Dell PowerEdge + Dell EMC SAN with Debian (Etch)

[Christian Placzek]

Hi,

does anybody here do have experience with this configuration?

I've got the following error when I try to mount a ntfs partition 
located on the SAN:

# mount -t ntfs /dev/mapper/LUN310p1 /san_roche/
mount: /dev/mapper/LUN310p1 already mounted or /san_roche/ busy

# dmsetup info
Name:              LUN310
State:             ACTIVE
Tables present:    LIVE
Open count:        1
Event number:      1
Major, minor:      254, 1
Number of targets: 1
UUID: mpath-360060160812011005c9643c784bedb11

Name:              LUN310p1
State:             ACTIVE
Tables present:    LIVE
Open count:        1
Event number:      0
Major, minor:      254, 2
Number of targets: 1
UUID: part1-mpath-360060160812011005c9643c784bedb11

Name:              LUN310p1p2
State:             ACTIVE
Tables present:    LIVE
Open count:        0
Event number:      0
Major, minor:      254, 3
Number of targets: 1
UUID: part2-part1-mpath-360060160812011005c9643c784bedb11

Name:              M_LUN1
State:             ACTIVE
Tables present:    LIVE
Open count:        1
Event number:      1
Major, minor:      254, 0
Number of targets: 1
UUID: mpath-36006016081201100da29f6796f01dd11

# ls -l /dev/mapper/
total 0
crw-rw---- 1 root root  10, 63 2008-04-23 16:25 control
brw-rw---- 1 root disk 254,  1 2008-04-23 16:25 LUN310
brw-rw---- 1 root disk 254,  2 2008-04-23 16:25 LUN310p1
brw-rw---- 1 root disk 254,  3 2008-04-23 16:25 LUN310p1p2
brw-rw---- 1 root disk 254,  0 2008-04-23 16:25 M_LUN1

The device M_LUN1 is working fine. Maby because it is an XFS and/or it 
does not have any partition.

As far as I know it is a problem of the commands executed by 
/etc/udev/multipath.rules.

Here the output from dmesg:
# dmesg |grep device-mapper
device-mapper: ioctl: 4.7.0-ioctl (2006-06-24) initialised: 
dm-devel at redhat.com
device-mapper: multipath: version 1.0.4 loaded
device-mapper: multipath emc: version 0.0.3 loaded
device-mapper: multipath emc: long trespass command will be send
device-mapper: multipath emc: honor reservation bit will not be set 
(default)
device-mapper: multipath round-robin: version 1.0.0 loaded
device-mapper: multipath emc: long trespass command will be send
device-mapper: multipath emc: honor reservation bit will not be set 
(default)
device-mapper: multipath emc: emc_pg_init: sending switch-over command
device-mapper: table: device /dev/mapper/LUN310p1 too small for target
device-mapper: table: 254:4: linear: dm-linear: Device lookup failed
device-mapper: ioctl: error adding target to table
device-mapper: multipath emc: emc_pg_init: sending switch-over command


Could anybody give me a hint? I've searched for many hours in the 
internet but no one seems to have had this problem before.

Hardware Infos:

PE2970
QLA2432
EMC CX300

Software Infos:

Debian Etch

# uname -a
Linux prdsrv7153 2.6.18-6-amd64 #1 SMP Sun Feb 10 17:50:19 UTC 2008 
x86_64 GNU/Linux

multipath.conf:
blacklist {
        wwid    360019b90d43695000e10160e7a5a0c91
        wwid    350060160b022494650060160b0224946
        devnode "^(ram|raw|loop|fd|md|sr|scd|st)[0-9]*"
        devnode "^hd[a-z][[0-9]*]"
        devnode "^cciss!c[0-9]d[0-9]*[p[0-9]*]"
}

## sda:    360019b90d43695000e10160e7a5a0c91
## M_LUN1: 36006016081201100da29f6796f01dd11
## LUNZ:   350060160b022494650060160b0224946
## LUN310: 360060160812011005c9643c784bedb11

multipaths {
        multipath {
                wwid                    36006016081201100da29f6796f01dd11
                alias                   M_LUN1
        }
        multipath {
                wwid                    360060160812011005c9643c784bedb11
                alias                   LUN310
        }
}

}
devices {
        device {
                vendor                  "DGC"
                product                 "*"
                product                 "^[^LUN_Z]"
                path_grouping_policy    group_by_priority
                getuid_callout          "/sbin/scsi_id -g -u -s /block/%n"
                prio_callout            "/sbin/mpath_prio_emc /dev/%n"
                hardware_handler        "1 emc"
                features                "0"
                no_path_retry           300
                path_checker            emc_clariion
                failback                immediate
        }
}



# multipath -ll
sda: checker msg is "readsector0 checker reports path is down"
sdb: checker msg is "readsector0 checker reports path is down"
LUN310 (360060160812011005c9643c784bedb11) dm-1 DGC,RAID 5
[size=800G][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=1][active]
 \_ 1:0:1:1 sdf 8:80  [active][ready]
\_ round-robin 0 [prio=0][enabled]
 \_ 1:0:0:1 sdd 8:48  [active][ready]
M_LUN1 (36006016081201100da29f6796f01dd11) dm-0 DGC,RAID 5
[size=574G][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=1][active]
 \_ 1:0:1:0 sde 8:64  [active][ready]
\_ round-robin 0 [prio=0][enabled]
 \_ 1:0:0:0 sdc 8:32  [active][ready]






Mit freundlichen Grüßen / with kind regards

Christian Placzek


ECLINSO AG
Messeplatz 10
CH-4058 Basel
Phone: +41 (0) 61 666 64 02
Mobil: +41 (0) 79 590 25 22
Fax:   +41 (0) 61 666 64 14



Philipp Sacha wrote:
> Hi all,
>
> I want to build a SAN infrastructure and talked to Dell about a solution
> with PE1955 and DELL EMC components.
>
> Our preferred Linux distribution is Debian Etch. So i am interessted
> whether someone has successfully build such a configuration and in
> exchanging expierences.
>
> I am even interessted whether someone has bought DELL PE and Dell EMC
> components in conjunction with Debian, because my Dell representatives
> refused to sell the components when we will use Debian. They told me the
> only chance to buy Dell/EMC with Linux is to choose a distribution like
> Redhat or SUSE.
>
>
> Regards,
>
> Philipp
>
>
>
>