From mboxrd@z Thu Jan 1 00:00:00 1970 From: andysayshi Subject: multipath v0.4.5, nodes not appearing in /dev/ Date: Thu, 29 Sep 2005 17:02:46 -0400 Message-ID: <3f57d11c050929140232079e87@mail.gmail.com> Reply-To: andysayshi , device-mapper development Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0430998034==" Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: dm-devel@redhat.com List-Id: dm-devel.ids --===============0430998034== Content-Type: multipart/alternative; boundary="----=_Part_5453_16089458.1128027766197" ------=_Part_5453_16089458.1128027766197 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline multipath version: multipath v0.4.5 (16/06, 2005) kernel: Linux 2.6.9-22.ELsmp #1 SMP Mon Sep 19 18:32:14 EDT 2005 os: Red Hat Enterprise Linux ES release 4 (Nahant Update 2) Hello, Im new to multipath/devicemapper, so please excuse any misterminology or misunderstanding on my part : ) Basically, if i start up the multipathd service and run multipath to scan for devices, it finds (as it's supposed to) and emc entry (which i defined in /etc/multipath.conf). [root@cc1-86 dev]# multipath -v2 -l emc1 (36006016046861000625964d94cbbd911) [size=3D133 GB][features=3D"0"][hwhandler=3D"1 emc"] \_ round-robin 0 [active] \_ 1:0:0:0 sdb 8:16 [active] \_ 2:0:0:0 sdd 8:48 [active] \_ round-robin 0 [enabled] \_ 1:0:1:0 sdc 8:32 [active] \_ 2:0:1:0 sde 8:64 [active] [root@cc1-86 dev]# Now, originally we were running a previous version as a seperate admin mentioned here: https://www.redhat.com/archives/dm-devel/2005-August/msg00043.html , after lots of back and forth for this and other issues, our redhat support instructed us to use a updated version of multipath (ver listed above). bac= k on the previous version (v0.4.4), i would be able to find the multipath nod= e in /dev so that i could mount it. but now, i dont see anything in /dev, i d= o however see entries in /dev/mapper: [root@cc1-86 dev]# ls -l /dev|grep dm brw-r----- 1 root root 253, 0 Sep 29 13:11 dm-0 [root@cc1-86 dev]# ls -l /dev/mapper/ total 0 crw------- 1 root root 10, 63 Sep 29 09:08 control brw-rw---- 1 root disk 253, 0 Sep 29 13:11 emc1 [root@cc1-86 dev]# I've tried searching online for info, and i ran across this via http://christophe.varoqui.free.fr/wiki/wakka.php?wiki=3DFAQ : 5. I see my multipath nodes in /dev/mapper/ but not in /dev/ Verify you have a naming rule configured in udev *and* no bypass rule for dm-* devices= . The naming rule may use dmsetup or multipath-tools'-provided devmap_name. # Commented out : # KERNEL=3D"dm-[0-9]*", OPTIONS+=3D"ignore_device" KERNEL=3D"dm-[0-9]*", PROGRAM=3D"/sbin/devmap_name %M %m", NAME=3D"%k", SYMLINK=3D"%c" Partition mapping through kpartx won't work unless devices appear in /dev/. Can someone tell me if this is what I need to do as well? If so, where woul= d this file be located, so that I can update it? Thanks in advance, Andy. ------=_Part_5453_16089458.1128027766197 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline multipath version: multipath v0.4.5 (16/06, 2005)
kernel: Linux 2.6.9-22.ELsmp #1 SMP Mon Sep 19 18:32:14 EDT 2005
os: Red Hat Enterprise Linux ES release 4 (Nahant Update 2)

Hello,

Im new to multipath/devicemapper, so please excuse any misterminology or mi= sunderstanding on my part : )

Basically, if i start up the multipathd service and run multipath to scan for devices, it finds (as it's supposed to) and emc entry (which i defined in /etc/multipath.conf).

[root@cc1-86 dev]# multipath -v2 -l
emc1 (36006016046861000625964d94cbbd911)
[size=3D133 GB][features=3D"0"][hwhandler=3D"1 emc"] \_ round-robin 0 [active]
  \_ 1:0:0:0 sdb  8:16    [active]
  \_ 2:0:0:0 sdd  8:48    [active]
\_ round-robin 0 [enabled]
  \_ 1:0:1:0 sdc  8:32    [active]
  \_ 2:0:1:0 sde  8:64    [active]

[root@cc1-86 dev]#

Now, originally we were running a previous version as a seperate admin mentioned here: https://www.redhat.com/archives/dm-devel/2005-August/msg00043.html = , after lots of back and forth for this and other issues, our redhat support instructed us to use a updated version of multipath (ver listed above). back on the previous version (v0.4.4), i would be able to find the multipath node in /dev so that i could mount it. but now, i dont see anything in /dev, i do however see entries in /dev/mapper:

[root@cc1-86 dev]# ls -l /dev|grep dm
brw-r-----  1 root   root   253,   0 Sep= 29 13:11 dm-0
[root@cc1-86 dev]# ls -l /dev/mapper/
total 0
crw-------  1 root root  10, 63 Sep 29 09:08 control
brw-rw----  1 root disk 253,  0 Sep 29 13:11 emc1
[root@cc1-86 dev]#

I've tried searching online for info, and i ran across this via http://christo= phe.varoqui.free.fr/wiki/wakka.php?wiki=3DFAQ :

5. I see my multipath nodes in /dev/mapper/ but not in /dev/

Verify you have a naming rule configured in udev *and* no bypass rule for d= m-* devices.
The naming rule may use dmsetup or multipath-tools'-provided devmap_name.
# Commented out :
# KERNEL=3D"dm-[0-9]*", OPTIONS+=3D"ignore_device"
KERNEL=3D"dm-[0-9]*", PROGRAM=3D"/sbin/devmap_name %M %m&quo= t;, NAME=3D"%k", SYMLINK=3D"%c"

Partition mapping through kpartx won't work unless devices appear in /dev/.=

Can someone tell me if this is what I need to do as well? If so, where woul= d this file be located, so that I can update it?

Thanks in advance,

Andy.
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