HP StorageWorks Storage Mirroring Recover Scripting Guide (T5437-96022, November 2010)

Notes—The QJournalFreeSpaceMin should be less than the amount of
physical disk space minus QJournalSpaceMax.
QJournalPreload
Description—The number of operations being pulled from the disk queue
at one time. Do not modify this setting.
QJournalSpaceMax
Description—The maximum amount of disk space, in MB, in the specified
QJournalDir that can be used for Storage Mirroring Recover queuing.
When this limit is reached, Storage Mirroring Recover will automatically
begin the auto-disconnect process.
Values—dependent on the amount of physical disk space available
Default—Unlimited
GUI Setting—Server Properties, Queue tab, Memory and Disk Usage,
Maximum disk space for queue
Service restart required—No
Notes—The unlimited setting allows the disk queue usage to
automatically expand whenever the available disk space expands. Setting
this option to zero (0) disables disk queuing. Even if you are using the
Unlimited option, Storage Mirroring Recover will only store 16,384 log
files. If you are using the default 5MB file size, this is approximately 80GB
of data. If you anticipate needing to be able to queue more data than this,
you should increase the size of the log files.
QLogWriteThrough
Description—Specifies if the disk queues are write-through mode
Values—0 Disk queues are not write-through mode, 1 Disk queues are
write-through mode
Default—0
GUI Setting—None
Service restart required—No
Notes—While write-through mode may decrease the frequency of auto-
disconnects, it may also decrease the performance of the source server.
QMemoryBufferMax
Description—The amount of Windows system memory, in MB, that, when
exceeded, will trigger queuing to disk.