[linux-lvm] LVM preference for multipath verses disk/by-id/scsi
Simon Loewenthal/NL/Tele2
simon.loewenthal at tele2.com
Mon Jan 11 14:12:44 UTC 2010
Hi,
Did anyone ever know why this happens?
With write_cache_state = 0 the PV Name displays the multipathed discs
but with write_cache_state = 1 then the PV Name displays the dm disc
name eg.
This:
PV Name /dev/mapper/EMC_00FD
verses:
PV Name /dev/dm-16
How do I really know LVM is really using the mutlipath other than
disabling one of the ports on the switch, which I don't wish to do on a
production box.
Regards, S.
Simon Loewenthal/NL/Tele2 wrote:
> More info:
>
> I thought for a moment that LVM might cache the devices somewhere other
> than in the cache but am unsure as per output from strace :-
>
> # grep -i cach typescript.*
> typescript.pvscan:open("/etc/ld.so.cache", O_RDONLY) = 3
> typescript.pvscan:open("/usr/lib64/gconv/gconv-modules.cache", O_RDONLY) = 3
> typescript.pvscan:stat("/etc/lvm/.cache", 0x7fff2193b6d0) = -1 ENOENT
> (No such file or directory)
> typescript.vgscan:open("/etc/ld.so.cache", O_RDONLY) = 3
> typescript.vgscan:open("/usr/lib64/gconv/gconv-modules.cache", O_RDONLY) = 3
> typescript.vgscan:stat("/etc/lvm/.cache", 0x7fff8d6ad440) = -1 ENOENT
> (No such file or directory)
>
>
>
> Simon Loewenthal/NL/Tele2 wrote:
>
>> Update:
>>
>> I modified the filter to read:
>> filter = [ "r|/dev/.*/by-path/.*|", "r|/dev/.*/by-id/.*|",
>> "r|/dev/dm-*|" , "a|/dev/mapper/EMC*|", "a|/dev/cciss/*|" , "r/.*/" ]
>>
>> and this made no difference.
>>
>> What did work was to turn off the cache and delete the .cache file:
>> write_cache_state = 0
>>
>> Then the discs were brought in as so:
>> PV Name /dev/mapper/EMC_00FD
>> PV UUID ctz8rd-ew58-0pU8-FssR-x9pR-KSA9-mI4flw
>> PV Status allocatable
>> Total PE / Free PE 539 / 0
>>
>>
>> Howevr, as soon as I activated the cache:
>> write_cache_state = 1
>> then the discs in the volume group magically reverted to
>>
>> PV Name /dev/dm-16
>> PV UUID ctz8rd-ew58-0pU8-FssR-x9pR-KSA9-mI4flw
>> PV Status allocatable
>> Total PE / Free PE 539 / 0
>>
>>
>> Any clues?
