hi guys,
In hope that some experts roam around I post this one question - how do
you multipath disks(all disks) that sit in one specific SAS enclosure?
Blacklist everything else.
And I'm hoping for something like "globing", so you do not want to go
through it on by single disk/wwin basis.
I have inherited a system set up with multipath, which is not something I
have seen before so I could use some advice
The system is a Dell R420 with 2 LSI SAS2008 HBAs, 4 internal disks, and a
MD3200 storage array attached via SAS cables. Oh and CentOS 6
lsblk shows the following:
NAME
Am 31.01.2017 um 22:51 schrieb Gianluca Cecchi:
Hello,
suppose I want to use a special configuration for my IBM/1814 storage array
luns, then I put something like this in multipath.conf
devices {
device {
vendor "IBM"
product "^1814"
produc
Hello,
suppose I want to use a special configuration for my IBM/1814 storage array
luns, then I put something like this in multipath.conf
devices {
device {
vendor "IBM"
product "^1814"
product_blacklist "Universal Xport"
path
>3) flush multipaths
>4) stop iscsi
I guess that's the point, it seems the init script does not flush them out so
the module and any dependent dm mods stay active.
jlc
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Am 21.08.2011 21:49, schrieb Joseph L. Casale:
> I have several CentOS 6 boxes that mount iscsi based luns and use mpath.
> They all had problems shutting down as a result of unused maps not getting
> flushed as the system halted.
>
> After examining the init scripts, netfs, iscsi and multipathd a
I have several CentOS 6 boxes that mount iscsi based luns and use mpath.
They all had problems shutting down as a result of unused maps not getting
flushed as the system halted.
After examining the init scripts, netfs, iscsi and multipathd all had the
correct
order but mpath failed to flush these
Reboot in to the latest kernel fixed this issue.
Paras.
On Fri, Sep 17, 2010 at 1:19 PM, Paras pradhan wrote:
> Hi,
> My storage admin just assigned a Lun (fibre) to my server. Then re scanned
> using
>
> echo "1" > /sys/class/fc_host/host5/issue_lip
>
> echo "1" > /sys/class/fc_host/host6/issu
Hi,
My storage admin just assigned a Lun (fibre) to my server. Then re scanned using
echo "1" > /sys/class/fc_host/host5/issue_lip
echo "1" > /sys/class/fc_host/host6/issue_lip
I can see the scsi device using dmesg
But mpath device are not created for this LUN
Pleas see below. The last 4 shou
On Mar 20, 2010, at 4:52 PM, Drew wrote:
>>> Depends on the target and the setup, ideally if you have 4 NICs you
>>> should be using at least two different VLANs, and since you have 4
>>> NICs (I assume for iSCSI only) you should use jumbo frames.
>>
>> Jumbo frames should only be used if your CP
>> Depends on the target and the setup, ideally if you have 4 NICs you
>> should be using at least two different VLANs, and since you have 4
>> NICs (I assume for iSCSI only) you should use jumbo frames.
>
> Jumbo frames should only be used if your CPU can't keep up with the
> load of 4 NICs otherw
On Mar 19, 2010, at 11:12 AM, "nate" wrote:
> Joseph L. Casale wrote:
>> Just started messing with multipath against an iSCSI target with 4
>> nics.
>> What should one expect as behavior when paths start failing? My lab
>> setup
>> was copying some data on a mounted block device when I droppe
Joseph L. Casale wrote:
> Just started messing with multipath against an iSCSI target with 4 nics.
> What should one expect as behavior when paths start failing? My lab setup
> was copying some data on a mounted block device when I dropped 3 of 4 paths
> and the responsiveness of the server complet
Just started messing with multipath against an iSCSI target with 4 nics.
What should one expect as behavior when paths start failing? My lab setup
was copying some data on a mounted block device when I dropped 3 of 4 paths
and the responsiveness of the server completely tanked for several minutes.
Paras pradhan wrote:
> Can anybody tell me if my multipath o/p is fine?
Hitachi support should be able to
> I have a active/active setup and when I unplug the FC SAN cable on one of
> the ports of my HBA my host is being un responsive and need to reboot it.
Sounds like it is mis configured, doin
Can anybody tell me if my multipath o/p is fine?
I have a active/active setup and when I unplug the FC SAN cable on one of
the ports of my HBA my host is being un responsive and need to reboot it.
When I do
multipath -ll
I can see:
[r...@cvprd2 etc]# multipath -ll
mpath2 (360060e8004770d00
Upgrding the kernel to 2.6.18-164.10.1.el5xen brought back /dev/dm-* and now
multipath -ll has the ouput.
I am curious about what has caused the lost of /dev/dm* in my previous
kernel.
Any ideas?
Paras.
On Mon, Jan 11, 2010 at 8:09 PM, Paras pradhan wrote:
> Yes every thing's loaded.
>
> Here
Yes every thing's loaded.
Here is the output:
[r...@cvprd1 ~]# lsmod | grep dm
dm_round_robin 36801 0
rdma_cm68565 1 ib_iser
ib_cm 73449 1 rdma_cm
iw_cm 43465 1 rdma_cm
ib_sa 75209 2 rdma_cm,ib_cm
ib_core
Paras pradhan wrote:
> Hi.
>
> Somehow I do not see any out put using multipath -l or multipath -ll . But I
> can see using dry run ie multipath -d.
>
> Also I do not see /dev/dm-*
>
> It was there before. How do I re claim it.
Are the modules loaded?
[r...@dc1-mysql001a:~]# lsmod | grep dm
dm_ze
Hi.
Somehow I do not see any out put using multipath -l or multipath -ll . But I
can see using dry run ie multipath -d.
Also I do not see /dev/dm-*
It was there before. How do I re claim it.
Thanks!
Paras.
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ht
about why the defaults are being used.
cheers
Alan McCulloch
-Original Message-
From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On Behalf Of
nate
Sent: Thursday, 17 September 2009 1:08 p.m.
To: centos@centos.org
Subject: Re: [CentOS] multipath using defaults rather
McCulloch, Alan wrote:
> hi all
>
> We have a rh linux server connected to two HP SAN controllers, one an HSV200
> (on the way out),
> the other an HSV400 (on the way in). (Via a Qlogic HBA).
>
> /etc/multipath.conf contains this :
>
> device
> {
> vendor "(COMPAQ|HP)"
> pr
hi all
We have a rh linux server connected to two HP SAN controllers, one an HSV200
(on the way out),
the other an HSV400 (on the way in). (Via a Qlogic HBA).
/etc/multipath.conf contains this :
device
{
vendor "(COMPAQ|HP)"
product "HSV1[01]1|HSV2[01]0|HSV300|H
I'm told that we cannot do Multipath I/O on our iSCSI SAN on RHEL
with 2 network cards. I could use 1 network card, but need an HBA.
Is this true? Do I need an HBA, or can I do Multipath using 2 NICs?
We're running RHEL 4 and CentOS 4 and 5 servers on this network.
I have been reading through th
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