============================ local-or-san-device-in-linux ============================ .. raw:: html .. raw:: html .. raw:: html .. raw:: html .. raw:: html .. raw:: html
.. | **Source:** https://foxhop.net/f3cb90db-2f95-11f1-91d9-e86a64d24d78/local-or-san-device-in-linux | **Snapshot:** 2026-10-16T05:55:55Z | **Generator:** Remarkbox ``d747782`` *This is a thread snapshot. The living document lives at the source URI above — it may have been edited, extended, or replied-to since.* .. raw:: html .. figure:: data:image/png;base64,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 :alt: Scan for living source Scan for living source .. raw:: html
How to determine if a device is Local or SAN in Linux ===================================================== I'm just going to list a bunch of safe commands you can run to probe the system to determine what you are working with. .. container:: lsscsi ------ lsscsi list scsi .. container:: :name: cb1 :: [root@server]# lsscsi [0:0:0:0] disk IBM-ESXS ST973452SS B623 - [0:0:1:0] disk IBM-ESXS ST973452SS B623 - [0:1:3:0] disk LSILOGIC Logical Volume 3000 /dev/sda [3:0:0:0] disk 3PARdata VV 0000 /dev/sdb [5:0:0:0] disk 3PARdata VV 0000 /dev/sdc [root@server]# lsscsi -H [0] mptsas [1] ata_piix [2] ata_piix [3] [4] [5] [6] [root@server]# lsscsi -g [0:0:0:0] disk IBM-ESXS ST973452SS B623 - /dev/sg0 [0:0:1:0] disk IBM-ESXS ST973452SS B623 - /dev/sg1 [0:1:3:0] disk LSILOGIC Logical Volume 3000 /dev/sda /dev/sg2 [3:0:0:0] disk 3PARdata VV 0000 /dev/sdb /dev/sg3 [5:0:0:0] disk 3PARdata VV 0000 /dev/sdc /dev/sg4 ls /dev/disk ------------ .. container:: :name: cb2 :: [root@server]# ls -hal /dev/disk/by-path/ total 0 drwxr-xr-x 2 root root 180 Jan 11 2012 . drwxr-xr-x 6 root root 120 Jan 11 2012 .. lrwxrwxrwx 1 root root 9 Jan 11 2012 ide-0:0 -> ../../hda lrwxrwxrwx 1 root root 9 Jan 11 2012 pci-0000:04:00.0-scsi-0:1:3:0 -> ../../sda lrwxrwxrwx 1 root root 10 Jan 11 2012 pci-0000:04:00.0-scsi-0:1:3:0-part1 -> ../../sda1 lrwxrwxrwx 1 root root 10 Jan 11 2012 pci-0000:04:00.0-scsi-0:1:3:0-part2 -> ../../sda2 lrwxrwxrwx 1 root root 10 Jan 11 2012 pci-0000:04:00.0-scsi-0:1:3:0-part3 -> ../../sda3 lrwxrwxrwx 1 root root 9 Jan 11 2012 pci-0000:06:00.0-fc-0x21110002ac0008b4:0x0000000000000000 -> ../../sdc lrwxrwxrwx 1 root root 9 Jan 11 2012 pci-0000:2a:00.0-fc-0x20110002ac0008b4:0x0000000000000000 -> ../../sdb .. container:: :name: cb3 :: [root@server]# ls -hal /dev/disk/by-id/ total 0 drwxr-xr-x 2 root root 140 Jan 11 2012 . drwxr-xr-x 6 root root 120 Jan 11 2012 .. lrwxrwxrwx 1 root root 9 Jan 11 2012 scsi-350002ac0343408b4 -> ../../sdb lrwxrwxrwx 1 root root 9 Jan 11 2012 scsi-3600508e000000000cbd00903176ab80b -> ../../sda lrwxrwxrwx 1 root root 10 Jan 11 2012 scsi-3600508e000000000cbd00903176ab80b-part1 -> ../../sda1 lrwxrwxrwx 1 root root 10 Jan 11 2012 scsi-3600508e000000000cbd00903176ab80b-part2 -> ../../sda2 lrwxrwxrwx 1 root root 10 Jan 11 2012 scsi-3600508e000000000cbd00903176ab80b-part3 -> ../../sda3 blkid ----- .. container:: :name: cb4 :: [root@server]# blkid /dev/mapper/vg00-lv02: UUID="520d3a30-a118-4373-a190-7c6cbfc341df" SEC_TYPE="ext2" TYPE="ext3" /dev/mapper/vg00-lv03: UUID="1de15bdc-e56c-4ae1-98c6-9b4508675225" SEC_TYPE="ext2" TYPE="ext3" /dev/mapper/vg00-lv04: