select a SSD for a given disk on a ganeti instance

• On the volume group used by ganeti there are two physical volumes
  • /dev/sda1 SATA
  • /dev/sdb1 SSD
• To prevent allocation of space on the SSD

  pvchange  --allocatable n /dev/sdb1
  

• To force allocation of space on the SSD

  pvchange  --allocatable y /dev/sdb1
  pvchange  --allocatable n /dev/sda1
  

• To force allocation of space on the SATA

  pvchange  --allocatable n /dev/sdb1
  pvchange  --allocatable y /dev/sda1