You say this:

At the end of the day, the Responsibility is yours.

always so, they run redhat, SuSE or Gentoo.

You say this:

That I would not recommend you install EMC on an unsupported platform SW at all.

Linux kernel is an unsupported platform?

Gentoo Linux is a great distribution that enables a low-level hacking.

I've been down this path before, save yourself some time and just merge sys-fs/multipath-tools.

Many thanks cris.dance. Our company buy a vnx5300. We have seven gentoo Linux servers for connectivity (proxy, routing, mail, vpn, firewall, web, etc), some SLES11 (file server, virtualization), and many ubuntu LTS server (file server, virtualization). In a few weeks will tell in this post my experiences. byes!

iscsi and multipath on gentoo to access LUNs on vnx5300.

Run the following commands to install required packages in gentoo linux.

server1 # emerge sg3_utils multipath-tools open-iscsi
server1 # USE="device-mapper" emerge parted

Configure kernel:

Device Drivers --->

  SCSI device support --->
    <*> SCSI target support
    <*> SCSI disk support
   

• Probe all LUNs on each SCSI device
     
• • SCSI low-level drivers --->
         
  ISCSI Initiator over TCP / IP
      <*> SCSI Device Handlers --->
        <*> EMC CLARiiON Device Handler
  
   
  • Multiple devices driver support (RAID and LVM) --->
       
  <*> Multipath I / O support
      <*> Device mapper support
       
  • Device mapper debugging support
         
  <*> Multipath target
          I / O Path Selector based on the number of in-flight I / Os
          I / O Path Selector based on the service time
          (Select your device from the list))
      <*> EMC CX / AX multipath support
      <*> LSI / Engenio RDAC multipath support
      <*> HP MSA multipath support
  
  The NIC has a mtu of 9000, put in file '/etc/conf.d/net' this:
  
  mtu_eth1="9000"
  
  Use the same MTU setting if using bonding.
  
  iscsi gentoo:
  
  Configure the initiator name and alias in the file:
  
  /etc/iscsi/initiatorname.iscsi
  
  with values similar to:
  
  InitiatorName = iqn.2012-11.ar.com.fortix.proxy-1: initiator-proxy-1
  InitiatorAlias ​​= initiator-proxy-1
  

  replace with your own domain and date.

  
  Put in the file '/etc/iscsi/iscsid.conf' the following parameters:
  
  node.startup=automatic
  node.session.timeo.replacement_timeout=15
  
  Then:
  
  server1 # /etc/init.d/iscsid stop
  
  and
  
  server1 # /etc/init.d/iscsid start
  
  Discover the target:
  
  server1 # iscsiadm-m discovery-t st-p 192.168.1.250
  
  The LUN that provides the target can be seen with:
  
  server1 # iscsiadm-m node
  
  The results are automatically saved in directory '/etc/iscsi/nodes/*'
  
  To Login:
  
  server1 # iscsiadm-m node - targetname iqn.1992-04.com.emc: cx.ckm00122400615.b8 - portal 192.168.1.250:3260 - login
  
  and
  
  server1 #  /etc/init.d/iscsid restart
  
  MULTIPATH GENTOO:
  
  Put in fikle '/etc/multipath.conf' this:
  
  defaults {
          udev_dir / dev
          yes user_friendly_names
  }
  blacklist {
          devnode "^ (ram | raw | loop | fd | md | dm-| sr | scd | st) [0-9] *"
          devnode "^ hd [a-z] [[0-9] *]"
          devnode "^ cciss! c [0-9] d [0-9] * [p [0-9] *]"
          devnode sda
  }
  devices {
          device {
          vendor "DGC *"
          product "*"
          path_grouping_policy group_by_prio
          getuid_callout "/ lib / udev / scsi_id-g-u-d / dev /% n"
          prio_callout "/ sbin / mpath_prio_emc / dev /% n"
          path_checker emc_clariion
          path_selector "round-robin 0"
          features "1 queue_if_no_path"
          no_path_retry 300
          hardware_handler "1 emc"
          failback immediate
          }
  }
  multipaths {
          multipath {
                  wwid 3600601603c6031008ce731e7081de211
                  alias stdisk1
          }
  }
  
  discover wwid with command:
  
  server1 # multipath-l
  
  execute the following commands:
  
  server1 # /etc/init.d/multipath-tools stop
  
  server1 # /etc/init.d/multipath-tools start
  
  The following command clears the devices that are mapped to directory '/dev/mapper':
  
  server1 # multipath-F
  
  The following command creates devices that are mapped to directory '/dev/mapper':
  
  server1 # multipath-v2
  

  See values:
  
  server1 # multipath-ll
  
  Partitioning:
  
  server1 # fdisk / dev/mapper/stdisk1
  
  Make new partitions read without reboot:
  
  server1 # partprobe
  
  Format in ext3 filesystem:
  
  server1 # mkfs.ext3 / dev/mapper/stdisk1p1
  
  mount:
  
  server1 # mount  /dev/mapper/stdisk1p1  /mnt/storage
  
  Automatically mount at boot time
  
  put in file '/etc/fstab' a line similar to:
  
  /dev/mapper/stdisk1p1  /mnt/storage  ext3  defaults, auto, _netdev  0  2
  
  Then add to default run level:
  
  rc-update add default iscsid
  rc-update add multipathd default

  
  

  Message was edited by: kernel2000