Description: The device unit status for the physical disk or virtual disk. This value is a bit vector which, when set, corresponds to the following states:

Bit Description 0 TIM (time-out is enabled) 1 INT (Interrupt is expected) 2 ERLOGIP (Error log in progress on unit) 3 CANCEL (I/O on unit is canceled) 4 ONLINE (Unit is online) 5 POWER (Power failed while unit busy) 6 TIMOUT (Unit timed out) 7 INTTYPE (Receiver interrupt) 8 BSY (Unit is busy) 9 MOUNTING (Device is being mounted) 10 DEADMO (Deallocate at dismount) 11 VALID (Volume is software valid) 12 UNLOAD (Unload volume at dismount) 13 TEMPLATE (Template UCB) 14 MNTVERIP (Mount verification is in progress) 15 WRONGVOL (Wrong volume detected during mount verification) 16 DELETEUCB (Delete this UCB when reference count equals 0) 17 LCL_VALID (Volume is valid on local node) 18 SUPMVMSG (Suppress mount verification messages if they indicate success) 19 MNTVERPEND (Mount verification is pending on the device and the device is busy) 20 DISMOUNT (Dismount in progress) 21 CLUTRAN (VAXcluster state transition in progress) 22 WRTLOCKMV (Write-locked mount verification in progress) 23 SVPN_END (Last byte used from page is mapped by a system virtual page number ) 24 ALTBSY (Unit is busy via an alternate startup path) 25 SNAPSHOT (Restart verification is in progress)

A sDskStatus trap message is sent when a device transitions into the POWER, TIMOUT, or MNTVERIP state.