My CentOS 5.4 box has a single HBA card with 2 ports connected to my Storage. 2 Luns are assigned to my HBA card. Under /dev instead of seeing 4 devices I can see 12 devices from sdb to sdm. I am using qlogic driver that is bulitin to the OS. Has any one seen this kind of situation?
Paras
Greetings,
On Fri, Jan 8, 2010 at 10:08 AM, Paras pradhan pradhanparas@gmail.com wrote:
My CentOS 5.4 box has a single HBA card with 2 ports connected to my Storage. 2 Luns are assigned to my HBA card. Under /dev instead of seeing 4 devices I can see 12 devices from sdb to sdm. I am using qlogic driver that is bulitin to the OS. Has any one seen this kind of situation?
Paras
A case before multipathing is installed.
Install multipathing device driver from the server vendor's site.
One thing to remember: always prefer rpm as first and second choice.
Regards,
Rajagopal
Hi,
On Thu, Jan 7, 2010 at 11:06 PM, Rajagopal Swaminathan < raju.rajsand@gmail.com> wrote:
Greetings,
On Fri, Jan 8, 2010 at 10:08 AM, Paras pradhan pradhanparas@gmail.com wrote:
My CentOS 5.4 box has a single HBA card with 2 ports connected to my Storage. 2 Luns are assigned to my HBA card. Under /dev instead of seeing
4
devices I can see 12 devices from sdb to sdm. I am using qlogic driver
that
is bulitin to the OS. Has any one seen this kind of situation?
Paras
A case before multipathing is installed.
Install multipathing device driver from the server vendor's site.
Server is Dell R905 series , HBA is qlogic and OS is CentOS/Redhat 54. So you mean use the rpm package from red hat?
One thing to remember: always prefer rpm as first and second choice.
Regards,
Rajagopal _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Hi Rajagopal,
Do you mean to say this is typical and is resolved after we use device mapper multipathing?
Paras.
On Thu, Jan 7, 2010 at 11:06 PM, Rajagopal Swaminathan < raju.rajsand@gmail.com> wrote:
Greetings,
On Fri, Jan 8, 2010 at 10:08 AM, Paras pradhan pradhanparas@gmail.com wrote:
My CentOS 5.4 box has a single HBA card with 2 ports connected to my Storage. 2 Luns are assigned to my HBA card. Under /dev instead of seeing
4
devices I can see 12 devices from sdb to sdm. I am using qlogic driver
that
is bulitin to the OS. Has any one seen this kind of situation?
Paras
A case before multipathing is installed.
Install multipathing device driver from the server vendor's site.
One thing to remember: always prefer rpm as first and second choice.
Regards,
Rajagopal _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Greetings,
On Fri, Jan 8, 2010 at 11:01 AM, Paras pradhan pradhanparas@gmail.com wrote:
Hi Rajagopal,
Do you mean to say this is typical and is resolved after we use device mapper multipathing?
IIRC, in about 2008.11 I was tasked build a cluster with SAN. The san administrator created 3 LUNs and first time around, it showed 12 LUNs. I think it was RHEL4. Afer installation of the multipathing software from server vendor site, we got the 3 LUNs properly. But at that time I did sweat a little.
Of course assuming you have two qlogic, 2 san switches etc etc.
In short, most likely yes.
BTW I am not a storage administrator....
Regards,
Rajagopal
I did create the device mapper for multipathing but while testing failover is not working. So my concern is with the hba driver since I am seeing more than expected.
Thanks
Paras
On Thursday, January 7, 2010, Rajagopal Swaminathan raju.rajsand@gmail.com wrote:
Greetings,
On Fri, Jan 8, 2010 at 11:01 AM, Paras pradhan pradhanparas@gmail.com wrote:
Hi Rajagopal,
Do you mean to say this is typical and is resolved after we use device mapper multipathing?
IIRC, in about 2008.11 I was tasked build a cluster with SAN. The san administrator created 3 LUNs and first time around, it showed 12 LUNs. I think it was RHEL4. Afer installation of the multipathing software from server vendor site, we got the 3 LUNs properly. But at that time I did sweat a little.
Of course assuming you have two qlogic, 2 san switches etc etc.
In short, most likely yes.
BTW I am not a storage administrator....
Regards,
Rajagopal _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Greetings,
On Fri, Jan 8, 2010 at 11:31 AM, Paras pradhan pradhanparas@gmail.com wrote:
I did create the device mapper for multipathing but while testing failover is not working. So my concern is with the hba driver since I am seeing more than expected.
Check for the kernel modules for device mapper. I cant off hand tell you which one of those are. also re check the zoning config.
Regards
Rajagopal
On 1/8/10 6:38 AM, Paras pradhan wrote:
My CentOS 5.4 box has a single HBA card with 2 ports connected to my Storage. 2 Luns are assigned to my HBA card. Under /dev instead of seeing 4 devices I can see 12 devices from sdb to sdm. I am using qlogic driver that is bulitin to the OS. Has any one seen this kind of situation?
Sounds like zoning problem ..
-- Eero
On Thu, Jan 7, 2010 at 11:08 PM, Eero Volotinen eero.volotinen@iki.fiwrote:
On 1/8/10 6:38 AM, Paras pradhan wrote:
My CentOS 5.4 box has a single HBA card with 2 ports connected to my Storage. 2 Luns are assigned to my HBA card. Under /dev instead of seeing 4 devices I can see 12 devices from sdb to sdm. I am using qlogic driver that is bulitin to the OS. Has any one seen this kind of
situation?
