I am running RHEL5 (2.6.18-53.el5) with EMCpowerpath.
[root@linux2 ~]# pvs
PV VG Fmt Attr PSize PFree
/dev/emcpowera emc_vg lvm2 a- 50.00G 0
/dev/emcpowerb emc_vg lvm2 a- 50.00G 39.99G
/dev/emcpowerc emc_vg lvm2 a- 50.00G 50.00G
/dev/emcpowerd emc_vg lvm2 a- 50.00G 50.00G
/dev/sda2 VolGroup00 lvm2 a- 67.62G 0
[root@linux2 ~]# lvs
LV VG Attr LSize Origin Snap% Move Log Copy%
LogVol00 VolGroup00 -wi-ao 62.75G
LogVol01 VolGroup00 -wi-ao 4.88G
emc_lv emc_vg -wi-a- 60.00G
[root@linux2 ~]# lvmdiskscan
/dev/ram0 [ 16.00 MB]
/dev/emcpowera [ 50.00 GB] LVM physical volume
/dev/root [ 62.75 GB]
/dev/ram [ 16.00 MB]
/dev/sda1 [ 101.94 MB]
/dev/VolGroup00/LogVol01 [ 4.88 GB]
/dev/ram2 [ 16.00 MB]
/dev/sda2 [ 67.65 GB] LVM physical volume
/dev/emc_vg/emc_lv [ 60.00 GB]
/dev/ram3 [ 16.00 MB]
/dev/ram4 [ 16.00 MB]
/dev/ram5 [ 16.00 MB]
/dev/ram6 [ 16.00 MB]
/dev/ram7 [ 16.00 MB]
/dev/ram8 [ 16.00 MB]
/dev/ram9 [ 16.00 MB]
/dev/ram10 [ 16.00 MB]
/dev/ram11 [ 16.00 MB]
/dev/ram12 [ 16.00 MB]
/dev/ram13 [ 16.00 MB]
/dev/ram14 [ 16.00 MB]
/dev/ram15 [ 16.00 MB]
/dev/emcpowerb [ 50.00 GB] LVM physical volume
/dev/emcpowerc [ 50.00 GB] LVM physical volume
/dev/emcpowerd [ 50.00 GB] LVM physical volume
3 disks
17 partitions
4 LVM physical volume whole disks
1 LVM physical volume
I can do mount /dev/emc_vg/emc_lv /test, But if I reboot the node and try
mounting the filesystem
it shows
[root@linux2 ~]# mount -a
mount: wrong fs type, bad option, bad superblock on /dev/emc_vg/emc_lv,
missing codepage or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
[root@linux2 ~]# dmesg | tail
Copyright (c) 1999-2007 LSI Logic Corporation
Fusion MPT misc device (ioctl) driver 3.04.04
mptctl: Registered with Fusion MPT base driver
mptctl: /dev/mptctl @ (major,minor=10,220)
eth0: no IPv6 routers present
Bridge firewalling registered
virbr0: no IPv6 routers present
ext3: No journal on filesystem on dm-2
ext3: No journal on filesystem on dm-2
ext3: No journal on filesystem on dm-2
Am not running native multipath,
[root@linux2 ~]# ps -ef | grep multipath
root 9082 8250 0 10:12 pts/1 00:00:00 grep multipath
[root@linux2 ~]# powermt display dev=all
Pseudo name=emcpowerd
CLARiiON ID=CK200073300475 [SG_Linux2]
Logical device ID=60060160DDD01D007C6B76E56A8CDC11 [LUN 0]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats
---
### HW Path I/O Paths Interf. Mode State Q-IOs
Errors
==============================================================================
1 qla2xxx sdd SP A2 active alive 0
0
1 qla2xxx sdh SP B2 active alive 0
0
2 qla2xxx sdl SP A3 active alive 0
0
2 qla2xxx sdp SP B3 active alive 0
0
Pseudo name=emcpowerb
CLARiiON ID=CK200073300475 [SG_Linux2]
Logical device ID=60060160DDD01D007D6B76E56A8CDC11 [LUN 1]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP B, current=SP B
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats
---
### HW Path I/O Paths Interf. Mode State Q-IOs
Errors
==============================================================================
1 qla2xxx sde SP A2 active alive 0
0
1 qla2xxx sdi SP B2 active alive 0
0
2 qla2xxx sdm SP A3 active alive 0
0
2 qla2xxx sdq SP B3 active alive 0
0
Pseudo name=emcpowera
CLARiiON ID=CK200073300475 [SG_Linux2]
Logical device ID=60060160DDD01D007E6B76E56A8CDC11 [LUN 2]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP A, current=SP A
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats
---
### HW Path I/O Paths Interf. Mode State Q-IOs
Errors
==============================================================================
1 qla2xxx sdb SP A2 active alive 0
0
1 qla2xxx sdf SP B2 active alive 0
0
2 qla2xxx sdj SP A3 active alive 0
0
2 qla2xxx sdn SP B3 active alive 0
0
Pseudo name=emcpowerc
CLARiiON ID=CK200073300475 [SG_Linux2]
Logical device ID=60060160DDD01D007F6B76E56A8CDC11 [LUN 3]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0
Owner: default=SP B, current=SP B
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats
---
### HW Path I/O Paths Interf. Mode State Q-IOs
Errors
==============================================================================
1 qla2xxx sdc SP A2 active alive 0
0
1 qla2xxx sdg SP B2 active alive 0
0
2 qla2xxx sdk SP A3 active alive 0
0
2 qla2xxx sdo SP B3 active alive 0
0
--
madunix
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