search for: mpath0

Hi list! I have a server with dual port Qlogic iSCSI HBA. I set up the same LUN for both ports, and boot the CentOS installer with "linux mpath". Installer detects multipathing fine, and creates mpath0 device for root disk. Installation goes fine, and the system boots up and works fine after the install from the multipath root device. After install the setup is like this: LUN 0 on port 1: /dev/sda LUN 0 on port 2: /dev/sdb and those form mpath0 device, which works OK. But then comes the probl...

...5 #path_grouping_policy failover path_grouping_policy multibus rr_min_io 1 failback immediate #failback manual no_path_retry fail #no_path_retry queue } Now I have the mpath device configured correctly (IMHO): # multipath -ll mpath0 (gnbd) dm-2 GNBD,GNBD [size=20G][features=0][hwhandler=0] \_ round-robin 0 [prio=2][enabled] \_ #:#:#:# gnbd0 252:0 [active][ready] \_ #:#:#:# gnbd1 252:1 [active][ready] # # dmsetup ls mpath0 (253, 2) VolGroup00-LogVol01 (253, 1) VolGroup00-LogVol00 (253, 0) # Now I mkfs.ext3 ov...

...the technology I am trying to find out exactly what can and can not be manipulated, filesystem wise, without requiring a reboot. I am using the inbuilt software ISCSI initiator and multipathing in CentOS 5.1. My steps so far. Create 10GB volume on SAN # iscsiadm -m session -R # fdisk /dev/mapper/mpath0 # kpartx -a /dev/mapper/mpath0 # mke2fs -j /dev/mapper/mpath0p1 # mount /dev/mapper/mpath0p1 /test-mount <--works fine to here--> Now I want to extend the volume on the SAN to 15GB run fdisk and use resize2fs to extend the filesystem, is this possible without a reboot? Currently, I don't...

...zled. I looked through the mailing list archive and some other sources but doesn't seem like anything anyone encountered. I have two systems with attached HP SAN. I'm using SLES 10.1 with multipath-tools. When trying to mount OCFS2 device I get this: SERVER:/ # mount.ocfs2 /dev/mapper/mpath0 /mnt/temp/ mount.ocfs2: Invalid argument while mounting /dev/mapper/mpath0 on /mnt/temp/. Check 'dmesg' for more information on this error. So when I check dmesg I get: (8854,0):ocfs2_initialize_super:1418 ERROR: couldn't mount because of unsupported optional features (10). (8854,0):o...

...s. # You can put your own initialization stuff in here if you don't # want to do the full Sys V style init stuff. touch /var/lock/subsys/local modprobe hangcheck-timer hangcheck_tick=1 hangcheck_margin=10 hangcheck_reboot=1 mount -t ocfs2 -o datavolume,nointr,_netdev,noatime /dev/mapper/mpath0 /u02 mount -t ocfs2 -o datavolume,nointr,_netdev /dev/mapper/mpath1 /u03 Thanks! -Reid Reid McKinley ******************************************************************************************** This message, including any attachments, contains confidential information intended f...

Hello, I have IBM Storwize V3700 storage, connected to 2 IBM x3550 M4 servers via fiber channel. The servers are with QLogic ISP2532-based 8Gb Fibre Channel to PCI Express HBA cards and run Centos 5.10 When I export a volume to the servers, each of them sees the volume twice, i.e /dev/sdb and /dev/sdc, with the same size. Previously I have installed many systems with IBM DS3500 series of

Hello, we have a pair of IBM P570 servers running RHEL5.2 kernel 2.6.18-92.el5.ppc64 We have Oracle RAC on ocfs2 storage ocfs2 is 1.4.7-1 for the above kernel (downloaded from oracle oss site) Recently both servers have been crashing with the following error: Assertion failure in journal_dirty_metadata() at fs/jbd/transaction.c:1130: "handle->h_buffer_credits > 0" kernel BUG in

...n" sdu: checker msg is "readsector0 checker reports path is down" sdv: checker msg is "readsector0 checker reports path is down" sdx: checker msg is "readsector0 checker reports path is down" sdz: checker msg is "readsector0 checker reports path is down" mpath0 (3600144f0fdf58b5c00004bc738070001) dm-0 SUN,Sun Storage 7310 [size=50G][features=0][hwhandler=0][rw] \_ round-robin 0 [prio=1][active] \_ 0:0:1:0 sda 8:0 [active][ready] \_ round-robin 0 [prio=1][enabled] \_ 1:0:0:0 sde 8:64 [active][ready] \_ round-robin 0 [prio=1][enabled] \_ 0:0:2:0...

