search for: multipathd

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2017 Dec 19
0
kernel: blk_cloned_rq_check_limits: over max segments limit., Device Mapper Multipath, iBFT, iSCSI COMSTAR
Hi, WARNING: Long post ahead I have an issue when starting multipathd. The kernel complains about "blk_cloned_rq_check_limits: over max segments limit". The server in question is configured for KVM hosting. It boots via iBFT to an iSCSI volume. Target is COMSTAR and underlying that is a ZFS volume (100GB). The server also has two infiniband cards providing...
2008 Mar 04
0
Device-mapper-multipath not working correctly with GNBD devices
...2) kernel: gnbd1: shutting down socket kernel: exiting GNBD_DO_IT ioctl kernel: gnbd1: Attempted send on closed socket gnbd_recvd[3357]: ERROR [gnbd_recvd.c:292] login refused by the server : No such device gnbd_recvd[3357]: reconnecting kernel: device-mapper: multipath: Failing path 252:1. multipathd: gnbd1: directio checker reports path is down multipathd: checker failed path 252:1 in map mpath0 multipathd: mpath0: remaining active paths: 1 gnbd_recvd[3357]: ERROR [gnbd_recvd.c:292] login refused by the server : No such device gnbd_recvd[3357]: reconnecting Now the copy process is fre...
2017 Jan 31
1
multipath show config different in CentOS 7?
...features "0" hardware_handler "1 rdac" prio "rdac" failback immediate rr_weight "uniform" no_path_retry "12" } } In CentOS 6.x when you restart multipathd or restart server, using multipathd -k multipathd> show config multipathd> exit in output you see your particular configuration instead than the default one for this particular device. In CentOS 7.3 instead I see it two times, the first one with the default built-in values (eg "no_path...
2008 Apr 05
0
BUG(?): multipathd confusion leads to kernel panic in Xen 3.2.1-rc2
Hi all. While playing with iSCSI Enterprise Target + multipathd on CentOS 5.1 (both the target and the initiator/multipath/xen box are Cent 5.1), I encountered a strange fault condition that leads to a kernel panic in a version of Xen 3.2.1-rc2 pulled from a couple of days ago. My lab consists of two Clovertown machines with dual GigE into separate swi...
2015 Feb 05
0
UC multipathd
...rything, the one package you miss is the one that stops the update. :-( >-----Original Message----- >From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On >Behalf Of John R Pierce >Sent: 04 February 2015 19:01 >To: centos at centos.org >Subject: Re: [CentOS] multipathd > >On 2/4/2015 6:02 AM, Rushton Martin wrote: >> OS is CentOS 5.3 (yes, I know - upgrade) > >at least patch CentOS 5. 5.3 is a snapshot from 6 years ago (2009), >there've been 6 years of updates to CentOS 5 since that point, both >security and bug fixes. `yum...
2015 Feb 05
0
UC multipathd
...rything, the one package you miss is the one that stops the update. :-( >-----Original Message----- >From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On >Behalf Of John R Pierce >Sent: 04 February 2015 19:01 >To: centos at centos.org >Subject: Re: [CentOS] multipathd > >On 2/4/2015 6:02 AM, Rushton Martin wrote: >> OS is CentOS 5.3 (yes, I know - upgrade) > >at least patch CentOS 5. 5.3 is a snapshot from 6 years ago (2009), >there've been 6 years of updates to CentOS 5 since that point, both >security and bug fixes. `yum...
2010 Sep 17
1
multipath troubleshoot
...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 should be active and I think this is the problem Kernel: 2.6.18-164.11.1.el5xen , EL 5.5 -- [root at cvprd3 lvm]# multipathd -k multipathd> show paths hcil dev dev_t pri dm_st chk_st next_check 5:0:0:0 sdb 8:16 1 [active][ready] XXX....... 7/20 5:0:0:1 sdc 8:32 1 [active][ready] XXX....... 7/20 5:0:0:16384 sdd 8:48 1 [active][ready] XXX....... 7/20 5:0:0:16385 sde 8:64...
2015 Feb 05
0
UC multipathd
>-----Original Message----- >From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On >Behalf Of Alexander Dalloz >Sent: 04 February 2015 22:44 >To: CentOS mailing list >Subject: Re: [CentOS] multipathd > >Am 04.02.2015 um 15:02 schrieb Rushton Martin: >> Our cluster was supplied with two IBM DS3400 RAID arrays connected >> with fibre channel. Both are old and one is failing so we bought an >> IBM >> V3700 to replace it. The V3700 complained that we were using the &...
2015 Feb 05
0
UC multipathd
>-----Original Message----- >From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On >Behalf Of Alexander Dalloz >Sent: 04 February 2015 22:44 >To: CentOS mailing list >Subject: Re: [CentOS] multipathd > >Am 04.02.2015 um 15:02 schrieb Rushton Martin: >> Our cluster was supplied with two IBM DS3400 RAID arrays connected >> with fibre channel. Both are old and one is failing so we bought an >> IBM >> V3700 to replace it. The V3700 complained that we were using the &...
