I just do not get this. I have read the manual and Im still in the fog I used to install FreeBSD and when it came to fdisk, I have ignored the following warning:
"WARNING: A gemotry of 310101/16/63 for ad0 is incorrect, using a more likely geometry. If this geometry is incorrect or you are unsure as to wheteher or not it is correct please consult the Hardware Guide int the doc submenu or use the (G)eom command to change it now" It was no problem at all, since when I have started to use raid mirror with g(eom)mirror. The problem came when after reboot the system recognized different C/H/S values for the identical disks. According to dmesg it was either 310098/16/63, or sometimes: 310101/16/63 The BIOS setting was autodetect for both drives. And gmirror complained, that one drive is smaller then the other, so the mirror has been destroyed ... I thought I should dig this up, since its realy uneasy situation. The fdisk warning advises to read the Hardware Guide in the doc submenu, though this section doesn't have a word about geometry. The Handbook Allocating Disk Space chapter says: "FreeBSD does not use the BIOS, and does not know the ``logical BIOS drive mapping''. This can lead to very perplexing situations, especially when drives are physically identical in geometry, and have also been made as data clones of one another. When using FreeBSD, always restore the BIOS to natural drive numbering before installing FreeBSD, and then leave it that way. If you need to switch drives around, then do so, but do it the hard way, and open the case and move the jumpers and cables." Peplexing situations ... and realy Sysinstal/fdisk says "Remember: you need to enter whatever your BIOS thinks the geometry is!" Ok, bios can think 3 things: 65535/16/255 CHS 4095/240/255 Large 16643/255/63 LBA If I say CHS or Large values at the geom prompt, I receive the same message: "WARNING: A gemotry of xxx/xxx/xxx is incorrect". Only the LBA values are accepted, though 16643/255/63 results 130551 Mb, which is much lower than 152625 Mb with the propused 19457/255/63 values by fdisk. I thought I accept the values 19457/255/63, and it stores this somewhere, though on next sysinstall it still complains about this. So what mode (CHS,LBA,Large) should I set in the BIOS (autodetect seems to be riksy ...) ? What geometry should I use in sysinstall/fdisk ? Will this geometry warning always come ? Will dmesg output ever display a correct value instead of 310098/16/63 ? _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