>>
>> Simon Loewenthal/NL/Tele2 wrote:
>>
>>
>>> I just this on a system with these in the lvm.conf:
>>> preferred_names = [ "^/dev/mapper/EMC_", "^/dev/[hs]d", "^/dev/cciss" ]
>>> filter = [ "r|/dev/.*/by-path/.*|", "r|/dev/.*/by-id/.*|",
>>> "a|/dev/mapper/EMC_*|", "a|/dev/cciss/*|" , "r/.*/" ]
>>>
>>>
>>> After a pvscan and vgscan I did a vgimport. Guess what: A vgimport of
>>> the volume group ignored the filters and preferred devices and imported
>>> the vg with these PVs (only one PV shown for brevity, but the rest are
>>> similar ):
>>>
>>> PV Name /dev/dm-16
>>> PV UUID ctz8rd-ew58-0pU8-FssR-x9pR-KSA9-mI4flw
>>> PV Status allocatable
>>> Total PE / Free PE 539 / 0
>>>
>>> Unless, /dev/dm-16 is really some abstracted link back to a multipathed
>>> device but I cannot work out this bit:
>>> # ls -l /dev/mapper/
>>> total 0
>>> brw------- 1 root root 253, 17 Dec 30 15:11 EMC_0012
>>> [SNIP]
>>>
>>> # dmsetup ls
>>> EMC_0103 (253, 13)
>>> EMC_00FF (253, 15)
>>> EMC_0101 (253, 14)
>>> EMC_00FD (253, 16)
>>> vg00-app052 (253, 3)
>>> vg00-xen (253, 2)
>>> vg00-usr (253, 0)
>>> EMC_0113 (253, 4)
>>> vg00-var (253, 1)
>>> EMC_0012 (253, 17)
>>> EMC_010F (253, 6)
>>> EMC_0109 (253, 10)
>>> EMC_0111 (253, 5)
>>> EMC_010D (253, 8)
>>> EMC_0107 (253, 11)
>>> EMC_010B (253, 9)
>>> EMC_0105 (253, 12)
>>>
>>>
>>> The output of pvscan and vgscan follow:
>>>
>>> *PVSCAN*
>>> # pvscan -vv
>>> Setting global/locking_type to 1
>>> File-based locking selected.
>>> Setting global/locking_dir to /var/lock/lvm
>>> Wiping cache of LVM-capable devices
>>> Wiping internal VG cache
>>> Walking through all physical volumes
>>> /dev/cciss/c0d0: size is 286677120 sectors
>>> /dev/cciss/c0d0p1: size is 208782 sectors
>>> /dev/cciss/c0d0p1: size is 208782 sectors
>>> /dev/cciss/c0d0p1: No label detected
>>> /dev/cciss/c0d0p2: size is 4209030 sectors
>>> /dev/cciss/c0d0p2: size is 4209030 sectors
>>> /dev/cciss/c0d0p2: No label detected
>>> /dev/cciss/c0d0p3: size is 10490445 sectors
>>> /dev/cciss/c0d0p3: size is 10490445 sectors
>>> /dev/cciss/c0d0p3: No label detected
>>> /dev/cciss/c0d0p4: size is 271755540 sectors
>>> /dev/cciss/c0d0p4: size is 271755540 sectors
>>> /dev/cciss/c0d0p4: lvm2 label detected
>>> /dev/mapper/EMC_0113: size is 35358720 sectors
>>> /dev/mapper/EMC_0113: size is 35358720 sectors
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: size is 35358720 sectors
>>> /dev/mapper/EMC_0111: size is 35358720 sectors
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: size is 35358720 sectors
>>> /dev/mapper/EMC_010F: size is 35358720 sectors
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: size is 35358720 sectors
>>> /dev/mapper/EMC_010D: size is 35358720 sectors
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: size is 35358720 sectors
>>> /dev/mapper/EMC_010B: size is 35358720 sectors
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: size is 35358720 sectors
>>> /dev/mapper/EMC_0109: size is 35358720 sectors
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: size is 35358720 sectors
>>> /dev/mapper/EMC_0107: size is 35358720 sectors
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: size is 35358720 sectors
>>> /dev/mapper/EMC_0105: size is 35358720 sectors
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: size is 35358720 sectors
>>> /dev/mapper/EMC_0103: size is 35358720 sectors
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: size is 35358720 sectors
>>> /dev/mapper/EMC_0101: size is 35358720 sectors
