[Linux-cluster] EFI in CLVM

[Paras pradhan]

Removed the first few blocks and last cylinder successfully.So no GPT
signatures now.

pvcreate and vgcreate were successfully but not the lvcreate again.

*pvs o/p:*

  /dev/mpath/mpath13                             prd_vg10 lvm2 a-      2.00T
2.00T

*vgs o/p:*

 prd_vg10   1   0   0 wz--nc    2.00T 2.00T


*lvcreate o/p:*

lvcreate -n prd_vg10_lv -L2047G prd_vg10

Error locking on node prd3: device-mapper: create ioctl failed: Device or
resource busy
  Error locking on node prd1: device-mapper: create ioctl failed: Device or
resource busy
  Error locking on node prd2: device-mapper: create ioctl failed: Device or
resource busy



Now since I don't have device partitions, I don't care about kapartx . Am I
correct?

Paras.



On Fri, Aug 12, 2011 at 12:17 PM, Randy Zagar <zagar at arlut.utexas.edu>wrote:

> On Fri, Aug 12, 2011 at 10:14 AM, Paras Pradhan wrote:
>
>> On Fri, Aug 12, 2011 at 7:39 AM, Alan Brown <ajb2 at mssl.ucl.ac.uk> wrote:
>>
>>  Paras pradhan wrote:
>>>
>>>  Hi,
>>>>
>>>> I have a 2199GB LUN assigned to my 3 node cluster. Since its >2TB, I
>>>> used
>>>> parted to create the EFI GPT parittion. After that pvcreate and vgcreate
>>>> were successfull but I get the following error when doing lvcreate.
>>>>
>>>>
>>>>  If the entire LUN is a PV then you don't need to partition it.
>>>
>>
>>
>> You mean don't use parted or any and directly proceed to pvcreate?
>>
> That's correct.  Pvcreate can be used on raw unpartitioned devices (e.g.
> pvcreate /dev/sdc).
>
> If you try to do this on your disks, I'm pretty sure pvcreate will
> complain/abort because it detects an existing partition table...
>
> Personally, I find GPT partition tables to be annoying... (a) because I
> have to use "parted", and (b) because they're so difficult to erase from a
> disk.
>
> If you want to get rid of that GPT partition table, you'll have to zero out
> (dd if=/dev/zero ...) the first three blocks AND the entire last cylinder of
> your disk to obliterate all traces of it (there's a backup GPT partition
> table hiding in the last cylinder).
>
> -RZ
>
>
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> Linux-cluster at redhat.com
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