On 09/16/2011 08:10 AM, Jerry Geis wrote: > On 09/16/2011 06:59 AM, Steve Clark wrote: >> On 09/15/2011 06:03 PM, Jerry Geis wrote: >>>> I think the fdisk in 6 tries to align on 4k boundaries. Does fdisk -c do the >>>> same thing? >>>> >>> Scott - thanks I just tried -cu and same result. >>> >>> jerry >>> >>> _______________________________________________ >>> CentOS mailing list >>> CentOS at centos.org >>> http://lists.centos.org/mailman/listinfo/centos >>> >> have you tried sfdisk? >> >> > Steve - I had not - but asking sfdisk to list the device on centos has > the wrong geometry to start > with just like fdisk does. it should be 255 heads and 63 sectors. > > sfdisk -v > sfdisk (util-linux-ng 2.17.2) > > sfdisk -l /dev/sde > > Disk /dev/sde: 1022 cylinders, 247 heads, 62 sectors/track > Warning: The partition table looks like it was made > for C/H/S=*/255/63 (instead of 1022/247/62). > For this listing I'll assume that geometry. > Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0 > > Device Boot Start End #cyls #blocks Id System > /dev/sde1 * 0+ 974- 975- 7830616+ b W95 FAT32 > end: (c,h,s) expected (974,221,63) found (1023,254,63) > /dev/sde2 0 - 0 0 0 Empty > /dev/sde3 0 - 0 0 0 Empty > /dev/sde4 0 - 0 0 0 Empty > > > ---------------- > This is centos 5 > sfdisk -v > sfdisk (util-linux 2.13-pre7) > > sfdisk -l /dev/sdb > > Disk /dev/sdb: 974 cylinders, 255 heads, 63 sectors/track > Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0 > > Device Boot Start End #cyls #blocks Id System > /dev/sdb1 * 0+ 851 852- 6843658+ 83 Linux > /dev/sdb2 852 973 122 979965 82 Linux swap / Solaris > /dev/sdb3 0 - 0 0 0 Empty > /dev/sdb4 0 - 0 0 0 Empty > > Hmm... I have an automated script that installs C6 on devices - I have used it on sata drives, ssds and CF. The first thing I do is dd of=$DRIVE if=/dev/zero bs=1024 count=1 to wipe out the existing partition table then I do # 1MB = 2048 512byte sectors DSIZE=`sfdisk -s -uS $DRIVE` DSIZE=$((DSIZE*2)) Log "DSIZE is $DSIZE" #OFFSET=2048 OFFSET=8 SWAP=1000000 BOOT=600000 PSIZE=$(((DSIZE-(OFFSET+BOOT+SWAP+10))/2)) PSIZE=$((PSIZE+(PSIZE%2))) PSTART=$((PSIZE+BOOT+SWAP+OFFSET)) Log "PSIZE is $PSIZE" Log "PSTART is $PSTART" # partition the disk for /boot, swap, / #/sbin/sfdisk -q -uS $DRIVE << EOF #8,600000,L,* #,1000000,S #,,L #EOF /sbin/sfdisk -f -q -uS $DRIVE << EOF $OFFSET,$BOOT,L,* $((OFFSET+BOOT)),$SWAP,S $((OFFSET+BOOT+SWAP)),$PSIZE,L $PSTART,,L EOF I am creating two linux partitions and a swap partition. The swap is fixed and the two linux partitions are approximately equal. I have had no problem booting C6 after doing this. -- Stephen Clark *NetWolves* Sr. Software Engineer III Phone: 813-579-3200 Fax: 813-882-0209 Email: steve.clark at netwolves.com http://www.netwolves.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20110916/1839db73/attachment-0005.html>