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: size is 35358720 sectors
>>> /dev/mapper/EMC_00FF: size is 35358720 sectors
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: size is 35358720 sectors
>>> /dev/mapper/EMC_00FD: size is 35358720 sectors
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0012: size is 9600 sectors
>>> /dev/mapper/EMC_0012: size is 9600 sectors
>>> /dev/mapper/EMC_0012: No label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/cciss/c0d0p4: lvm2 label detected
>>> /dev/cciss/c0d0p4: lvm2 label detected
>>> PV /dev/mapper/EMC_0113 is in exported VG vg_mds [16.84 GB / 0 free]
>>> PV /dev/mapper/EMC_0111 is in exported VG vg_mds [16.84 GB / 0 free]
>>> PV /dev/mapper/EMC_010F is in exported VG vg_mds [16.84 GB / 0 free]
>>> PV /dev/mapper/EMC_010D is in exported VG vg_mds [16.84 GB / 0 free]
>>> PV /dev/mapper/EMC_010B is in exported VG vg_mds [16.84 GB / 0 free]
>>> PV /dev/mapper/EMC_0109 is in exported VG vg_mds [16.84 GB / 0 free]
>>> PV /dev/mapper/EMC_0107 is in exported VG vg_mds [16.84 GB / 0 free]
>>> PV /dev/mapper/EMC_0105 is in exported VG vg_mds [16.84 GB / 0 free]
>>> PV /dev/mapper/EMC_0103 is in exported VG vg_mds [16.84 GB / 0 free]
>>> PV /dev/mapper/EMC_0101 is in exported VG vg_mds [16.84 GB / 0 free]
>>> PV /dev/mapper/EMC_00FF is in exported VG vg_mds [16.84 GB / 0 free]
>>> PV /dev/mapper/EMC_00FD is in exported VG vg_mds [16.84 GB / 0 free]
>>> PV /dev/cciss/c0d0p4 VG vg00 lvm2 [129.58 GB / 44.00 MB free]
>>> Total: 13 [331.71 GB] / in use: 13 [331.71 GB] / in no VG: 0 [0 ]
>>>
>>> *VGSCAN
>>> *# vgscan -vv
>>> Setting global/locking_type to 1
>>> File-based locking selected.
>>> Setting global/locking_dir to /var/lock/lvm
>>> Wiping cache of LVM-capable devices
>>> Wiping internal VG cache
>>> Reading all physical volumes. This may take a while...
>>> Finding all volume groups
>>> /dev/cciss/c0d0: size is 286677120 sectors
>>> /dev/cciss/c0d0p1: size is 208782 sectors
>>> /dev/cciss/c0d0p1: size is 208782 sectors
>>> /dev/cciss/c0d0p1: No label detected
>>> /dev/cciss/c0d0p2: size is 4209030 sectors
>>> /dev/cciss/c0d0p2: size is 4209030 sectors
>>> /dev/cciss/c0d0p2: No label detected
>>> /dev/cciss/c0d0p3: size is 10490445 sectors
>>> /dev/cciss/c0d0p3: size is 10490445 sectors
>>> /dev/cciss/c0d0p3: No label detected
>>> /dev/cciss/c0d0p4: size is 271755540 sectors
>>> /dev/cciss/c0d0p4: size is 271755540 sectors
>>> /dev/cciss/c0d0p4: lvm2 label detected
>>> /dev/mapper/EMC_0113: size is 35358720 sectors
>>> /dev/mapper/EMC_0113: size is 35358720 sectors
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: size is 35358720 sectors
>>> /dev/mapper/EMC_0111: size is 35358720 sectors
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: size is 35358720 sectors
>>> /dev/mapper/EMC_010F: size is 35358720 sectors
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: size is 35358720 sectors
>>> /dev/mapper/EMC_010D: size is 35358720 sectors
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: size is 35358720 sectors
>>> /dev/mapper/EMC_010B: size is 35358720 sectors
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: size is 35358720 sectors
>>> /dev/mapper/EMC_0109: size is 35358720 sectors
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: size is 35358720 sectors
>>> /dev/mapper/EMC_0107: size is 35358720 sectors
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: size is 35358720 sectors
>>> /dev/mapper/EMC_0105: size is 35358720 sectors
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: size is 35358720 sectors