UUID="0e7d6223-689b-4f0d-b24d-3b89fe07ea63" SEC_TYPE="ext2" TYPE="ext3" /dev/mapper/vg00-lv06: UUID="b92c1864-a23b-4b5f-ba4b-5672b279c200" SEC_TYPE="ext2" TYPE="ext3" /dev/mapper/vg00-lv05: UUID="5f8cf0b5-aae1-4aaa-bf4c-fc64b3a0f499" SEC_TYPE="ext2" TYPE="ext3" /dev/mapper/vg00-lv01: UUID="fd84dcfb-c2b6-4848-b26f-77714313729b" SEC_TYPE="ext2" TYPE="ext3" /dev/vg00/lv01: UUID="fd84dcfb-c2b6-4848-b26f-77714313729b" SEC_TYPE="ext2" TYPE="ext3" /dev/fioa1: UUID="afd10bb6-d937-4bf7-bc2c-dcd7ff256fe9" SEC_TYPE="ext2" TYPE="ext3" /dev/mapper/vg01-lvol0: UUID="75aaa9e7-33b8-4037-a919-33ff57662136" SEC_TYPE="ext2" TYPE="ext3" /dev/sda1: LABEL="/boot" UUID="4a68f1c6-ad6c-40fb-a0b9-083931ae5ec4" SEC_TYPE="ext2" TYPE="ext3" /dev/sda2: LABEL="SWAP-sda2" TYPE="swap" /dev/md0: UUID="afd10bb6-d937-4bf7-bc2c-dcd7ff256fe9" SEC_TYPE="ext2" TYPE="ext3" /dev/fiob1: UUID="afd10bb6-d937-4bf7-bc2c-dcd7ff256fe9" SEC_TYPE="ext2" TYPE="ext3" multipath --------- .. container:: :name: cb5 :: [root@server]# multipath -l mpath0 (350002ac0343408b4) dm-6 3PARdata,VV [size=100G][features=1 queue_if_no_path][hwhandler=0] \_ round-robin 0 [prio=0][active] \_ 3:0:0:0 sdb 8:16 [active][undef] \_ 5:0:0:0 sdc 8:32 [active][undef] # also look at multipath -v3 check for multipath software ---------------------------- - Does */etc/multipath.conf* exist? - On redhat / fedora / centos run the following command and review any output: .. container:: :name: cb6 :: [root@server]# rpm -qa | grep multip device-mapper-multipath-0.4.7-17.el5 - On debian / ubuntu run the following command and review any output: .. container:: :name: cb7 :: [root@server]# sudo dpkg --get-selections | grep multip multipath-tools install df and lvm ---------- Use df to learn about currently mounted devices, select an interesting mount and investigate: .. container:: :name: cb8 :: [root@server]# df Filesystem 1K-blocks Used Available Use% Mounted on ... /dev/mapper/vg01-lvol0 103208224 46826088 51139464 48% /disk1 ... Determine which volume group this this logical volume is part of: .. container:: :name: cb9 :: [root@server]# lvm lvdisplay /dev/mapper/vg01-lvol0 --- Logical volume --- LV Name /dev/vg01/lvol0 VG Name vg01 LV Size 100.00 GB ... Determine which physical volume this volume group (vg01) is part of: .. container:: :name: cb10 :: [root@server]# lvm pvdisplay --- Physical volume --- PV Name /dev/dm-6 VG Name vg01 PV Size 100.00 GB / not usable 4.00 MB ... Look closer at /dev/mpath: :: [root@server]# ls -hal /dev/mpath total 0 drwxr-xr-x 2 root root 60 Jan 11 2012 . drwxr-xr-x 15 root root 4.0K Mar 22 08:11 .. lrwxrwxrwx 1 root root 7 Jan 11 2012 350002ac0343408b4 -> ../dm-6 350002ac0343408b4 relates to the following: .. container:: :name: cb12 :: [root@server]# multipath -l mpath0 (350002ac0343408b4) dm-6 3PARdata,VV [size=100G][features=1 queue_if_no_path][hwhandler=0] \_ round-robin 0 [prio=0][active] \_ 3:0:0:0 sdb 8:16 [active][undef] \_ 5:0:0:0 sdc 8:32 [active][undef] 3PARdata is not local, its a SAN. -------------- | **Source:** https://foxhop.net/f3cb90db-2f95-11f1-91d9-e86a64d24d78/local-or-san-device-in-linux | **Snapshot:** 2026-10-16T05:55:55Z | **Generator:** Remarkbox ``d747782``