Le mer. 14 mars 2012 09:08:46 CET, Peter Kjellström a écrit:
On Tuesday 13 March 2012 13.20.01 m.roth@5-cent.us wrote:
Peter Kjellström wrote:
On Tuesday 13 March 2012 13.41.53 Philippe Naudin wrote:
Hello,
I am confused by a warning from mkswap :
When making a swap on a LVM volume, I see the following warning : mkswap: /dev/vg_SDB1/swap_test6_64: warning: don't erase bootbits
...
<snip> Are you making swap from a logical partition, or a swapfile? If the former, perhaps recreating the partition might help.
Don't confuse the poor guy. 1) yes he's doing mkswap on an lv which was obvious had you read the post 2) an lv does not have a partition table so your statement about recreating it makes no sense.
Thanks all for your answers.
Actually, my problem concern lvm, not mkswap. I don't know yet if I have completely messed with vgcreate/lvcreate or if what I get is due to some difference between CentOS-5 and CentOS-6, but all my logical volumes seem to appear as distinct disks.
On a CentOS-6 machine :
$ lvcreate -L 10M --name try_lvcreate --zero=y VolGroup Rounding up size to full physical extent 12.00 MiB Logical volume "try_lvcreate" created
$ fdisk -l <snip the "normal" partitions table for /dev/sda>
Disk /dev/mapper/VolGroup-try_lvcreate: 12 MB, 12582912 bytes 255 heads, 63 sectors/track, 1 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000
Disk /dev/mapper/VolGroup-try_lvcreate doesn't contain a valid partition table
$ mkswap /dev/mapper/VolGroup-try_lvcreate mkswap: /dev/mapper/VolGroup-try_lvcreate: warning: don't erase bootbits sectors on whole disk. Use -f to force. Setting up swapspace version 1, size = 12284 KiB no label, UUID=be229ca5-bcb9-4116-87fc-8878abb44742
The same commands on a CentOS-5 machine give me a completely different output. Can you guess where I have messed, or is this behavior correct on CentOS-6 ?
Thanks,