Dell PowerVault MD3260i - Manual (Page 311)

Add Capacity, Add Physical Disks, And Segment Size
Setting the addCapacity parameter, the addPhysicalDisks parameter, or the segmentSize parameter starts
a long-running operation that you cannot stop. These long-running operations are performed in the background and do
not prevent you from running other commands. To show the progress of long-running operations, use the show
virtualDisk actionProgress command.
Cache Flush Modifier
Valid values for the cache flush modifier are listed in the following table.
Value Description
Immediate Data is flushed as soon as it is placed into the cache.
250 Data is flushed after 250 ms.
500 Data is flushed after 500 ms.
750 Data is flushed after 750 ms.
1 Data is flushed after 1 s.
1500 Data is flushed after 1500 ms.
2 Data is flushed after 2 s.
5 Data is flushed after 5 s.
10 Data is flushed after 10 s.
20 Data is flushed after 20 s.
60 Data is flushed after 60 s (1 min.).
120 Data is flushed after 120 s (2 min.).
300 Data is flushed after 300 s (5 min.).
1200 Data is flushed after 1200 s (20 min.).
3600 Data is flushed after 3600 s (1 hr).
Infinite Data in cache is not subject to any age or time
constraints. The data is flushed based on other criteria
that are managed by the RAID controller module.
Cache Without Battery Enabled
Write caching without batteries enables write caching to continue if the RAID controller module batteries are
completely discharged, not fully charged, or not present. If you set this parameter to TRUE without an uninterruptible
power supply (UPS) or other backup power source, you can lose data if the power to the storage array fails. This
parameter has no effect if write caching is disabled.
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