Table 6-1 lists the bitmap space default configuration. The sum of all bitmap memory allocation for all functions except FlashCopy must not exceed  552 MiB. Volumes can be configured to be thin-provisioned or fully allocated. A  thin-provisioned volume behaves as though application reads and writes were fully allocated. When a  thin-provisioned volume is created, the user specifies two capacities:  In a  fully allocated  volume, these two values are the same.  Therefore, the real capacity determines the quantity of MDisk extents that is initially allocated  to the volume. The  virtual capacity  is the capacity of the volume that is reported to all other  IBM Spectrum Virtualize components (for example, FlashCopy, cache, and remote copy), and  to the host servers.  The  real capacity  is used to store the user data and the metadata for the thin-provisioned  volume. The real capacity can be specified as an absolute value, or as a percentage of the  virtual capacity. GLYPH<SM590000> Its virtual capacity that is available to the host GLYPH<SM590000> The real physical capacity that is allocated to the volume from the storage pool c. FlashCopy includes the FlashCopy function, Global Mirror with change volumes, and  active-active relationships. b. Remote copy includes Metro Mirror, Global Mirror, and active-active relationships. a. The actual amount of functionality might increase based on settings, such as grain size and  strip size. RAID is subject to a 15% margin or error.  Table 6-1 Bitmap space default configuration Copy service Minimum  allocated  bitmap  space Default  allocated  bitmap  space  Maximum  allocated  bitmap  space Minimum $^{a}$  functionality  when using the default  values Remote copy b 0 20 MiB 512 MiB 40 TiB of remote mirroring  volume capacity FlashCopy c 0 20 M iB 2 GiB GLYPH<SM590000> 10 TiB of FlashCopy  source volume capacity GLYPH<SM590000> 5 TiB of incremental  FlashCopy source volume  capacity Volume  mirroring 0 20 MiB 512 MiB 40 TiB of mirrored volumes RAID 0 40 MiB 512 MiB GLYPH<SM590000> 80 TiB array capacity  using RAID 0, 1, or 10 GLYPH<SM590000> 80 TiB array capacity in  three-disk RAID 5 array GLYPH<SM590000> Slightly less than 120 TiB  array capacity in five-disk  RAID 6 array 6.1.5 Thin-provisioned volumes Chapter 6. Volume configuration  317