2015 Feb 04
0
multipathd
Our cluster was supplied with two IBM DS3400 RAID arrays connected with fibre channel. Both are old and one is failing so we bought an IBM V3700 to replace it. The V3700 complained that we were using the IBM's RDAC driver (true) and we were advised to change to using Linux multipath. I've done that but the default configuration for the DS3400s is: device { vendor
2015 Feb 04
0
multipathd
On 2/4/2015 6:02 AM, Rushton Martin wrote: > OS is CentOS 5.3 (yes, I know - upgrade) at least patch CentOS 5. 5.3 is a snapshot from 6 years ago (2009), there've been 6 years of updates to CentOS 5 since that point, both security and bug fixes. `yum update` would bring you up to CentOS the .11 update plus security/bug fixes since. -- john r pierce
2015 Feb 04
0
multipathd
Am 04.02.2015 um 15:02 schrieb Rushton Martin: > Our cluster was supplied with two IBM DS3400 RAID arrays connected with > fibre channel. Both are old and one is failing so we bought an IBM > V3700 to replace it. The V3700 complained that we were using the IBM's > RDAC driver (true) and we were advised to change to using Linux > multipath. I've done that but the default
2015 Feb 04
0
multipathd
Our cluster was supplied with two IBM DS3400 RAID arrays connected with fibre channel. Both are old and one is failing so we bought an IBM V3700 to replace it. The V3700 complained that we were using the IBM's RDAC driver (true) and we were advised to change to using Linux multipath. I've done that but the default configuration for the DS3400s is: device { vendor
2008 Jun 19
3
lvm with iscsi devices on boot
Hi All, My CentOS 5.1 server is using iSCSI attached disks connecting to a dual controller storage array. I have also configured multipathd to manage the multiple paths. Everything works well, and on boot the dev nodes are automatically created in /dev/mapper. On these devices, I have created logical volumes using lvm2. My problem is that lvm does not recognize these iscsi/multipath volumes on boot up. I need to manually...
2010 May 27
2
Multipathing with Sun 7310
...elatively new Sun Storage 7310, where we connect CentOS 5.5 Servers (IBM LS21/LS41 Blades) via Brocade Switches, 4GBit FC. The Blades boot from SAN via qla2xxx, and have no harddisks at all. We want them to use multipathing from the very beginning, so /boot and / are already seen by multipathd. Problem is, that the Sun 7310 has two storage heads which run in active/passive mode. BUT the multipathd thinks, they are active/active and therefor shows half the available paths as faulty (multipath -ll below) While this probably gives me the redundancy that is desired, it is a relat...
2012 Jan 27
3
Cannot remove lvs associated with deleted vm guests
At the beginning of January I encountered a problem where several vm guests on a single host somehow managed to see the the virtual disks assigned to other guests on the same hosts. I was unable to resolve this situation and shutdown the affected guests after creating new guest instances and moving the services and data off the corrupted guests. I have since removed these guests via virt-manager
2012 Jan 27
3
Cannot remove lvs associated with deleted vm guests
At the beginning of January I encountered a problem where several vm guests on a single host somehow managed to see the the virtual disks assigned to other guests on the same hosts. I was unable to resolve this situation and shutdown the affected guests after creating new guest instances and moving the services and data off the corrupted guests. I have since removed these guests via virt-manager
2018 May 12
4
Centos 7 on Dell Latitude E6500
...3-01 from an USB flash drive on my old Dell Latitude E6500 laptop. boots up in text mode, switches text resolution, writes: Started Show Plymouth Boot Screen Reached Target Paths Reached Target Basic System. then hangs for some time, eventually starting dracut emergency shell. log says: multipathd: sdb: spurious uevent, path already in pathvec multipathd: sda: spurious uevent, path already in pathvec interesting: sdb is the internal 240GB kingston SSD drive (existing ntfs bitlocker partition recognized as sdb1) sda is the write protected USB stick, recognised as CDROM drive. 4GB rom inte...
2008 Sep 29
3
LVM related bug in the GPL PV drivers for Windows?
...wnmon.exe was not a win32 application or something like that. It said the same thing about copyconfig.exe, however, the same programs from version 0.9.10, were OK on XP too. The disk is a multipath LVM volume with four FibreChannel paths to a volume on a Sun Storagetek 6140 storage: carrier3:~ # multipathd -k multipathd> show topology ... ... ... vw-storman2 (3600a0b80004807f80000091248da00ef) dm-0 SUN ,CSM200_R [size=20G][features=1 queue_if_no_path][hwhandler=0] \_ round-robin 0 [prio=6][active] \_ 3:0:1:19 sdcc 69:0 [active][ready] \_ 1:0:0:19 sdag 66:0 [active][ready] \_ round-robin 0...
2008 Jun 25
6
dm-multipath use
Are folks in the Centos community succesfully using device-mapper-multipath? I am looking to deploy it for error handling on our iSCSI setup but there seems to be little traffic about this package on the Centos forums, as far as I can tell, and there seems to be a number of small issues based on my reading the dm-multipath developer lists and related resources. -geoff Geoff Galitz Blankenheim