Volume detailed state:

LDS_NOT_STARTED (1) - LDs not started.
NOT_STARTED (2) - VV not started.
NEEDS_CHECK (3) - check for consistency.
NEEDS_MAINT_CHECK (4) - maintenance check is required.
INTERNAL_CONSISTENCY_ERROR (5) - internal consistency error.
SNAPDATA_INVALID (6) - invalid snapshot data.
PRESERVED (7) - unavailable LD sets due to missing chunklets. Preserved remaining VV data.
STALE (8) - parts of the VV contain old data because of a copy-on-write operation.
COPY_FAILED (9) - a promote or copy operation to this volume failed.
DEGRADED_AVAIL (10) - degraded due to availability.
DEGRADED_PERF (11) - degraded due to performance.
PROMOTING (12) - volume is the current target of a promote operation.
COPY_TARGET (13) - volume is the current target of a physical copy operation.
RESYNC_TARGET (14) - volume is the current target of a resynchronized copy operation.
TUNING (15) - volume tuning is in progress.
CLOSING (16) - volume is closing.
REMOVING (17) - removing the volume.
REMOVING_RETRY (18) - retrying a volume removal operation.
CREATING (19) - creating a volume.
COPY_SOURCE (20) - copy source.
IMPORTING (21) - importing a volume.
CONVERTING (22) - converting a volume.
INVALID (23) - invalid.
EXCLUSIVE (24) - local storage system has exclusive access to the volume.
CONSISTENT (25) - volume is being imported consistently along with other volumes in the VV set.
STANDBY (26) - volume in standby mode.
SD_META_INCONSISTENT (27) - SD Meta Inconsistent.
SD_NEEDS_FIX (28) - SD needs fix.
SD_META_FIXING (29) - SD meta fix.
UNKNOWN (999) - unknown state.
NOT_SUPPORTED_BY_WSAPI (1000) - state not supported by WSAPI.