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Diffstat (limited to 'doc/source')
| -rw-r--r-- | doc/source/admin/drivers/ibmc.rst | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/doc/source/admin/drivers/ibmc.rst b/doc/source/admin/drivers/ibmc.rst index 76dcc4631..86d89c057 100644 --- a/doc/source/admin/drivers/ibmc.rst +++ b/doc/source/admin/drivers/ibmc.rst @@ -14,7 +14,7 @@ The ``ibmc`` hardware type supports the following Ironic interfaces: * Management Interface: Boot device management * Power Interface: Power management * `RAID Interface`_: RAID controller and disk management -* `Vendor Interface`_: BIOS management +* `Vendor Interface`_: ibmc passthru interfaces Prerequisites ============= @@ -200,6 +200,11 @@ no no max Physical disks choice strategy ------------------------------ +.. note:: + physical-disk-group: a group of physical disks which have been used by some + logical-disks with same RAID level. + + * If no ``physical_disks`` are specified, the "waste least" strategy will be used to choose the physical disks. @@ -215,9 +220,9 @@ Physical disks choice strategy with the minimum number of disks. * when ``share_physical_disks`` option is present, ``ibmc`` driver will - create logical disk upon existing physical-disk-groups(logical-disks) first. - Only when no exists physical-disk-group matches, then it chooses unused - physical disks with same strategy described upon. When multiple exists + create logical disk upon existing physical-disk-group list first. Only + when no existing physical-disk-group matches, then it chooses unused + physical disks with same strategy described above. When multiple exists physical-disk-groups matches, it will use "waste least" strategy too, the bigger capacity left the better. For example, to create a logical disk shown below on a ``ibmc`` server which has two RAID5 logical disks already. @@ -265,7 +270,7 @@ Physical disks choice strategy Examples -------- -A typical scene creates: +In a typical scenario we may want to create: * RAID 5, 500G, root OS volume with 3 disks * RAID 5, rest available space, data volume with rest disks |