>>> /dev/mapper/EMC_0103: size is 35358720 sectors
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: size is 35358720 sectors
>>> /dev/mapper/EMC_0101: size is 35358720 sectors
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: size is 35358720 sectors
>>> /dev/mapper/EMC_00FF: size is 35358720 sectors
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: size is 35358720 sectors
>>> /dev/mapper/EMC_00FD: size is 35358720 sectors
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0012: size is 9600 sectors
>>> /dev/mapper/EMC_0012: size is 9600 sectors
>>> /dev/mapper/EMC_0012: No label detected
>>> Locking /var/lock/lvm/V_vg_mds RB
>>> Finding volume group "vg_mds"
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> /dev/mapper/EMC_0113: lvm2 label detected
>>> /dev/mapper/EMC_0111: lvm2 label detected
>>> /dev/mapper/EMC_010F: lvm2 label detected
>>> /dev/mapper/EMC_010D: lvm2 label detected
>>> /dev/mapper/EMC_010B: lvm2 label detected
>>> /dev/mapper/EMC_0109: lvm2 label detected
>>> /dev/mapper/EMC_0107: lvm2 label detected
>>> /dev/mapper/EMC_0105: lvm2 label detected
>>> /dev/mapper/EMC_0103: lvm2 label detected
>>> /dev/mapper/EMC_0101: lvm2 label detected
>>> /dev/mapper/EMC_00FF: lvm2 label detected
>>> /dev/mapper/EMC_00FD: lvm2 label detected
>>> Found exported volume group "vg_mds" using metadata type lvm2
>>> Unlocking /var/lock/lvm/V_vg_mds
>>> Locking /var/lock/lvm/V_vg00 RB
>>> Finding volume group "vg00"
>>> /dev/cciss/c0d0p4: lvm2 label detected
>>> /dev/cciss/c0d0p4: lvm2 label detected
>>> Found volume group "vg00" using metadata type lvm2
>>> Unlocking /var/lock/lvm/V_vg00
>>>
>>> brem belguebli wrote:
>>>
>>>
>>>
>>>> Hi,
>>>>
>>>> Never had no problem with it.
>>>>
>>>> The only problem I've hit was due to the binding file being, by
>>>> default, located in /var/lib/multipath, which is in my setup on a
>>>> separate LV than /, during boot time the devices were not correctly
>>>> created.
>>>>
>>>> Just had to switch the binding file to /etc and now no more problem.
>>>>
>>>> extract of my /etc/multipath.conf :
>>>>
>>>>
>>>> defaults {
>>>> ...
>>>> flush_on_last_del yes
>>>> user_friendly_names yes
>>>> bindings_file "/etc/multipath_bindings"
>>>> }
>>>>
>>>> 2010/1/4 Bryn M. Reeves <bmr at redhat.com>:
>>>>
>>>>
>>>>
>>>>
>>>>> On Wed, 2009-12-30 at 12:52 +0100, brem belguebli wrote:
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> see man 5 lvm.conf there is an option called preferred_names which is
>>>>>> well explained
>>>>>>
>>>>>> It'll instruct lvm to use the preferred_names you configured in the
>>>>>> lvm.conf file if they exist
>>>>>>
>>>>>> ie : preferred_names = "/dev/mpath/" will use /dev/mpath/XXX instead
>>>>>> of /dev/mapper/XXX
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>> It's best not to use the symlinks in /dev/mpath - they are not always
>>>>> reliable. Use the device nodes created in /dev/mapper instead.
>>>>>
>>>>> Regards,
>>>>> Bryn.
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> linux-lvm mailing list
>>>>> linux-lvm at redhat.com
>>>>> https://www.redhat.com/mailman/listinfo/linux-lvm
>>>>> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>> _______________________________________________
>>>> linux-lvm mailing list
>>>> linux-lvm at redhat.com
>>>> https://www.redhat.com/mailman/listinfo/linux-lvm
>>>> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>
>>
>
>
--
Simon Loewenthal/Tele2
GSM: +31 6 2000 5427
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