...cs/5/html/5.1/Installation_Guide/s1-kickstart2-options.html -- multipath (optional) multipath --name= --device= --rule= -- I have a multipath.conf which works fine when I install to local disk, I'm not sure what I should put in the options above, perhaps something like multipath --name=mpath0 --device=sda --device=sdb --rule= ??? Done tons of searches and can't find anything. Any idea what "rule" would map to in multipath.conf ? I've even installed the anaconda package and grepped through the code and can't find anything useful. thanks nate

...ss successfully now. Unfortunately one issue remains: the SUN 7310 has two storage heads, H1 and H2, which are in a active/passive configuration. If I define a LUN on H1, everything works great. I edit multipath.conf, re-create the initrd and I find 8 paths with active/ready and active/ghost: mpath0 (3600...0001) dm-0 SUN,Sun Storage 7310 [size=50G][features=1 queue_if_no_path][hwhandler=0][rw] \_ round-robin 0 [prio=200][active] \_ 0:0:0:0 sda 8:0 [active][ready] \_ 0:0:1:0 sdd 8:48 [active][ready] \_ 1:0:0:0 sdg 8:96 [active][ready] \_ 1:0:1:0 sdj 8:144 [active][ready] \_ round-robin...

...can I get the mapper device permissions set on reboot? When I attempted to try this... # cat /etc/udev/permissions.d/50-udev.permissions | grep mapper mapper/mpath*:oracle:dba:0660 But it did not seem to work... # ls -l /dev/mapper/mpath* brw-rw---- 1 root disk 253, 2 Feb 26 20:56 /dev/mapper/mpath0 brw-rw---- 1 root disk 253, 5 Feb 26 20:56 /dev/mapper/mpath0p1 brw-rw---- 1 root disk 253, 3 Feb 26 20:56 /dev/mapper/mpath1 brw-rw---- 1 root disk 253, 4 Feb 26 20:56 /dev/mapper/mpath1p1 Am I doing something wrong? Is there another way to do this? Thanks, Scott

...-7 SUN ,LCSM100_F [size=100G][features=1 queue_if_no_path][hwhandler=1 rdac] \_ round-robin 0 [prio=3][active] \_ 7:0:0:0 sdb 8:16 [active][ready] \_ round-robin 0 [prio=0][enabled] \_ 8:0:0:0 sde 8:64 [active][ghost] * Creation of the FS: # mkfs.ocfs2 -T mail /dev/mapper/mpath0 * Mount parameters: # mount | grep verejna /dev/mapper/3600a0b800067df83000003ba4ba0f5ef on /data/verejna type ocfs2 (rw,_netdev,heartbeat=local) # mounted.ocfs2 -d Device FS UUID Label /dev/sdb ocfs2 91ae6ead-eee5-42fe-957c-9392e02b5d90 /dev/dm-7...

...After creating and presenting a new snapshot, multipath will now see the paths reappear, which also seems normal behavior: Oct 22 03:16:06 ausracdb03 multipathd: sdcj: tur checker reports path is up Oct 22 03:16:06 ausracdb03 multipathd: 69:112: reinstated Oct 22 03:16:06 ausracdb03 multipathd: mpath0: queue_if_no_path enabled Oct 22 03:16:06 ausracdb03 multipathd: mpath0: Recovered to normal mode Oct 22 03:16:06 ausracdb03 multipathd: mpath0: remaining active paths: 1 Oct 22 03:16:06 ausracdb03 multipathd: dm-27: add map (uevent) Oct 22 03:16:06 ausracdb03 multipathd: dm-27: devmap already regi...

Hi, I''m currently trying to install xapi on debian (unstable), following the following wiki page: http://wiki.xensource.com/xenwiki/XAPI_on_debian 1. Install squeeze 32-bits (it''s not specified on the wiki, but I guess it wont work with 64-bit as the xapi *.deb files are for 32). note: you must leave an unused 1mb partition somewhere when creating your