Sounds like zoning problem ..
Storage is HDS and the LUN type created was of type netware. I don't know why this type but my storage administrator said its correct. This might be an issue?
Or if you can ellaborate how this is zoning problem it wud be great help.
Paras.
-- Eero _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On 1/8/10 7:21 AM, Paras pradhan wrote:
On Thu, Jan 7, 2010 at 11:08 PM, Eero Volotinen <eero.volotinen@iki.fi mailto:eero.volotinen@iki.fi> wrote:
On 1/8/10 6:38 AM, Paras pradhan wrote: > My CentOS 5.4 box has a single HBA card with 2 ports connected to my > Storage. 2 Luns are assigned to my HBA card. Under /dev instead of > seeing 4 devices I can see 12 devices from sdb to sdm. I am using qlogic > driver that is bulitin to the OS. Has any one seen this kind of situation? Sounds like zoning problem ..Storage is HDS and the LUN type created was of type netware. I don't know why this type but my storage administrator said its correct. This might be an issue?
Or if you can ellaborate how this is zoning problem it wud be great help.
Are you sure that you can see correct luns? check the size ?
-- Eero
Yes here is th o/p of fdisk -l. Two Luns are assigned. one of 323 G and another of 359 G as seen blow. sda is my local disk. So do you think incorrect zoning can lead to this?
Thanks Paras.
----------------------------------------------------- [root@prd1 ~]# fdisk -l
Disk /dev/sda: 146.1 GB, 146163105792 bytes 255 heads, 63 sectors/track, 17769 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sda1 * 1 33 265041 83 Linux /dev/sda2 34 4210 33551752+ 82 Linux swap / Solaris /dev/sda3 4211 6821 20972857+ 83 Linux /dev/sda4 6822 17769 87939810 5 Extended /dev/sda5 6822 17769 87939778+ 83 Linux
Disk /dev/sdb: 323.4 GB, 323459481600 bytes 255 heads, 63 sectors/track, 39325 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdb1 1 2 16033+ 83 Linux /dev/sdb2 3 39325 315861997+ 83 Linux
Disk /dev/sdc: 359.3 GB, 359399424000 bytes 255 heads, 63 sectors/track, 43694 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdc1 1 43694 350972023+ 83 Linux
Disk /dev/sdd: 323.4 GB, 323459481600 bytes 255 heads, 63 sectors/track, 39325 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdd1 1 2 16033+ 83 Linux /dev/sdd2 3 39325 315861997+ 83 Linux
Disk /dev/sde: 323.4 GB, 323459481600 bytes 255 heads, 63 sectors/track, 39325 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sde1 1 2 16033+ 83 Linux /dev/sde2 3 39325 315861997+ 83 Linux
Disk /dev/sdf: 359.3 GB, 359399424000 bytes 255 heads, 63 sectors/track, 43694 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdf1 1 43694 350972023+ 83 Linux
Disk /dev/sdg: 323.4 GB, 323459481600 bytes 255 heads, 63 sectors/track, 39325 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdg1 1 2 16033+ 83 Linux /dev/sdg2 3 39325 315861997+ 83 Linux
Disk /dev/sdh: 323.4 GB, 323459481600 bytes 255 heads, 63 sectors/track, 39325 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdh1 1 2 16033+ 83 Linux /dev/sdh2 3 39325 315861997+ 83 Linux
Disk /dev/sdi: 359.3 GB, 359399424000 bytes 255 heads, 63 sectors/track, 43694 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdi1 1 43694 350972023+ 83 Linux
Disk /dev/sdj: 323.4 GB, 323459481600 bytes 255 heads, 63 sectors/track, 39325 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdj1 1 2 16033+ 83 Linux /dev/sdj2 3 39325 315861997+ 83 Linux
Disk /dev/sdk: 323.4 GB, 323459481600 bytes 255 heads, 63 sectors/track, 39325 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdk1 1 2 16033+ 83 Linux /dev/sdk2 3 39325 315861997+ 83 Linux
Disk /dev/sdl: 359.3 GB, 359399424000 bytes 255 heads, 63 sectors/track, 43694 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdl1 1 43694 350972023+ 83 Linux
Disk /dev/sdm: 323.4 GB, 323459481600 bytes 255 heads, 63 sectors/track, 39325 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdm1 1 2 16033+ 83 Linux /dev/sdm2 3 39325 315861997+ 83 Linux
On Thu, Jan 7, 2010 at 11:26 PM, Eero Volotinen eero.volotinen@iki.fiwrote:
On 1/8/10 7:21 AM, Paras pradhan wrote:
On Thu, Jan 7, 2010 at 11:08 PM, Eero Volotinen <eero.volotinen@iki.fi mailto:eero.volotinen@iki.fi> wrote:
On 1/8/10 6:38 AM, Paras pradhan wrote: > My CentOS 5.4 box has a single HBA card with 2 ports connected tomy
> Storage. 2 Luns are assigned to my HBA card. Under /dev instead of > seeing 4 devices I can see 12 devices from sdb to sdm. I am using qlogic > driver that is bulitin to the OS. Has any one seen this kind of situation? Sounds like zoning problem ..Storage is HDS and the LUN type created was of type netware. I don't know why this type but my storage administrator said its correct. This might be an issue?
Or if you can ellaborate how this is zoning problem it wud be great help.
Are you sure that you can see correct luns? check the size ?
-- Eero _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
-
Eero Volotinen -
Paras pradhan -
Rajagopal Swaminathan