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2.2.14 DRIVE_LETTER_INFO

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The DRIVE_LETTER_INFO structure provides information about a drive letter. It is used for drive letter assignment and free requests, for notification of drive letter changes, and for enumeration.

 struct driveletterinfo {
   wchar_t letter;
   LdmObjectId storageId;
   boolean isUsed;
   hyper lastKnownState;
   LdmObjectId taskId;
   unsigned long dlflags;
 };
 typedef struct driveletterinfo DRIVE_LETTER_INFO;

letter: Drive letter as a single case-insensitive alphabetical Unicode character.

storageId: Specifies the OID of the volume, partition, or logical drive to which the drive letter is assigned, if any.

isUsed: Boolean value that specifies if the drive letter is in use.

Value

Meaning

FALSE

0

Drive letter is free.

TRUE

1

Drive letter is in use.

lastKnownState: Modification sequence number of the drive letter.

taskId: Specifies the task identifier of the associated user request. If no request is made, the value is 0. For more information about this task identifier, see section 2.2.17.

dlflags: Bitmap of drive letter flags. The value of this field is generated by combining zero or more of the applicable flags defined as follows with a logical OR operation.

Value

Meaning

DL_PENDING_REMOVAL

0x00000001

Drive letter has a removal operation pending.