Get the wwn of multipatch luns linux3/24/2023 Now just tie that to your storage system. If you want to know more information about the device you can get a manufactures label by using:Ī lot of this information is stored in /dev/disk in various directories: This will return the SCSI device WWID not to be confused with any other WWID’s. This will allow us to identify our mount points to storage LUN’s.įirst thing to identify is the SCSI WWID this is used by Linux Native Multipathing (MPIO) this is found by using the following command (for device sda): This article will focus on getting the Storage LUN WWID from the server. so the first device in command ls -ld /sys/block/sd/device corresponds to the first device scene in the command cat /proc/scsi/scsi command above. The numbers marked at the end represent host, channel, target and LUN respectively. There are multiple WWID’s involved in the process here are a few: How many WWID's do we needĪs you can see we need a lot of WWID’s to make fiber channel storage work. Now compare hostX info with target with previous command( /proc/scsi/scsi ) to obtain details which disk is mapped to which LUN ID. This article assumes you already have a working knowledge of WWID’s, WWN’s and fiber channel storage. Linux Multipath command is used to manage storage SAN ( storage area network) disks on OS side. So it’s no doubt that there are some weaknesses when it comes to storage with linux. Have 17 Fibre Channel LUNs newly made available to the server, but multipath -ll does not show paths to the expected new LUNs. In all my experience I have not yet met a storage administrator who went to formal storage training. After adding new SAN LUNs, multipath devices are not showing up in Device Mapper Multipath. Enterprise Linux the very term usually refers to some type of storage area network normally fiber channel.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |