pvcreate issues
Hi,
We have a SAN that exports 4 LUNs. These appear as SCSI devices on the server (/dev/sd[c-f]). When I try to create physical volumes on these devices, I get the following error:
#>pvcreate /dev/sdc
Physical volume "/dev/sdc" successfully created
#>pvcreate /dev/sdd
Found duplicate PV ZlhU50ejJ1VkoULTcU5ODsl2BP26IjQW: using /dev/sdc
not /dev/sdd
Found duplicate PV ZlhU50ejJ1VkoULTcU5ODsl2BP26IjQW: using /dev/sde
not /dev/sdd
Found duplicate PV ZlhU50ejJ1VkoULTcU5ODsl2BP26IjQW: using /dev/sdf
not /dev/sdd
Physical volume "/dev/sdd" successfully created
This happens after pvcreate is run the second time, does not matter in which order. It looks like when pvcreate sets the device id, it somehow sets it for all the devices.
Debian/Sarge
pvcreate --version
LVM version: 2.01.04 (2005-02-09)
Library version: 1.01.00-ioctl (2005-01-17)
Driver version: 4.4.0
Thanks for any ideas.
Signature · 2 lines
Arshavir Grigorian Systems Administrator/Engineer
Quoted 18 lines · Arshavir Grigorian
Hi,
We have a SAN that exports 4 LUNs. These appear as SCSI devices on the server (/dev/sd[c-f]). When I try to create physical volumes on these devices, I get the following error:
#>pvcreate
/dev/sdc
Physical volume "/dev/sdc" successfully created#>pvcreate
/dev/sdd
Found duplicate PV ZlhU50ejJ1VkoULTcU5ODsl2BP26IjQW: using/dev/sdc
not/dev/sdd
Found duplicate PV ZlhU50ejJ1VkoULTcU5ODsl2BP26IjQW: using/dev/sde
not/dev/sdd
Found duplicate PV ZlhU50ejJ1VkoULTcU5ODsl2BP26IjQW: using/dev/sdf
not/dev/sdd
Physical volume "/dev/sdd" successfully created
Quoted 3 lines
This happens after pvcreate is run the second time, does not matter in which order. It looks like when pvcreate sets the device id, it somehow sets it for all the devices.
You're sure sd[c-f] is not the same device on multiple paths?
Signature · 8 lines
AJ Lewis Voice: 612-638-0500 Red Hat Inc. E-Mail: [email protected] 720 Washington Ave. SE, Suite 200 Minneapolis, MN 55414 Current GPG fingerprint = D9F8 EDCE 4242 855F A03D 9B63 F50C 54A8 578C 8715 Grab the key at: http://people.redhat.com/alewis/gpg.html or one of the many keyservers out there...
Quoted 18 lines · AJ Lewis
Quoted 16 lines · Arshavir Grigorian
Hi,
We have a SAN that exports 4 LUNs. These appear as SCSI devices on the server (/dev/sd[c-f]). When I try to create physical volumes on these devices, I get the following error:
#>pvcreate
/dev/sdc
Physical volume "/dev/sdc" successfully created#>pvcreate
/dev/sdd
Found duplicate PV ZlhU50ejJ1VkoULTcU5ODsl2BP26IjQW: using/dev/sdc
not/dev/sdd
Found duplicate PV ZlhU50ejJ1VkoULTcU5ODsl2BP26IjQW: using/dev/sde
not/dev/sdd
Found duplicate PV ZlhU50ejJ1VkoULTcU5ODsl2BP26IjQW: using/dev/sdf
not/dev/sdd
Physical volume "/dev/sdd" successfully created
Quoted 5 lines
Quoted 1 line
This happens after pvcreate is run the second time, does not matter in which order. It looks like when pvcreate sets the device id, it somehow sets it for all the devices.
You're sure sd[c-f] is not the same device on multiple paths?
How can I be sure? How do I check?
This SAN exports another set of 4 LUNs to a different server and they work just fine.
pvcreate --version
LVM version: 2.00.33 (2005-01-07)
Library version: 1.00.19-ioctl (2004-07-03)
Driver version: 4.4.0
pvcreate on the server that does not work is a little newer, so I wonder if there was any new code/bug fix(es) since this version that caused a regression.
Signature · 2 lines
Arshavir Grigorian Systems Administrator/Engineer
Quoted 5 lines
Quoted 3 lines · AJ Lewis
On Mon, May 23, 2005 at 02:48:11PM -0400, Arshavir Grigorian wrote:
Quoted 7 lines
Quoted 2 lines
You're sure sd[c-f] is not the same device on multiple paths?
How can I be sure? How do I check?
This SAN exports another set of 4 LUNs to a different server and they work just fine.
It does look like you're seing the same disk through four different paths. What OS is the other server running? The people that setup the SAN should know if it is multi pathed or not.
Signature · 5 lines
--- Henrik Morsing [email protected] www.morsing.cc ---
Quoted 10 lines · Henrik Morsing
Quoted 10 lines
Quoted 5 lines · AJ Lewis
On Mon, May 23, 2005 at 02:48:11PM -0400, Arshavir Grigorian wrote:
You're sure sd[c-f] is not the same device on multiple paths?
How can I be sure? How do I check?
Quoted 8 lines
Quoted 2 lines
This SAN exports another set of 4 LUNs to a different server and they work just fine.
It does look like you're seing the same disk through four different paths. What OS is the other server running? The people that setup the SAN should know if it is multi pathed or not.
Thanks.
Looks like it might be a problem with the type of firmware we have on the SAN which only allows for one active fiber channel controller at a time. The second controller should be used only when the first one fails. What we were doing was to export the first set of 4 volumes through one controller and another set of 4 on the other controller, hence the problem. We will either have to change the firmware to allow for 2 active controllers (no failover spare) or buy a switch to make all the volumes accessible to more than one server through the first fc controller.
Signature · 2 lines
Arshavir Grigorian Systems Administrator/Engineer