HP Storage Mirroring Software - Manual (Page 564)

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Folder—This is the location where the disk queue will be stored. Storage
Mirroring Recover displays the amount of free space on the volume selected.
Any changes made to the queue location will not take effect until the Storage
Mirroring service has been restarted on the server.
Select a location on a non-clustered volume that will have minimal impact on
the operating system and applications being protected. For best results and
reliability, this should be a dedicated, non-boot volume. The disk queue
should not be on the same physical or logical volume as the data being
replicated. Also, for best results, select a location that is on a different volume
as the location of the Windows pagefile.
Although the read/write ratio on queue files will be 1:1, optimizing the disk for
write activity will benefit performance because the writes will typically be
occurring when the server is under a high load, and more reads will be
occurring after the load is reduced. Accordingly, use a standalone disk,
mirrored (RAID 1) or non-parity striped (RAID 0) RAID set, and allocate more
I/O adapter cache memory to writes for best performance. A RAID 5 array will