On 09/16/2011 08:37 AM, Steve Clark wrote:
> 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
>>>>
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>>> 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.
>
>
Steve,
Thanks - I will try this script probably Monday - heading out today.
Jerry
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