Logical Volume Manager (LVM) on LINUX - Linux Devices & info

• Discovering added disk devices:
  

  # echo '- - -' | tee /sys/class/scsi_host/host*/scan >>/dev/null

• Discovering grown (virtural) disk/LUN:
  

  # echo 1 | tee /sys/block/sd*/device/rescan >>/dev/null

• Is it partitioned? What is it? Helpful tools:
  
  • # fdisk -l -u=sectors /dev/sdadisk_device
  • # sfdisk -uS -l disk_device
  • # blkid block_device
  • # pvdisplay block_device
  • # vgdisplay [volume_group_name]
  • # vgscan
  • $ mount
  • $ /sbin/swapon -s
• partitioning:
  
  • fdisk
  • cfdisk
  • gparted
  • sfdisk (dangerous)
  • ...
  • don't forget rescan!
• pvresize - resize (e.g. grow) a PV
  
• info:
  
  • {vg,lv,pv}display [-v|--verbose]
  • vgs, lvs, pvs
• RAID, multipath:
  
  • md, mdadm
  • multipath [-ll]