 cylinders Units = cylinders of 1008 * 512 = 516096 bytes Device Boot Start End Blocks Id System /dev/hdg1 * 1 41 20632+ fd Linux raid autodetect /dev/hdg2 42 16490 8290296 fd Linux raid autodetect /dev/hdg3 16491 18571 1048824 fd Linux raid autodetect /dev/hdg4 18572 238216 110701080 f Win95 Ext'd (LBA) /dev/hdg5 18572 238216 110701048+ fd Linux raid autodetect Disk /dev/hde: 122.9 GB, 122942324736 bytes 16 heads, 63 sectors/track, 238216 cylinders Units = cylinders of 1008 * 512 = 516096 bytes Device Boot Start End Blocks Id System /dev/hde1 * 1 41 20632+ fd Linux raid autodetect /dev/hde2 42 16490 8290296 fd Linux raid autodetect /dev/hde3 16491 18571 1048824 fd Linux raid autodetect /dev/hde4 18572 238216 110701080 f Win95 Ext'd (LBA) /dev/hde5 18572 238216 110701048+ fd Linux raid autodetect and, now, re-reading my email... since grub says "root (hd0,0)" does that indicate that it is only going to read hdg at boot time? If I were to create a second boot option in grub.conf with "root (hd1,0)", then could I get it to boot from hde? I guess there would also have to be a way to tell the BIOS to look at hde for the MBR? Sorry for raising more questions than answers!
<<winmail.dat>>
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