Damn i guess this does not work (due to insufficent space?):
May 8 19:07:34 xen-01-b SMGC: [8597] Set vhd-blocks = eJzt2LEJgEAMhtHS0tFvFMdwHC0FA9ENDkEJeO/Vge+vs+TtzGyZkT0xdU8+tc+1/SjuH8X9tTYPAAAAAAAAAAAAAMAzrXoAADCcbfA+AAAA8H/+D++5AMbVs9Q= for *ef6aa466[VHD](300.000G//300.504G|n)
May 8 19:07:34 xen-01-b SMGC: [8597] Num combined blocks = 153555
May 8 19:07:34 xen-01-b SMGC: [8597] Coalesced size = 300.504G
May 8 19:07:34 xen-01-b SMGC: [8597] Got other-config for b328d061[VHD](300.000G/242.496G/300.594G|n): {'leaf-coalesce': 'offline', 'content_id': 'c4cec5e9-e6f4-18a9-ad52-8db03ef0f2c9'}
May 8 19:07:34 xen-01-b SMGC: [8597] No space to leaf-coalesce b328d061[VHD](300.000G/242.496G/300.594G|n) (free space: 254355177472)
May 8 19:07:34 xen-01-b SMGC: [8597] ...but enough space if skip snap-coalesce
May 8 19:07:34 xen-01-b SMGC: [8597] Set leaf-coalesce = offline for b328d061[VHD](300.000G/242.496G/300.594G|n)
May 8 19:07:34 xen-01-b SMGC: [8597] Got sm-config for *ef6aa466[VHD](300.000G//300.504G|n): {'read-caching-reason-24097d1c-c678-417e-8a00-2257aee78fd2': 'SR_NOT_SUPPORTED', 'read-caching-enabled-on-24097d1c-c678-417e-8a00-2257aee78fd2': 'false', 'vdi_type': 'vhd', 'vhd-blocks': 'eJzt2LEJgEAMhtHS0tFvFMdwHC0FA9ENDkEJeO/Vge+vs+TtzGyZkT0xdU8+tc+1/SjuH8X9tTYPAAAAAAAAAAAAAMAzrXoAADCcbfA+AAAA8H/+D++5AMbVs9Q='}
May 8 19:07:34 xen-01-b SMGC: [8597] No work, exiting
May 8 19:07:34 xen-01-b SMGC: [8597] GC process exiting, no work left
I dont fully understand that, nothing changed?!:
May 8 19:07:34 xen-01-b SMGC: [8597] SR 646a ('Local SR R10 - 900GB') (2 VDIs in 1 VHD trees): showing only VHD trees that changed:
May 8 19:07:34 xen-01-b SMGC: [8597] *ef6aa466[VHD](300.000G//300.504G|n)
May 8 19:07:34 xen-01-b SMGC: [8597] b328d061[VHD](300.000G/242.496G/300.594G|n)
May 8 19:07:34 xen-01-b SMGC: [8597]