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Old 04-16-2013, 09:09 AM   #1
eng_galileo
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Registered: Oct 2009
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Remove a Lun From Redhat


I have a running cluster system. I need to remove one LUN "LUN09". I disconnected the LUN from EMC then I removed the LV then removed the VG "vginfra" then the PV.

I found that mpath still has a new LUN "19" without removing "LUN09".

I need to clean this


[root@gcds1 bin]# ./mpathconfig.pl -l
/dev/mapper/lun01 size=358G
/dev/mapper/lun02 size=66G
/dev/mapper/lun04 size=330G
/dev/mapper/lun05 size=750G
/dev/mapper/lun06 size=592G
/dev/mapper/lun07 size=90G
/dev/mapper/lun08 size=90G
/dev/mapper/lun09 size=3.6T
/dev/mapper/lun10 size=5.0T
/dev/mapper/lun11 size=170G
/dev/mapper/lun12 size=170G
/dev/mapper/lun13 size=500G
/dev/mapper/lun14 size=582G
/dev/mapper/lun15 size=500G
/dev/mapper/lun16 size=582G
/dev/mapper/lun17 size=65G
/dev/mapper/lun18 size=65G
/dev/mapper/lun19 size=3.6T
/dev/mapper/lun20 size=7.2T
[root@gcds1 bin]#

[root@gcds1 bin]# multipath -ll
sdac: checker msg is "emc_clariion_checker: Logical Unit is unbound or LUNZ"
sdi: checker msg is "emc_clariion_checker: Logical Unit is unbound or LUNZ"
lun18 (36006016016402600eeba9cf34b1fe111) dm-9 DGC,RAID 10
[size=65G][features=1 queue_if_no_path][hwhandler=1 emc][rw]
\_ round-robin 0 [prio=1][active]
\_ 3:0:0:17 sdaj 66:48 [active][ready]
\_ round-robin 0 [prio=0][enabled]
\_ 2:0:0:17 sdp 8:240 [active][ready]
.
.
.
lun09 (360060160164026008a01c5e1a226df11) dm-2 DGC,RAID 5
[size=3.6T][features=1 queue_if_no_path][hwhandler=1 emc][rw]
\_ round-robin 0 [prio=0][enabled]
\_ 2:0:0:9 sdi 8:128 [failed][faulty]
\_ round-robin 0 [prio=0][enabled]
\_ 3:0:0:9 sdac 65:192 [failed][faulty]
.
.
.
lun19 (350060160c460156b50060160c460156b) dm-30 DGC,RAID 5
[size=3.6T][features=1 queue_if_no_path][hwhandler=1 emc][rw]
\_ round-robin 0 [prio=0][enabled]
\_ 3:0:0:9 sdac 65:192 [failed][faulty]
\_ 2:0:0:9 sdi 8:128 [failed][faulty]
.


[root@gcds1 bin]# pvscan
/dev/mapper/lun09: read failed after 0 of 4096 at 3939125624832: Input/output error
/dev/mapper/lun09: read failed after 0 of 4096 at 3939125682176: Input/output error
/dev/mapper/lun09: read failed after 0 of 4096 at 0: Input/output error
/dev/mapper/lun09: read failed after 0 of 4096 at 4096: Input/output error
/dev/mapper/vginfra-lvol1: read failed after 0 of 4096 at 3939118284800: Input/output error
/dev/mapper/vginfra-lvol1: read failed after 0 of 4096 at 3939118342144: Input/output error
/dev/mapper/vginfra-lvol1: read failed after 0 of 4096 at 0: Input/output error
/dev/mapper/vginfra-lvol1: read failed after 0 of 4096 at 4096: Input/output error
/dev/mapper/lun19: read failed after 0 of 4096 at 3939125624832: Input/output error
/dev/mapper/lun19: read failed after 0 of 4096 at 3939125682176: Input/output error
/dev/mapper/lun19: read failed after 0 of 4096 at 0: Input/output error
/dev/mapper/lun19: read failed after 0 of 4096 at 4096: Input/output error
PV /dev/mapper/lun01 VG vgarc lvm2 [358.00 GB / 0 free]
PV /dev/mapper/lun05 VG vgarc lvm2 [750.00 GB / 0 free]
PV /dev/mapper/lun06 VG vgarc lvm2 [591.85 GB / 62.55 GB free]
PV /dev/mapper/lun20 VG vgbackup lvm2 [7.17 TB / 0 free]
PV /dev/mapper/lun10 VG vgbackup2 lvm2 [5.01 TB / 4.00 MB free]
PV /dev/mapper/lun04 VG vgdb lvm2 [330.00 GB / 0 free]
PV /dev/mapper/lun13 VG vgdb lvm2 [500.00 GB / 0 free]
PV /dev/mapper/lun14 VG vgdb lvm2 [581.85 GB / 0 free]
PV /dev/mapper/lun15 VG vgdb lvm2 [500.00 GB / 103.15 GB free]
PV /dev/mapper/lun16 VG vgdb lvm2 [581.85 GB / 0 free]
PV /dev/mapper/lun11 VG vgglobal lvm2 [170.00 GB / 0 free]
PV /dev/mapper/lun12 VG vgglobal lvm2 [170.00 GB / 0 free]
PV /dev/mapper/lun17 VG vgglobal lvm2 [65.00 GB / 32.00 MB free]
PV /dev/mapper/lun18 VG vgglobal lvm2 [65.00 GB / 32.00 MB free]
PV /dev/mapper/lun02 VG vgredo lvm2 [66.00 GB / 0 free]
PV /dev/mapper/lun07 VG vgredo lvm2 [90.00 GB / 0 free]
PV /dev/mapper/lun08 VG vgredo lvm2 [90.00 GB / 4.21 GB free]
Total: 17 [16.97 TB] / in use: 17 [16.97 TB] / in no VG: 0 [0 ]
[root@gcds1 bin]#
 
Old 04-16-2013, 09:13 AM   #2
chrism01
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Registered: Aug 2004
Location: Sydney
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I could be wrong, but I believe you should have started from the host end.
 
Old 04-16-2013, 09:21 AM   #3
eng_galileo
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Registered: Oct 2009
Posts: 3

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hi,
what do you mean to start from the host end
 
Old 04-16-2013, 08:59 PM   #4
chrism01
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Quote:
I disconnected the LUN from EMC then I removed the LV then removed the VG "vginfra" then the PV.
This sounds like you cutoff the disk from the SAN, then tried to adjust it on the host end.
I would expect you'd clean-up the disk at the host end ie LV, VG, PV, then disconnect it ie after you've removed everything the host had on there.
 
Old 04-17-2013, 09:31 AM   #5
eng_galileo
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OK, the disks are already disconnected & we can't connect it again. what is the recommended procedure to clean it?
 
  


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