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2
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1answer
374 views

How to configure multipath using Intel X520-SR2 10GB on Oracle Linux 6.2?

I've installed the Intel x520-sr2 Ethernet/Fibre card into a server that has Oracle Linux 6.2 Installed on it. When I boot the server I can go into a QLogic menu (screen has something for Intel on ...
1
vote
1answer
32 views

Multipath Drive Association

So i have an issue were the drive mappings for the servers will not line up even though the configs for them match exactly.. The main problem is the path for the drives keeps switching. foo# ...
1
vote
1answer
316 views

9211-8i HBA (IT mode) with Supermicro expander

I have managed to get things to a point that I see all my drives listed with "multipath -l". Now the question is how to add them to a ZFS zpool? All attempts at using dm* naming or /dev/mapper names ...
0
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1answer
261 views

multipathd not working after restarting

Multipathd is not working, OS: CentOS 6.5 x86_64 [root@localhost ~]# rpm -qa|grep multipath device-mapper-multipath-libs-0.4.9-87.el6.x86_64 device-mapper-multipath-0.4.9-87.el6.x86_64 I m ...
0
votes
1answer
208 views

Multipath configuration is ignoring drives after /dev/sdaa, /dev/sdab, etc

I have a bare metal server running on Softlayer. It has many Consistent Performance iSCSI storage devices attached in a multipath configuration. One of the devices, represented by /dev/sdaa1 and ...
0
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1answer
84 views

New lun doesnt work well

Actually we have a server with Oracle Linux 5.8 in which we present clones of production LUN and then we open a clone of the database for several querys. The problem begin when we execute this ...
2
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0answers
1k views

XenServer 6.5 iSCSI MPIO with point-to-point links (without a Switch)

I'm doing some experiment with iSCSI MPIO between FreeNAS 9.3 and two XenServer 6.5 hosts. I would like to use iSCSI MPIO to serve as VM storage. Pretty common environment, but without a switch to ...
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0answers
178 views

Linux multipath 1 lun not using all paths other luns OK

A new 50gb lun was added to the rhel5.8 linux server and we did a scan to detect and add. However multipath -ll shows that the 50gb lun is using only 1 path while the old existing luns are on 2 ...
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0answers
158 views

Windows Server 2012R2 Backup

We have deployed Windows Server 2012R2, which by using the Windows Server Backup was backup on the drives connected from SAN. SAN disks connected through multiple paths using Windows Multipath-IO. ...
1
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0answers
138 views

Does a dead LUN path cause an increase in I/O times on the remaining LUN path(s)?

We use an EMC SAN appliance. There are 2 'paths' from the cluster to the SAN. Today we experienced that one of the LUN paths was 'dead' (as reported in the windows event logs). Presumably the ...
1
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0answers
628 views

How to install Ubuntu Server on SAN Storage with Multipath?

I have HP ProLiant BL35p blades and I want to install Ubuntu Server 12.x on them in order to do virtualization with OpenStack. The storage is made of HP StorageWorks SAN, which is connected to the ...
1
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0answers
685 views

Newly Resized Luns not Showing correct LUN Size RHel 5.3

My linux servers are not showing their newly resized fibre Luns after being extended on the fly(online).the storage guys have successfully resized the LUNS from 1Tb to 2 Tb .We are running fibre SAN ...
0
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0answers
12 views

No w/s in iostat output even though wMB/s is high

I am trying to format a 2 TB SAN based block device (/dev/mapper/mpathb). Even though, mke2fs has been running since over one hour without completing, iostat -z -x -m 10 output in a separate terminal ...
0
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0answers
28 views

Loading initial ramdisk very slow

I have a SUSE Linux 12 system here where the boot step "Loading initial ramdisk ..." sporadically takes hours instead of seconds. This system is supposed to boot from SAN and multipath is in place. ...
0
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0answers
34 views

Setup udev rules for: Multipathed SAN disks for Oracle ASM disks

I have just been given a new assignment to put up an Oracle RAC instance on a physical server. The RAW SAN disks will be presented to the server and have multiple paths. We do NOT have ASMlib as it ...
0
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0answers
25 views

LVM File Systems created with multipathed ISCSI storage LUNs are automatically going to Read-Only mode

I am using my RHEL 5 server with SAN LUNs to take the backup of my domain mails of all the users. For the redundancy, I configured multipathing for those LUNs. For scalability, I used those ...
0
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0answers
72 views

Can mpclaim in windows show the failed path of a multipath drive?

I am having problems with several of my iscsi paths in windows. In linux, using the multpath -l command, I can get the paths that are failing as they are clearly listed.. Example: -+- ...
0
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0answers
27 views

RAC disk timeouts vs powerpath

what precautions one needs to take at OS disk timeout , powerpath(possible tunings) and oracle CRS level as well ...to make sure when there is a path failure oracle RAC would not start evicting nodes ...
0
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0answers
41 views

redhat multipath -ll doesn't return an output

I need to expand a ext3 FS. The The multipath devices are under lvm control. multipath -ll does not return any output. I feel someone before my time configured the multipathing on the fly without ...
0
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0answers
55 views

Backup strategy for LVM file sytem on NFS file server connected to SAN

I have setup a server (CentOS) on which I have connected to several LUNs from a SAN via iSCSI then multipath, resulting in multiple physical volumes I can use for LVM (dm1 ...). From the file server, ...
0
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0answers
179 views

How to install Debian wheezy on a multipathed Device

I wanted to know how to install the Debian on Multipathed Luns since i did not found any complete Instructions I like to share my way to do it. Press TAB to enter additional settings. Type at the ...
0
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0answers
73 views

IBM HS22 QLogic SAN

We are trying to install a linux (Centos 6.6, 7.0, Ubuntu 15.04) on an IBM blade HS22 without local disks. The disk is provided by a SAN using two QLogic HBA (we are using multipath). We tried to ...
0
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0answers
632 views

VMware ESXi RDM Shared Disk and Multipathing

I have set up a RAW mapped storage device which is shared between 3 VMs. In the guest OSs the disk shows up fine but when I try to set up multipathing I can only see one path. In the virtual machine ...
0
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0answers
141 views

TCP Multipath using several SOCKS Proxys as uplink

I would like to set up a server, that uses several SOCKS Proxys as uplink to the internet. All Multipath setups I found were about using "normal" uplink like LAN, Cable or DSL, but none that uses ...