When the Task Scheduler service wakes, the computer to run a task, the screen may remain off even though the computer is no longer in the sleep or hibernate mode. Note: If the scheduled task is terminated, the backup task will be terminated and they will be no log generated.

Take the 'Backup' > 'Disk Write Performance.' menu option. The results of the write performance check also can be edited and re-tested using the Disk Write Performance dialog. The fastest write method is then saved for the drive and used for saving image files. This will generally take only a few seconds to complete and will only happen once. The test will simulate creating two 1GB image files to the target drive. Macrium Reflect will automatically determine the best method for writing to a target drive the first time the drive is used as a backup destination. Other factors that may affect the speed of a disk write method include software RAID (dynamic) disks and hardware/firmware RAID setups. This is usually faster for disks that have other processes reading or writing to the same disk or if the file system is fragmented. It uses the file system cache to buffer Image File data and will flush the cache to disk when either the cache is full or the Image file seeks to a different part of the disk to continue writing. Note This may not be the case for all disk and file systems, especially if the target file system is fragmented or nearly full.įile System Cache - This is the standard method of writing a file to a Windows File System.

However, for image files, where the data is sequentially written and there are no reads on the file system, using Direct Disk I/O can offer significant performance gains. For normal write operations in Windows this will be a slower operation as the file system cache does a great job of asynchronously flushing its cache as well using the cache to satisfy reading of the same data. Direct Disk I/O - This bypasses the file system cache and writes directly to the disk.

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